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1. Data Rate Sample Rate 48 kHz Sample Rate 44 1 kHz Sample Rate 32 kHz 56 kbps 1 19 ms 2 35 ms 2 93 ms 64 kbps 1 18 ms 2 33 ms 2 97 ms 80 kbps 1 26 ms 2 39 ms 3 13 ms 96 kbps 1 23 ms 2 35 ms 3 30 ms 112 kbps 1 21 ms 2 4 ms 3 47 ms 128 kbps 1 19 ms 2 37 ms 3 63 ms 160 kbps 1 14 ms 2 38 ms 3 97 ms 192 kbps 1 20 ms 2 50 ms 4 30 ms 224 kbps 1 16 ms 2 5 ms 4 63 ms 256 kbps 1 21 ms 2 53 ms 4 97 ms 320 kbps 1 22 ms 2 66 ms 5 63 ms 384 kbps 1 23 ms 2 70 ms 6 30 ms 448 kbps 1 14 ms 2 83 ms 6 97 ms 512 kbps 1 16 ms 2 86 ms 7 63 ms 576 kbps 1 17 ms 2 99 ms 8 30 ms 640 kbps 1 18 ms 3 13 ms 8 97 ms B 3 Model DP562 User s Manual Latency Values B 2 2 DP562 Delay with respect to IEC 61937 specification for Silent Switch mode Table B5 gives the additional delay of the DP562 with respect to IEC 61937 when the DP562 is in Silent Switch mode The delay is increased due to the buffering needed to minimize audible glitches from appearing at the output when the input data is switched between Dolby Digital and PCM Table B 5 DP562 additional delay with respect to the IEC 61937 specified latency for Silent Switch mode Data Rate Sample Rate 48 kHz Sample Rate 44 1 kHz Sample Rate 32 kHz 56 kbps 32 49 ms 36 15 ms 49 13 ms 64 kbps 32 38 ms 36 03 ms 48 97 ms 80 kbps 32 16 ms 35 79 ms 48 63 ms 96 kbps 31 93 ms 35 55 ms 48
2. TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU ENTER ENTER AES EBU CH SEL gt AES EBUCHSEL AUTO DETECT ENTER A AES EBU CH SEL AUTO DETECT li A ES AES EBU CH SEL OR ESCAPE y CHANNEL 18 KA OR MENU NAVIGATOR y CHANNEL 21M To adjust AES EBU Channel Select NOTE If you are not in the Setup mode press SETUP 1 Scroll through the Setup menu using the T and J buttons to find AES EBU Ch Sel 2 Select AES EBU Ch Sel by pressing ENTER Press ENTER again to enable the Edit Level The Edit Level is defined by a black flashing cursor 4 Once in the Edit Level use the Ch and 4 buttons to choose AUTO DETECT CHANNEL 1 or CHANNEL 2 Press ENTER to save your selection The parameter takes effect and returns you to the Status Level To exit AES EBU Ch Sel e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 10 Model DP562 User s Manual Setup 5 8 Stream Select Stream Select chooses one of eight streams 0 7 within the AES EBU bitstream TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU STREAM SELECT ENTER ENTER gt STREAM SELECT STREAM 00 y ENTER STREAM SELECT ESCAPE STREAM 7 B MENU NAVIGATOR To adjust Stream Select NOTE f you are not in the Setup mode press SETUP
3. CUST COMPRESSION CUT 1 00 ENTER CUST COMPRESSION BOOST 1 008 A Y CUST COMPRESSION ESCAPE ENTER CUST COMPRESSION CUT 1 008 approximately five seconds or 2 pressing TEST NOISE or SETUP 2 Press ENTER to get into the Status Level to view the current parameter settings Use the f and 4 buttons to scroll through the menu to select which parameter you need to modify Dialog Norm Adjust Lo Level Adjust Hi Level or to return to a previous menu level 3 Upon selecting which adjustment you need to modify press ENTER to initiate the Edit Level The Edit Level is defined by a black solid flashing cursor 4 Once in the Edit Level if you have selected e Dialog Norm Press ENTER to toggle between ENABLED or DISABLED The adjustment takes effect as soon as the button is pressed e Adjust Lo Level or Adjust Hi Level Use the T and H buttons to adjust the level of BOOST or CUT from 1 00 no level to 0 00 maximum in 0 1 increments The adjustment takes effect as soon as ENTER is pressed NOTE f the menu is enabled but not in use for approximately five seconds the display will revert to the Status Screen For an explanation of Status Level and Edit Level refer to Section 5 of this manual 4 5 Model DP562 User s Manual 4 4 2 Line Compression allows scaling of low
4. 4 2 Model DP562 User s Manual Operation 4 2 4 Pass through Mode In the Pass through mode the DP562 functions as a bypass device with DAC Digital to Analog Converter Only Stereo and Mono listening modes are supported To enable the Pass through mode Press DOLBY DIGITAL and DOLBY PRO LOGIC to turn off both modes Their respective LEDs will turn off Enabling the Pass through mode as mentioned above only applies when the bitstream detect is set to DISABLED NOTE f Bitstream Detect is set to REFERENCE or SILENT SWITCH the Dolby Digital LED will flash periodically 4 3 Listening Modes Downmix Three decoding modes Dolby Digital Dolby Pro Logic and Dolby Digital Dolby Pro Logic support five listening modes Simply press the button labeled with the listening mode you desire Full All channels dependent upon input channel mode and decoding mode selected are reproduced in their appropriate location factory default e 3 Stereo Left surround signal is sent to left front speaker right surround signal is sent to right front speaker Phantom Center channel signal is sent to the front left and right speakers e Stereo Left surround signal is sent to left front speaker right surround signal is sent to right front speaker center channel signal is sent to the left and right front speakers LFE channel is not included Mono All channels signals are sent to the center speaker
5. e Example Press ENTER Model DP562 User s Manual Introduction and Pre Installation 1 2 Menu selections shown in the liquid crystal display LCD of the DP562 are represented as follows In the body of the text they are written in bold face type User menu In figures a frame surrounds the text USER FUNCTION About the Dolby Model DP562 The Dolby DP562 is a reference decoder for monitoring audio video and multimedia programs with multichannel sound The unit decodes Dolby Digital AC 3 program material with up to 5 1 channels and provides four channel Dolby Pro Logic decoding for matrix encoded surround material see Appendix A About Dolby Digital and Dolby Pro Logic It can also be used to downmix a multichannel Dolby Digital input signal to a two channel Lt Rt Dolby Surround signal for simultaneous monitoring through the Pro Logic decoder Unlike previous professional surround decoders the DP562 can decode Dolby Pro Logic in the digital domain therefore it is now possible to monitor Dolby Surround encoded PCM soundtracks without converting them to analog The unit occupies 1U 44 mm 1 75 of standard 19 rack space Features Dolby Digital and Dolby Pro Logic decoding e Dolby Digital IEC 1937 or PCM AES EBU input via XLR connector e Automatic Dolby Digital bitstream detection e Three digital AES EBU and six balanced analog outputs XLR connectors e 20 bit digital to analog converters e Ana
6. stata costruita in accordo alle norme di sicurezza IEC 65 Per una perfetta sicurezza ed al fine di evitare eventuali rischi di scossa elettrica o d incendio vanno osservate le seguenti misure di sicurezza o Assicurarsi che il selettore di cambio tensione sia posizionato sul valore corretto o Assicurarsi che la portata ed il tipo di fusibili siano quelli prescritti dalla casa costruttrice o L apparecchiatura deve avere un collegamento di messa a terra ben eseguito anche la connessione rete deve avere un collegamento a terra o Il cavo di alimentazione a corredo dell apparecchiatura deve essere collegato come segue Filo tensione Marrone Neutro Blu Massa Verde Giallo AVISO IMPORTANTE DE SEGURIDAD Esta unidad cumple con la norma de seguridad EN60065 Para asegurarse un funcionamiento seguro y prevenir cualquier posible peligro de descarga o riesgo de incendio se han de observar las siguientes precauciones o Aseg rese que el selector de tensi n est ajustado a la tensi n correcta para su alimentaci n o Aseg rese que los fusibles colocados son del tipo y valor correctos tal como se marca en la unidad o Launidad debe ser puesta a tierra conect ndola a un conector de red correctamente cableado y puesto a tierra o El cable de red suministrado con esta unidad debe ser cableado como sigue Vivo Marr n Neutro Azul Tierra Verde Amarillo VIKTIGA SAKERHETSATGARDER Denna enhet uppfyller s kerhetsstandard EN60065 F r att garantera s
7. A v BITSTREAM DETECT A v AES EBU CH SEL A v STREAM SELECT A v SRND CNTR DELAY A v BASS REDIRECTION A v TEST NOISE A v USER PRESETS A v CONTRAST ADJUST A Model DP562 User s Manual Setup 5 1 Master Level Adjust Master Level allows you to adjust the overall level of the six balanced analog outputs from 10 dB to 95 dB in 0 5 dB increments 0 dB equals 24 dBU full scale TOP LEVEL STATUS LEVEL EDIT LEVEL ENTER weg ENTER y s MASTER LEVEL ee LEVEL 0 00dB Kl MASTER LEVEL T LEVEL 0 0048 MASTER LEVEL ESCAPE MENU NAVIGATOR To modify Master Level NOTE f you are not in the Setup mode press SETUP 1 Find Master Level by scrolling through the Setup menu by pressing the T and J buttons Select Master Level by pressing ENTER NOTE Use the T and A buttons if you wish to return to the previous menu 2 Press ENTER again to initiate the Edit Level The Edit Level is defined by a black flashing cursor 3 Atthe Edit Level use the f and RA buttons to adjust the overall output level The parameter takes effect as soon as the f and RA buttons are pressed NOTE Holding down the T or 4 button for three seconds in the Edit Level enables speed scrolling 4 After adjusting the output press ENTER to return to the Status Level a
8. SRND CNTR DELAY ESCAPE To adjust the surround or center delay NOTE If you are not in the Setup mode press SETUP 1 Using the T and J buttons scroll through the Setup menu to find SRND CNTR Delay 2 Press ENTER to select SRND CNTR Delay 3 Atthe Status Level use the f and BA buttons to choose which delay you would like to modify or you may return to the previous menu level at this time 4 Press ENTER after making your selection 5 Inthe Edit Level use the Ch and 4 buttons to adjust the delay Press ENTER to save your selection The parameter takes effect and returns you to the Status Level To exit SRND CNTR Delay e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 12 Model DP562 User s Manual Setup 5 10 Bass Redirection Bass Redirection redirects bass from one set of audio channel s to another The number and frequency specifications of loudspeakers present in the listening environment usually determine the selection TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU ENTER ENTER BASS REDIRECTION BASS REDIRECTION ENTER NONE BASS REDIRECTION x NONE ll 7 ENTER OR CENTER gt SWH A OR y SURROUND gt SW Mi OR CNTR SRND gt SWE OR L C R S SWE OR CENTER zi IRE OR SURROUND gt L RE OR ME
9. The diagram below depicts the Setup menu To operate the Setup menu e Press SETUP on the front panel The dedicated LED illuminates red to indicate that the DP562 is in Setup mode Press the T and J buttons on the front panel to scroll through the menu e Press ENTER at any parameter to enter the Status Level e Press SETUP at any time to exit the Setup menu and return to Status mode Each menu item has three levels Top Level Status Level and Edit Level The Top Level represents the Setup menu which lists the various audio adjustments available Press the T and J buttons to navigate through this level Press ENTER to initiate the Status Level The Status Level allows you to view a current parameter setting and select the parameter you would like to adjust Press the f and RA buttons to navigate through this level too Note that the Status Level provides an option to return to the previous menu as you loop through the menu at this stage Press ENTER to initiate the Edit Level The Edit Level allows you to perform adjustments A flashing black cursor in the LCD display indicates that you are in the Edit Level Press the T and J buttons to adjust a selected parameter at this level Press ENTER for the adjustment to take effect which will also return you to the Status Level 5 1 SETUP MENU MASTER LEVEL A v OUTPUT CH TRIMS A v ASSIGN CHANNELS A v LFE MONITOR MODE A v HEADPHONE MODE
10. To enable compatible playback in mono theaters Dolby developed a new multichannel soundtrack to fit in the same space on release prints as a conventional mono track This was made possible by using two optical tracks matrix encoded with four channels of information left center and right screen channels plus a surround channel The four channels were reconstructed in the cinema by means of a matrix decoder combined with sophisticated steering techniques Because the original four channel encoding remained intact when encoded films were transferred to stereo home video media it was a logical next step to provide multichannel playback in the home At first simple Dolby Surround decoders as they were called made it possible to reproduce the surround channel along with the left and right channels Because of the limitations of this approach including the lack of a center channel to locate dialogue firmly on the screen more sophisticated Dolby Pro Logic decoding was soon introduced to the consumer market It used the advanced steering circuitry developed originally for the cinema to provide full four channel playback Figure A 1 Power amps gt R Left Center Right Lt Dolby Pro al Logic gt C Rt Decoder C Br L 4 G gt Surround Figure A 1 Dolby Pro Logic playback configuration A 1 Model DP562 User s Manual About Dolby Pro Logic
11. kerheten och gardera mot eventuell elchock eller brandrisk maste f ljande observeras o Kontrollera att sp nningsv ljaren r inst lld p korrekt n tsp nning o Konrollera att s kringarna r av r tt typ och f r r tt str mstyrka s som anvisningarna p enheten f reskriver o Enheten m ste vara jordad genom anslutning till ett korrekt kopplat och jordat el uttag o El sladden som medf ljer denna enhet m ste kopplas enligt foljande Fas Brun Neutral Bl Jord Gr n Gul BELANGRIJK VEILIGHEIDS VOORSCHRIFT Deze unit voldoet aan de EN60065 veiligheids standaards Voor een veilig gebruik en om het gevaar van electrische schokken en het risico van brand te vermijden dienen de volgende regels in acht te worden genomen o Controleer of de spanningscaroussel op het juiste Voltage staat o Gebruik alleen zekeringen van de aangegeven typen en waarden o Aansluiting van de unit alleen aan een geaarde wandcontactdoos Fase Bruin Nul Blauw Aarde Groen Geel ooo vii ND Model DP562 User s Manual Chapter 1 Introduction and Pre Installation Thank you for purchasing the DP562 Multichannel Dolby Digital and Dolby Pro Logic Decoder The DP562 is designed to serve as the reference decoder for all high performance monitoring applications We hope that the DP562 will offer you the exceptional quality that you expect from all of our professional audio products 1 1 About This Manual This User s Manual has been pr
12. 30 ms 112 kbps 31 71 ms 35 31 ms 47 97 ms 128 kbps 31 49 ms 35 07 ms 47 63 ms 160 kbps 31 04 ms 34 58 ms 46 97 ms 192 kbps 30 60 ms 34 10 ms 46 30 ms 224 kbps 30 16 ms 33 61 ms 45 63 ms 256 kbps 29 7 ms 33 13 ms 44 97 ms 320 kbps 28 82 ms 32 16 ms 43 63 ms 384 kbps 27 93 ms 31 20 ms 42 30 ms 448 kbps 27 04 ms 30 23 ms 40 97 ms 512 kbps 26 16 ms 29 26 ms 39 63 ms 576 kbps 25 27 ms 28 29 ms 38 30 ms 640 kbps 24 38 ms 27 33 ms 36 97 ms B 3 DP562 Latency Absolute delay specification This section specifies the latency absolute delay of the DP562 with respect to the beginning of the data burst on either the AES3 or SPDIF interfaces B 3 1 DP562 latency for AES3 professional interface Table B6 specifies the DP562 latency with respect to the beginning of the Dolby Digital data packet on the AES3 professional interface In Disabled and Reference Detect modes the latency is nominally one sample frame In Silent Switch Mode there is approximately 7 10 ms additional decoding latency in order to minimize audio artifacts during bitstream switching Table B 6 DP562 latency for AES3 interface and for SPDIF interface in Silent Switch mode Sample Rate Disabled and Reference Detect Silent Switch Modes Mode 48 kHz 32 ms 38 6 ms 44 1 kHz 35 7 ms 42 8 ms 32 kHz 48 4 ms 58 3 ms B 4 Model DP562 User s Manual Latency Values B 3 2 DP562 latency for SPDIF interface Table B7 specifies the DP562 late
13. Dolby Digital frame occurring on the interface The SMPTE specification allows equipment that outputs Dolby Digital streams on the AES3 interface to know when with respect to time code or associated video to output each Dolby Digital frame of data in order to allow a standard decoder to reproduce audio at the proper presentation time The specification also allows equipment that receives the Dolby Digital data to know when the audio in each frame should be reproduced Another way to maintain synchronization is by using time stamps The SMPTE specification provides for a time stamp to be associated with an audio frame of data The time stamp can indicate the time code value that applies to an identified sample within a Dolby Digital frame The time stamp can also indicate an absolute time offset of the stream so that a Dolby Digital encoder for example can identify its own latency to another piece of equipment for example a MPEG multiplexer Proposed SMPTE Standard for Television Format for Non PCM Audio and Data in AES3 ATSC A 52 AC 3 Data Type Second Draft W25 008 Aug 9 1999 Note Check with SMPTE for availability of this standard Committee Draft Interface for non linear PCM encoded audio bitstreams applying IEC 60958 15 March 1998 IEC 100C 196 CDV Note Check with IEC for availability of this standard B 1 Model DP562 User s Manual Latency Values Table B1 shows the SMPTE Standard specified decoder laten
14. LOADING DSP2 Model DP562 User s Manual Future Software Upgrades 6 3 Software Upgrade Fault Messages If one of the following faults occur while performing a serial upgrade reset the DP562 and repeat the software upgrade process Reset the DP562 by following these steps Press the Setup menu 2 Scroll through the menu to User Presets 3 Select FACTORY RESET If you are not able to enter the Setup menu unplug then re plug mains power to the DP562 This resets the DP562 If the problem continues record the error number displayed and contact Dolby Laboratories technical support DO MODEL DP562 Checksum Error Level 1 DOWNLOAD ERROR 0 or Program Error Level 1 DOWNLOAD ERROR 1 or Checksum Error Level 2 DOWNLOAD ERROR 2 or Program Error Level 2 DOWNLOAD ERROR 3 or Low Level SCI Fault DOWNLOAD ERROR 4 Model DP562 User s Manual Appendix A About Dolby Pro Logic and Dolby Digital A 1 Dolby Pro Logic Multichannel sound was first heard widely with the widescreen movie formats developed in the early 1950s They featured four to six channels recorded on stripes of magnetic oxide applied to each release print a costly and time consuming process In the mid 1970s Dolby Laboratories introduced a new more practical multichannel sound format for 35 mm prints Instead of magnetic striping it was based on the photographic or optical soundtrack that had been used to put mono sound on film since the 1930s
15. MOVIE MUSIC MUSIC BROADCAST llllza Figure C 2 Audio levels normalized for equal loudness C 6 Model DP562 User s Manual Dynamic Range Compression Dialog Normalization amp Downmixing for Dolby Digital GA Downmixing Modes Whenever the number of decoder outputs is less than the number of channels in the Dolby Digital program downmixing is required The decoder may change the downmixing process based on the number of speakers in the system or on the number of audio outputs needed e g with headphone listening C 4 1 Speaker Output Configurations The following table describes the behavior of the Dolby Digital decoder when downmixing Rather than considering the following modes as forced downmix modes they should be seen as corresponding to speaker output configurations Key for input configurations 1 Imposes 11 dB gain shift if using Custom or None Compression Modes the 11 dB gain shift is recovered in the analog outputs only 2 Splits the mono surround into two and attenuates each by 3 dB 3 No surround channel outputs 4 No center channel outputs 5 No left and right channel outputs 6 Routes center to left and right C 7 Model DP562 User s Manual Appendix D Glossary AES EBU Format Audio Engineering Society European Broadcasting Union format Algorithm A procedure for solving a mathematical problem finding the greatest common divisor in a finite number of steps that frequently invol
16. SampRate o Bitstream sample rate 32kHz SampRate o When Dolby Digital is manually selected Invalid Dolby Digital sample rate No AC 3 Input o Invalid Dolby Digital sample rate Invalid S Rate o Invalid Dolby Digital data rate Invalid D Rate o Bitstream selected in Setup menu is absent Stream N Absent o E Invalid Dolby Digital bitstream Invalid Bitstream 4 13 Model DP562 User s Manual Operation 4 10 Runtime Fault Messages If any of the following faults occurs during initialization or normal system use the unit will attempt to reboot after approximately 20 seconds or you can also manually reset the DP562 To reset the DP562 1 Press the Setup menu If you are not able enter the Setup menu turn off the power by unplugging the unit and then turn on the unit again 2 Scroll through the menu to User Presets 3 Select Factory Reset If the problem continues to persist note down the error number and contact Dolby Laboratories for technical support DO MODEL DP562 Initialization fault System Error 0 or System Error 1 HC11 fault or System Error 2 Dolby Digital Decoder fault or System Error 3 Dolby Pro Logic Decoder fault or System Error 4 SPI Communications fault or System Error 5 General System fault 4 14 Model DP562 User s Manual Chapter 5 Setup The Setup menu allows you to configure and modify the DP562 into different modes of operation
17. a Y L R C Sw Ls Rs r ENTER CH 3 LEFT SRND MAX L R C Sw Ls Rs D CH 3 LEFT SRNDE D L R C Sw Ls Rs 7 ENTER CH4 RIGHTSRND L R C Sw Ls Rs A CH 4 RIGHT SRNDE Y L R C Sw Ls Rs d CH 5 CENTER ENTER k m L R C Sw Ls Rs CH 5 CENTER y R C Sw Ls Rs USER CH 6 SUBWOOFER LIRICISwILsIRs a CH 6 SUBWOOFERS Y ASSIGN CHANNELS ESCAPE To assign audio channels to an output connector NOTE f you are not in the Setup mode press the SETUP button Setup 1 Scroll through the Setup menu using the T and J buttons to find Assign Channels 2 Select Assign Channels by pressing ENTER You have now entered the Status Level 3 Use the M and BA buttons to scroll through the Assign Channels menu and select a physical output connector to be changed You can also loop back to the previous menu by continuing to scroll through the menu 4 After you have selected the output connector you want to adjust press ENTER to get to the Edit Level The Edit Level is defined by a black flashing cursor 5 At the Edit Level use the T and 1 buttons to assign the audio channel to a new output connector 6 Press ENTER to allow the adjustments to take effect and to return to the Status Level To exit Assign Channels e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press the SETUP button to return to th
18. and two channel formats it is also specified for ATSC digital television broadcasting Dolby Digital can process at least 20 bit dynamic range digital audio signals over a frequency range from 20 Hz to 20kHz 0 5 dB 3 dB at 3Hz and 20 3kHz Sampling rates of 32 44 1 and 48 kHz are supported with data rates ranging from as low as 32 kb s for a single mono channel to as high as 640 kb s for multiple channels Typical applications include 384 kb s for 5 1 channel Dolby Digital consumer formats and 192 kb s for two channel distribution D 1 Model DP562 User s Manual Glossary Dolby Pro Logic Dolby Pro Logic is Dolby s second generation licensed home surround system A major advantage of Dolby Pro Logic is the use of an active center channel with its own speaker Conventional stereo systems create a phantom center channel which is effective for viewers seated directly in front of the television screen However for viewers seated elsewhere the dialogue can appear to come from off center Dolby Pro Logic and the use of an appropriately placed center channel loudspeaker allow the dialogue to be heard straight from the screen The main left and right stereo speakers are widely spaced for a good spread on music and effects Dolby Pro Logic decoders also optimally decode surround information which is typically fed to a pair of surround speakers slightly behind and to the left and right of the listener Downmixing The combination or mix do
19. at this time Press ENTER again You will see a black flashing cursor e 6 Usethe M and LU buttons to select the set of channels for bass redirection The adjustment takes effect and returns you to the Status Level as soon as ENTER is pressed 7 Next you may wish to select the Bass Redirection Crossover frequency Scroll down to Bass Redirection X OVER 8 Press ENTER You will again see a black flashing cursor 9 Press the f and BA buttons to select the level of crossover you desire 80 Hz 100 Hz or 120 Hz Press ENTER to save the configuration 10 Press SETUP on the front panel to exit the Setup menu and return to normal operation There are two settings for test noise in the DP562 PINK or FILTERED If no bass redirection is chosen NONE default calibration of the monitoring system should be made using the PINK test noise option This option uses a full band pink noise signal If a Bass Redirection option other than NONE is selected calibration of your monitoring system should be made using the FILTERED test noise option This will compensate for the absence of low frequencies in your main monitoring speakers These selections can be performed in the Setup menu See Section 5 10 for complete instructions 3 4 Model DP562 User s Manual Calibration 3 3 Individual Channel Calibration 3 3 1 Main Channels The following steps describe the procedure for systems tha
20. e 1 dB gain shift imposed when downmixing to prevent peak level overload Custom Mode allows you to adjust both low level boost and high level cut scaling parameters A restriction when downmixing in Custom Mode is that an 11 dB gain shift is imposed to insure that there is no overload since compression can be defeated This provides fail safe protection when downmixing because dynrng may not be present to prevent overload the 11dB gain shift is recovered in the analog outputs but not in the digital outputs C 3 Model DP562 User s Manual Dynamic Range Compression Dialog Normalization amp Downmixing for Dolby Digital C 2 4 No Compression None In None Mode both compression and dialogue normalization are disabled None Mode is a professional listening mode used to hear the full level and dynamics in the program material being encoded It is never allowed in a consumer product and may not represent either the level balance or dynamic range heard in a consumer decoder Encoding judgments based on this compression mode should not be made Features e Dialogue normalization disabled e Dynrg style compression disabled e 11dB gain shift imposed when downmixing to prevent peak level overload The 1 dB gain shift is recovered in the analog outputs but not in the digital outputs C 2 5 Summary of Operational Modes The following table is a summary of the various operational modes discussed above Dialogue Hi
21. for 100 ms when CRC error detected Ground and pot low p a ee 6 Potwipr Controls remote level Pot hi Nees 2 O 8 Remote LED EE 9 Remoteswiteh____ _______ NOTE Pins 3 and 4 are internally shorted to detect CRC errors CRC Cyclical Redundancy Checksum verifies whether the transmission of data is error free or not When a CRC error is detected it is added to the CRC log The CRC log on the LCD display is viewable when the DP562 is in Status mode see Section 4 9 Status Mode 2 3 Model DP562 User s Manual Installation The circuit in Figure 2 1 can be used for monitoring status and controlling the analog output level remotely L4 N General System Alarm LA RED YELLOW E UN CRC Error Y YELLOW S77 Power Supply Ground 10K Power Supply 5V ADJUST 0 Oe Ed Oe ke Ie gt E REMOTE LEVEL a ko jo co m o 560 Ohm E SPDT E REMOTE LEVEL ENABLE Figure 2 1 Remote Circuit Example 2 4 Serial Input Output I O Connections The DP562 is categorized as a data communications equipment DCE device The serial I O connector of the DP562 can accept commands from a personal computer via an RS 232 serial interface protocol with a minimum two wire connection half duplex The serial I O port supports a ten bit asynchronous serial data format one start bit one stop bit eigh
22. for the surround channels would be five milliseconds for Dolby Digital 15 Distance from C 10 Distance from S 5 Surround delay for Dolby Digital The Dolby Digital delay range can be adjusted from 0 to 50 milliseconds in one millisecond steps To set the Dolby Digital Surround delay 1 Press SETUP on the front panel This takes you to the Setup menu 2 Scroll down the Setup menu using the J button Select Srnd Cntr Delay and press ENTER 3 Using the Ch and BA buttons scroll through the Srnd Cntr Delay menu until you find AC 3 Srnd 4 Press ENTER then use the Ch and BA buttons to display delay value in milliseconds Press ENTER again to save the adjustment 5 Press SETUP to exit the Setup menu and return to normal operation See Section 5 Setup for more information 3 9 Model DP562 User s Manual Calibration Time Delay for Center Channel The concept of coincident arrival can also be applied to the adjustment of the center channel in Dolby Digital mode The DP562 factory default for the center delay is 0 milliseconds If the center speaker can be placed at the same distance from the listener as the left and right speakers in an arc to achieve equal path lengths i e Distance C Distance L Distance R then no delay is required If the center speaker is placed closer to the listening position than the left and right speakers or further back then time delay can be added or subtracted to the c
23. one piece of equipment in the audio chain To minimize the addition of circulating ground currents in a particular installation the default setting for this jumper link is OPEN Note that there is always a 1k Q resistor across the link so that the audio ground is never totally isolated from the chassis ground To connect audio ground directly to chassis ground in the DP562 remove the cover and move jumper J13 to the closed position WARNING The chassis is always connected to the ground pin of the power line cord For safety reasons this ground wire must NEVER be disconnected 2 1 2 2 2 2 1 Model DP562 User s Manual Chapter 2 Installation Mounting The DP562 occupies a 1 U 1 34 x 19 rack mount and can be positioned in any orientation Ensure adequate ventilation and do not mount the unit directly above any heat generating equipment The unit operates within specifications up to a maximum ambient temperature of 50 C 122 F Note that the ambient temperature inside a poorly ventilated rack may be considerably higher than the room temperature Audio Connections See rear panel drawing on page 1 5 Asingle female input XLR is provided for digital sources Dolby Digital AC 3 or Dolby Surround encoded PCM Pulse Coded Modulation data e Three male output XLRs Ch 1 2 Ch 3 4 Ch 5 6 are provided for PCM data AES EBU e Six male XLR connectors that carry balanced floating analog outputs corresponds to Cha
24. pursuant to Part 15 of the FCC Rules It is UL listed for the U S and Canada Europe This product complies with the requirements of Low Voltage Directive 73 23 EEC and EMC Directive 89 336 EEC and carries the CE marking accordingly Warranty One year limited parts and labor Specifications subject to change without notice Model DP562 User s Manual Introduction and Pre Installation System Block Diagram External Level control RS232 Microcontroller tatus Out Assignable Digital Outputs DSP DSP Lm AES EBU transmitter 1 2 AC 3 Decoder Pro Logic AES EBU transmitter 3 4 Decoder EE 1 AES EBU transmitter 5 6 Assignable Analog Outputs Six 1 i 2 Mid Channel g anne DAC Level 4 Control 5 6 Power Supply 2 Headphone Channel Level Out Select Control H 1 4 Introduction and Pre Installation Model DP562 User s Manual ue gp UO uorssozduoo pue uorezi e uou Zopp TY 19 o ure1ed uorsso1duroo J349 yry pue MOT jo Sueos urojsno tuo uonezi e uou 30 erp AULT s19 o ure1ed uorsso1duroo 949 YSTY pue MOT jo Sueos urojsno o qejoo os uorezi e mon SOJPIP urojsn uorsso1duoo ou JUON pow uorsso1duroo orureu p e1131 qlo q 199198 uoissaidwoy orueu g epour IAI WH UI SINUN ay Uo A NO SI ASTON ISIL Jl pe qeuo sr ouuvqo a8uls v WO UONTIJUI snonunuo S RAIOJUL puooos OM JL s ouuvqo UE uano1g osrou yurd soouonbog 9SION 1S9 Anua nuaw dnjog sjoo os Ady 19 Uq nuaw dnjog u3noig p
25. 1 Inthe Setup menu use the T and J buttons to find Stream Select 2 Select Stream Select by pressing ENTER 3 At the Status Level press ENTER to initiate the Edit Level 4 At the Edit Level use the T and J buttons to choose a stream 0 7 within the AES EBU bitstream Press ENTER to save your selection The parameter takes effect and returns you to the Status Level To exit Stream Select e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode The stream number is specified in the burst info variable of the IEC 1937 Preamble Please refer to Annex B of the ATSC Standard Model DP562 User s Manual Setup 5 9 SRND CNTR Delay SRND CNTR Delay allows the adjustment of Center Channel Delay from 3 to 5 ms Dolby Digital Surround from 0 to 50 ms and Pro Logic Surround from 10 to 75 ms For information on calibrating the DP562 see Section 3 Calibration TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU ENTER ENTER SRND CNTR DELAY SRND CNTR DELAY le CENTER Oms ENTER JSRND CNTR DELAY CENTER Omsll ENTER ENTER SRND CNTR DELAY EET MENU NAVIGATOR AC3 SRND Oms wl SRND CNTR DELAY A AC3 SRND Omsl Y ENTER SRND CNTR DELAY ENTER PLSRND 15ms SRND CNTR DELAY A PL SRND 15msli Y
26. 1 Dialogue Normalization Across Program see C 5 Downmix ing Modes eid i Hai e et ie ied ca Hans i de Picea ira a pee C 7 C 4 Speaker Output Confgeuratons nennen C 7 Appendix D Glossary Model DP562 User s Manual Regulatory Notices FCC This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with this instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his or her own expense Canada This Class A digital apparatus complies with Canadian ICES 003 UL Troubleshooting must be performed by trained technicians Do not attempt to service this equipment unless you are qualified to do so WARNING Check that the correct fuses have been installed To reduce the risk of fire replace the fuses only with the same type and rating Exposed portions of the power supply are electrically hot In order to reduce the risk of electrical shock the power cord MUST be disconnected when the cover of this equipment is removed The gro
27. 2 Default Values The defaults listed below reflect the state of the DP562 when powered up for the first time If you change these values they can be recovered later by choosing FACTORY RESET in the User Presets of the Setup menu see Section 5 12 Front Panel Defaults Defaults are indicated in bold italics Decoding Mode Listening Mode Compression Mode Test Noise User Setup Dim Dolby Digital with Dolby Digital bitstream present Stereo with PCM present Full with Dolby Digital bitstream present Stereo with PCM present Line with Dolby Digital bitstream present None with PCM present Off Off Off Off Defaults in Setup Menu The following list shows the set of defaults in Factory Setup See Section 5 Setup Master Level Adjust Output Ch Trims Assign Channels LFE Monitor Mode Headphone Mode Bitstream Detect AES EBU Ch Sel Stream Select Srnd Cntr Delay Bass Redirection Test Noise User Presets Contrast Adjust Level 0 00 dB Left 0 00 dB Center 0 00 dB Right 0 00 dB R Surround 0 00 dB L Surround 0 00 dB Subwoofer 0 00 dB ILIRICISwILsIRsI Auto Select Mono Reference Auto Detect Stream 0 Center 0 ms AC3 Srnd 0 ms PL Srnd 15 ms None Pink Recall A Factory set 2 7 Model DP562 User s Manual Chapter 3 Calibration 3 1 Importance of Calibration Calibrating your playback system to establish a balance between all five main channels and to ensure that
28. 4 Press ENTER again to initiate the Edit Level The Edit Level is defined by a black flashing cursor 5 Usethe Ch and BA buttons to select the set of channels for bass redirection The adjustment takes effect and the DP562 returns to the Status Level as soon as ENTER is pressed 6 Next you must select the Bass Redirection Crossover At the Status Level scroll down to Bass Redirection X OVER 7 Press ENTER to initiate the Edit Level The Edit Level is defined by a black flashing cursor 8 Use the Ch and LU buttons to select the level of crossover you desire 80 Hz 100 Hz or 120 Hz Press ENTER to save your selection The parameter takes effect and returns you to the Status Level To exit Bass Redirection e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 14 Model DP562 User s Manual Setup 5 11 Test Noise Test Noise enables the selection of noise type generated by a noise sequencer built into the DP562 When Test Noise is FILTERED bandpass filtered pink noise from 400 Hz to 1500 Hz is generated to allow you to balance channels by ear from all speakers When Test Noise is PINK full band pink noise is generated The subwoofer outputs are band limited to 120 Hz TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU ENTER SER TEST NOISE _ TEST NOISE EN
29. D RECALL D O e SH O S T a E RECALL ENTER A USER PRESETS FACTORY RESET ENTER USER PRESETS SAVE PRESET A OR Y SAVE PRESET B li OR SAVE PRESET C ll OR SAVE PRESET Di ENTER A USER PRESETS ESCAPE To set up User Presets NOTE f you are not in the Setup mode press SETUP 1 Find User Presets by scrolling through the Setup menu with the Ch and BA buttons 2 Press ENTER to select User Presets 3 At the Status Level use the Ch and HJ buttons if you wish to RECALL SAVE or FACTORY RESET the current DP562 Setup You may also return to the previous menu level at this time 4 Press ENTER after you have chosen the setup you would like to recall or adjust 5 Atthe Edit Level use the Ch and LU buttons to modify the parameter Press ENTER to save your selection The parameter takes effect and returns you to the Status Level 5 16 ENTER USER PRESETS FACTORY RESET Il Model DP562 User s Manual Setup To exit User Presets e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 13 Contrast Adjust Contrast Adjust changes the viewing quality of the liquid crystal display TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU ENTER ENTER CONTRAST AD
30. Dolby Model DP562 Multichannel Dolby Digital Dolby Pro Logic Decoder User s Manual Issue 3 Part No 91470 Model DP562 User s Manual Dolby Laboratories Inc Corporate Headquarters Dolby Laboratories Inc 100 Potrero Avenue San Francisco CA 94103 4813 Telephone 415 558 0200 Facsimile 415 863 1373 www dolby com European Headquarters Dolby Laboratories Wootton Bassett Wiltshire SN4 8QJ England Telephone 44 1793 842100 Facsimile 44 1793 842101 If you purchased the Model DP562 through a dealer or systems integrator please contact them for technical support DISCLAIMER OF WARRANTIES Equipment manufactured by Dolby Laboratories is warranted against defects in materials and workmanship for a period of one year from the date of purchase All warranties conditions or other terms implied by statute are excluded to the fullest extent allowed by law LIMITATION OF LIABILITY It is understood and agreed that Dolby Laboratories liability whether in contract in tort under any warranty in negligence or otherwise shall not exceed the cost of repair or replacement of the defective components and under no circumstances shall Dolby Laboratories be liable for incidental special direct indirect or consequential damages including but not limited to damage to software or recorded audio or visual material or loss of use revenue or profit even if Dolby Laboratories or its agents have been advised orally or in writing of the possi
31. Edit Level is defined by a black solid flashing cursor 4 Once in the Edit Level use the T and J buttons to select an option The adjustment takes effect as soon as ENTER is pressed 5 Usethe t and BA buttons to scroll to ESCAPE Press ENTER to return to the User menu 4 7 Output Activity LEDs Six LEDs located to the right of the 14 front panel buttons indicate the digital output unity gain output from the DSP activity level for each channel Left Center Right Left Surround Right Surround and Subwoofer LED activity Off Input not present or not selected for playback in listening mode Yellow Input present and selected for playback in listening mode Green Signal present with a level above 60 dBFS Red Signal present with a level above 0 1 dBFS clipped NOTES Ls and Rs LEDs will illuminate simultaneously to indicate the presence of mono surround channel in Pro Logic decoded signal The SW LED will indicate the potential for audio if Bass Redirection is appropriately applied even if the LFE input channel has not been selected 4 8 Dim Pressing DIM attenuates all analog outputs by 20 dB Headphone and digital outputs will not be affected For an explanation of Status Level and Edit Level refer to Section 5 of this manual 4 8 Model DP562 User s Manual 4 9 Status Mode Operation As mentioned in Section 2 once the system has completed its power up sequence the DP562 is pla
32. JUST puse yl CONTRAST ADJUST 4 ENTER DODOLBY DIGITAL CONTRAST ADJUST oa DOLBY DIGITALE 4 ENTER CONTRAST ADJUST ESCAPE MENU NAVIGATOR To adjust contrast NOTE If you are not in the Setup mode press SETUP 1 Scroll through the Setup menu using the T and J buttons to find Contrast Adjust 2 Select Contrast Adjust by pressing ENTER This enters you into the Status Level Use the f and RA buttons to scroll to other status information or to return to the previous menu level 3 Press ENTER again to initiate the Edit Level The Edit Level is defined by a black flashing cursor 4 At the Edit Level use the Ch and RA buttons to adjust the contrast Press ENTER to save your selection The parameter takes effect and returns you to the Status Level To exit Contrast Adjust e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 17 Model DP562 User s Manual Chapter 6 Future Software Upgrades The DP562 can be upgraded to the latest Dolby Digital AC 3 decoding algorithm and user interface features via the rear panel serial I O port connected to a personal computer 6 1 Personal computer with an RS 232 port capable of communication at 9600 b s A 9 pin D connector and cable to connect the computer and DP562 An upgra
33. LFE channel is not included When decoding Dolby Digital bitstreams if LFE MONITOR MODE in the setup section is set to AUTO factory default the Low Frequency Effects LFE channel will be muted when Stereo or Mono listening modes are selected In addition LFE channel information is never distributed or downmixed to any other speakers when Pro Logic decoding is selected LFE channel information may only be distributed to the front left and right speakers when appropriate bass management is selected in the setup menu NOTE The Pass through mode supports Stereo factory default and Mono listening modes and two channel outputs The combination of the defined listening mode the input bitstream audio coding mode and the active decoding mode determine the output downmix mode 4 3 Model DP562 User s Manual Operation 4 4 Compression Modes With Dolby Digital or Dolby Digital Dolby Pro Logic decoding the following compression modes are valid e None A professional mode No compression and no dialogue normalization e Custom A professional mode Adjustment of low and high level scaling of dynamic range compression parameters is allowed Enabling and disabling of dialogue normalization are allowed e Line A consumer emulation mode Dialogue normalization always on Adjustment of low level scaling of dynamic range compression parameter is allowed Adjustment of high level scaling of dynamic range compression param
34. Level is defined by a black solid flashing cursor Once in the Edit Level use the T and J buttons to adjust the amount of Boost or Cut The default setting for both is 1 00 The adjustment takes effect as soon as ENTER is pressed Screen For an explanation of Status Level and Edit Level refer to Section 5 of this manual 4 6 Model DP562 User s Manual Operation 4 5 Test Noise The DP562 provides a built in test noise sequencer that you turn on by pressing TEST NOISE on the front panel Enabling TEST NOISE automatically sends a sequence of band limited pink noise 400 1500 Hz or full bandwidth pink noise sequentially to each activated channel at two second intervals The subwoofer channel is always band limited to 20 120 Hz The DP562 retains the current decoding mode when you enable Test Noise The selected listening mode determines the number of channels activated For example if the listening mode is Full the generator will sequence through all six channels If the listening mode is Stereo the generator sequences between the left and right channels only You can also generate test noise for a selected channel Press the SETUP button on the front panel of the DP562 to enable the Setup menu screen Scroll down using the Ch and RA buttons on the front panel to Output Ch Trims and press the ENTER button on the front panel Now select Test Noise Scrolling up or down the output channel trims us
35. NU NAVIGATOR LFE gt L R H OR CNTR SRND gt L RE OR CNTR LFE gt L RE OR SRND LFE gt L R OR Y C S LFE gt L Ri ENTER lt BASS REDIRECTION ENTER X OVER 80 HZ BASS REDIRECTION X OVER 80 HZ ll OR X OVER 100 HZU 5 X OVER 120 HZ Il v BASS REDIRECTION ESCAPE To adjust Bass Redirection please see the following page NOTE Using Bass Redirection adds an additional output delay of approximately 15 ms The Bass Redirection algorithm implements digital fourth order Linkwitz Riley filters Additional filters are used for decimation and interpolation of sample rates 5 13 Model DP562 User s Manual Setup To adjust Bass Redirection NOTE To properly adjust Bass Redirection in the Setup Menu first modify the Bass Redirection option i e CENTER gt L R or SURROUND gt L R etc then select the Bass Redirection Crossover X OVER frequency 1 Scroll through the Setup menu using the T and J buttons to find Bass Redirection 2 Select Bass Redirection by pressing ENTER 3 Press ENTER again to enable the Status Level which displays the current Bass Redirection option default is None You may use the T and J buttons to choose the Bass Redirection X OVER or to return to the previous menu level at this time
36. TER PINK gt TEST NOISE t FILTERED lj ENTER TEST NOISE ESCAPE MENU NAVIGATOR To enable or disable FILTERED Noise NOTE f you are not in the Setup mode press the SETUP button Using the T and J buttons find Test Noise by scrolling through the Setup menu 2 Select Test Noise by pressing ENTER Press ENTER again to toggle between PINK and FILTERED You may also return to the previous menu by using the f and RA buttons Press ENTER to save your selection The parameter takes effect and returns you to the Status Level To exit Test Noise e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 15 Model DP562 User s Manual 5 12 User Presets User Presets saves preset menu parameters for future recall For example you can save setup parameters for different room types or A B listening When a preset is recalled the hardware is immediately configured based on what was saved in that location Selecting FACTORY RESET adjusts the preset parameters back to the factory defaults EDIT LEVEL ENTER TOP LEVEL STATUS LEVEL SETUP MENU ENTER USER PRESETS USER PRESETS RECALL A a MENU NAVIGATOR y USER PRESETS SAVE PRESET A ENTER USER PRESETS RECALL AM OR RECALL
37. TER VEIT M OUTPUT CH TRIMS L SRND 0 0008 y i OUTPUT CH TRIMS SW 0 00dB ENTER ONES M OUTPUT CH TRIMS 4 SW 0 00d ESCAPE To adjust Output Channel Trims NOTE If you are not in the Setup mode press SETUP 1 Scroll through the Setup menu by pressing the T and J buttons to find Output Ch Trims 2 Select Output Ch Trims by pressing ENTER This enters you into the Status Level 3 Usethe Ch and LU buttons in the Output Ch Trims menu to find the audio channel to be adjusted or to loop back to the previous menu 4 Press ENTER after you have selected the channel This initiates the Edit Level The Edit Level is defined by a black solid flashing cursor 5 At the Edit Level use the T and J buttons to adjust the output trim of that particular channel The parameter takes effect as soon as the f and RA buttons is pressed NOTE Holding down the or 4 buttons for three seconds in the Edit Level enables speed scrolling 6 Press ENTER to return to the Status Level Model DP562 User s Manual Setup To exit Output Ch Trims e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 3 Assign Channels The Assign Channels feature allows you to assign one audio channel to any one of the output connectors Ch 6 in both analog a
38. all speakers play back at the same level is very important For proper calibration it is necessary to use a sound pressure level SPL meter when measuring a particular playback level By correctly calibrating your mixing and playback monitor system so that dialogue levels are at universally referenced listening levels you will know that your mix will be roughly at the same volume as other productions upon playback 3 2 Playback Levels Use an SPL meter and the built in Pink Noise Generator to set your system s playback level to a particular reference level There are three options to adjust monitor system playback levels e Amplifier gain trim controls e Mixer s group outputs one for each of the L C R Ls Rs and Sw channels e DP562 s Output Level Trim controls only if using the analog outputs The best option is to use your amplifier gain controls to set proper playback levels This option allows you to maintain optimum signal to noise performance from the DP562 and your mixer If you decide to use either the console s group outputs or the DP562 s Output Level Trim controls then both may sacrifice signal to noise ratio Use an SPL meter and the built in Pink Noise Generator to set your system s playback level to a particular reference level Pink noise readings depend on the type of meter used to set level and strictly speaking on the bandwidth of the pink noise signal In film practice pink noise level is read with a true VU mete
39. and Dolby Digital The presence of Dolby Pro Logic decoding in millions of home theater systems has fostered a high demand for Dolby Surround encoded programming from TV shows to video games Any conventional stereo or mono program can carry surround encoded Left total Lt and Right total Rt tracks which can be played back in conventional stereo without loss of information or through a Dolby Pro Logic decoder to reconstruct the original left center right and surround channels The DP562 s Pro Logic decoder Figure A 2 incorporates an adjustable surround channel delay 15 75 ms with a 20 ms default that takes advantage of the Haas effect This reduces the audibility of front channel information that might leak into the surround speakers Limiting surround channel bandwidth to 7 KHz minimizes leakage of high frequency surround information into the front channels due to azimuth error OUTPUTS INPUTS L L L R LO Left Lt O R SCH Balance O Right Input NC C c Master Balance H Volume Center Trim O Center Adaptive Control Matri S Control atrix O Le pt inis O Surround S 7 kHz Modified Noise Anti alias Audio Time Low Pass Dolby Sequencer Filter Delay Filter 8 Type NR Decoder Figure A 2 Dolby Pro Logic decoder block diagram The Haas Effect states that if two
40. annel and the surround channel should arrive at the listening position a fraction of a second before the surround channels This takes advantage of the Haas effect also known as the precedence effect When two similar sounds arrive at our ears at slightly different times our brain tends to focus on the sound arriving first and ignore the second Dolby Surround takes advantage of this effect to reduce the perceived crosstalk between the front and rear channels A time arrival difference of 10 20 milliseconds is adequate to achieve this effect 3 7 Model DP562 User s Manual Calibration Because Dolby Digital is a discrete system there is no crosstalk between channels The delay times required for Dolby Digital are therefore different from Dolby Pro Logic although related DP562 surround delays are set up separately for Dolby Pro Logic and Dolby Digital while the setup for the center delay is the same for both modes Surround Delay for Dolby Pro Logic To calculate the required delay in Dolby Pro Logic mode you need to measure the distance from your referenced listening position to each of the five speakers e Left speaker L e Center speaker C e Right speaker R e Left surround speaker Ls e Right surround speaker Rs Make all of these measurements in feet If measuring in meters then multiply the metric measurements by three to get the approximate distance in feet The required delay settings for t
41. anual Operation If you prefer to select the Dolby Digital mode manually set Bitstream Detect to DISABLED in the Setup menu Next press DOLBY DIGITAL on the front panel The Dolby Digital LED illuminates steadily signifying that the Dolby Digital mode is enabled Pressing the button again disables the Dolby Digital decode mode WARNING When Bitstream Detect is set to DISABLED and the Dolby Digital mode is not selected the unit will output un decoded audio to the outputs at full scale if a Dolby Digital bitstream is present If the playback level is very high you risk damaging your speakers or possibly your hearing NOTE When Bitstream Detect is set to SILENT SWITCH with a 48 kHz clock input approximately 7 ms of buffering is implemented with AES EBU and approximately 20 30 ms with SPDIF The minor delay is necessary to minimize audio artifacts while switching between Dolby Digital and PCM 4 2 2 Dolby Pro Logic Mode Select Dolby Pro Logic decoding by pressing DOLBY PRO LOGIC when a Dolby Surround encoded PCM signal Lt Rt is present at the input of the DP562 The dedicated Dolby Pro Logic LED illuminates to indicate that the mode is enabled ensure that the Dolby Digital LED is off The DP562 decodes the incoming Dolby Surround encoded program to left center right and surround outputs Pressing DOLBY PRO LOGIC again disables the Dolby Pro Logic mode 4 2 3 Dolby Digital Dolby Pro Logic Mod
42. ays for Dolby Digital is similar in concept to Dolby Pro Logic but with some important differences Since Dolby Digital delivers discrete signals for each channel there is no leakage or crosstalk between channels There is no need to delay the surround channels to take advantage of the Haas effect precedence effect The surround and front channel signals should arrive at listening position at the same exact time coincident arrivals The DP562 Dolby Digital mode consequently uses approximately 15 milliseconds less delay than the Dolby Pro Logic mode for the same speaker and seating geometry Surround channel delay can be adjusted at increments of one milliseond To calculate the surround delay for Dolby Digital measure the distance from your listening position to each of the three speakers e Left speaker L or Right speaker R e Center speaker C e Nearest surround speaker Ls or Rs Make all of these measurements in feet If measuring in meters then multiply the metric measurements by three to get the approximate distance in feet The required delay settings for the room can now be calculated Calculate the delays using the formula below Distance from C Distance from S Surround delay for Dolby Digital S represents the distance from the Left Surround or Right Surround speaker For example if the listener s position is 15 feet from the center speaker and 10 feet from the surround speakers the delay setting
43. bility of such damages Dolby and the double D symbol are registered trademarks of Dolby Laboratories c 1999 Dolby Laboratories Inc Issue 3 S99 11782 12148 Part No 91470 Software Version 2 5 Model DP562 User s Manual Table of Contents Resulatory ee Chapter 1 Introduction and Pre Installation d About ThS Mal cS 1 2 About the Dolby Model DP5632 2 5 3 RD did 1 3 Specifications and Block Di gr m inis ls System Block Diarra ini iii 1 4 Controls and Connectors suecia diia idad da 1 5 3PresInstallatioti s so bocas e S Dod ce i is 1 6 Fusing InfOFTidt DI ioo dett qi ei eso qux ede ede AA eee ees Chapter 2 Installation SE We et 22 Audio e e EE 22A Digital LE EE EE 2 2 2 AES EBU Re 22 Anal g AMMO OULDULS EE 2 Ce REMO trc 2 4 Serial Input Output I O Connections nee 2 5 Headphone deae ete reete d i ies e Die data 205 E biais Zur Betault Values EEN Pe Jol gt AAA ea A iea atana 2 7 2 Defaults in Setup Menu coa o teet ene be vetta beide ba dri beds Chapter 3 Calibration 3 1 Importance of Calibration E 3 Playback EE 3 2 1 Sound Pressure evel Meteo 3 2 2 Taking a First Measurement ote ec devo ral tie IR etas 3 2 3 Bass Redirecton ri ii 3 3 Individual Channel Calorias 3 3 1 Main Channel buie neo did dead A OT 3 3 3 Time Delays for Surround and Center Channels ss Chapter 4 Operation 4 1 4 2 4 3 Navigation and Enter Buttons DECO Mo
44. ced into Status mode The Status menu which is shown in the front panel LCD displays any AES EBU digital bitstream information according to the ATSC Digital Audio Compression Standard To view the most current ATSC standards please refer to our web site www dolby com under the Technical Information link 4 9 1 Status Screen for A Valid Dolby Digital Bitstream with or without Dolby Pro Logic Enabled When valid Dolby Digital information is present in the AES EBU bitstream the initial status screen in Figure 3 1 is displayed on the LCD In addition the Status mode displays several other bitstream parameters that convey information about how the program was prepared by a Dolby Digital encoder The following diagrams depict the status screens of the DP562 The f and RA buttons scroll through the parameters A B represents the bitstream audio coding mode A represents the number of front channels and B represents the number of surround channels L indicates whether the LFE channel is present DDD stands for the data rate in kb s R represents the currently selected Dolby Digital bitstream IEC 1937 AC3 INPUT STATUS A BL DDD SS NN Dolby Digital Parameters NN indicates the dialog normalization level in dB in dB relative full scale SS denotes the sample rate in kHz Figure 4 1 Initial status screen for a valid Dolby Digital bitstream The following table lists all eight bitst
45. ceed to Fusing Information below Fusing Information A WARNING To reduce the risk of fire replace fuses only with the same type and rating 1 6 1 The DP562 uses a universal switching power supply that handles the full range of nominal mains voltages between 90 VAC and 264 VAC and any frequency between 50 Hz and 60 Hz Check Main Fuse 1 With a small flat blade screwdriver open the fuse compartment door in the AC power input housing as shown below in Figure 1 1 METAL CLIP INSTALLED ON UNUSED SIDE OF CARRIER C TOP A SR d ry et CARRIE A AE ACTIVE S INSTALL FUSE FUSE 4 MT i Figure 1 1 Check Main Fuse 2 Check that the fuse in the active lower fuse carrier is of the correct rating The fuse carrier must be inserted into the compartment with the orientation as shown Do not force the carrier into the compartment Damage will result 3 Snap the fuse compartment door closed Model DP562 User s Manual Introduction and Pre Installation 1 6 2 1 6 3 Internal Fuse The switching power supply contains a separate fuse Most fault conditions are protected by the main fuse The internal fuse rating is 2 Amp 250V 20 mm fast blow all operating voltages Internal Signal Ground to Chassis Link J13 open It is normal practice to connect signal ground to power line ground for safety and other reasons In most systems minimum induced hum is obtained when this connection is made at only
46. ck flashing cursor 4 Once in the Edit Level use the T and 1 buttons to adjust the Headphone Mode to STEREO or MONO 5 Press ENTER after you have selected the mode you want The mode takes effect and returns you to the Status Level as soon as ENTER is pressed Use the M and RA buttons to scroll to other status information or to return to the previous menu level To exit Headphone Mode e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 7 Model DP562 User s Manual Setup 5 6 Bitstream Detect Bitstream Detect enables or disables automatic Dolby Digital AC 3 bitstream detection When set to REFERENCE or SILENT SWITCH if a valid IEC 1937 formerly IEC 958 Annex B input stream is present the decoder automatically detects and decodes a Dolby Digital bitstream If the IEC 1937 stream is not present the decoder assumes the input bitstream to be PCM The Dolby Digital LED will flash at a periodic rate to indicate that the DP562 is in one of the automatic bitstream detection modes and that no valid Dolby Digital stream is present If DOLBY PRO LOGIC is selected while in automatic bitstream detection and the input is a valid Lt Rt AES EBU digital audio then Pro Logic is decoded Bitstream Detect has three modes e Select DISABLED to manually select either Dolby Digital or PCM decoding modes e Sele
47. ct REFERENCE to enable automatic bitstream detection without adding any additional decoding delay When using this mode audio clicks may occur when switching between Dolby Digital and PCM e Select SILENT SWITCH to enable automatic bitstream detection but minimize audio artifacts while switching between Dolby Digital and PCM When Bitstream detect is set to SILENT SWITCH extra buffering is implemented in both Dolby Digital and PCM This buffering is necessary to allow more seamless transitions from PCM to Dolby Digital or Dolby Digital and PCM TOP LEVEL STATUS LEVEL EDIT LEVEL ETUP MEN Bite aean Ii ENTER ENTER gt BITSTREAM DETECT ENTER REFERENCE NP BITSTREAM DETECT 1 REFERENCER amp ENTER BITSTREAM DETECT OR ESCAPE Y BITSTREAM adl MENU NAVIGATOR SILENT SWITCH 4 OR y BITSTREAM DETECT DISABLEDE 5 8 Model DP562 User s Manual Setup To enable or disable Bitstream Detect NOTE f you are not in the Setup mode press SETUP 1 Find Bitstream Detect by using the T and J buttons to scroll through the Setup menu 2 Press ENTER to select Bitstream Detect Use the T and J buttons to view the current parameter or to return to the previous menu level 3 Press ENTER again to toggle between DISABLED REFERENCE and SILENT SWITCH and return to the Status Level WARNING When Bi
48. cy with respect to the first word of the Dolby Digital frame which is the reference point Table B 1 SMPTE specified Latency Sample Rate Decoder latency with respect to reference point 48 kHz 32 ms 44 1 kHz 34 83 ms 32 kHz 48 ms B 1 1 DP562 Delay with respect to SMPTE specification Table B2 shows the DP562 excess delay with respect to the latency specified in the SMPTE Standard Table B 2 DP562 additional delay with respect to SMPTE AESS specified latency Disabled and Sample Rate Reference Detect Silent Switch Mode Modes 48 kHz 0 ms 6 6 ms 44 1 kHz 0 87 ms 8 0 ms 32 kHz 0 4 ms 10 3 ms B 2 IEC 61937 Specification consumer SPDIF Like the SMPTE professional specification the IEC consumer specification also describes placement of the Dolby Digital frame on the SPDIF interface such that a decoder with the specified latency will produce correctly timed audio The specified decoder latency is exactly one Dolby Digital block period with respect to the reference point Note that since there are 6 blocks in a frame the latency specification is for 1 6 of a frame time or the time span of 256 audio samples In the IEC specification the reference point is defined as the point 2 3 of the way through the frame of Dolby Digital data Since the frame size depends on the data rate the reference point follows the beginning of the frame by a variable amount based on the data rate B 2 Mod
49. de software disk provided by Dolby Laboratories when a new release becomes 6 2 l Equipment Needed Software Upgrade Connect the computer to the DP562 serial I O port A CAUTION Do not connect the computer to the Status Remote port X Lal Com Port 1 or Com Port 2 er Digital Audio Outputs 1 Ch 1 2 Ch 3 4 Ch 5 6 Model DP562 Multichannel Dec on Gu d Status Remate Oo o o0 ooooo 9 9 O soco pn ne erial VO ih View of DP562 Rear Panel Press SETUP to enter the Setup menu Scroll through the Setup menu and select User Presets Under User Presets choose FACTORY RESET While the unit resets press down and hold the ENTER button until the following message appears DO MODEL DP562 READY TO LOAD 6 1 Model DP562 User s Manual Future Software Upgrades 5 Follow the instructions provided with the software upgrade that will appear on the computer When the computer indicates that the software installation is successfully completed the computer will automatically reboot the DP562 To verify that the proper software is loaded compare the revision level indicated on the software distribution disk to the display during a power on reset 6 Next aseries of messages appear on the DP562 display The messages depend upon the software module being loaded and may appear in any order X MODEL DP562 LOADING HC11 Or LOADING BOOT Or LOADING DSP1 Or
50. des cs ied cde e en d p A EE d dicem ae 424 Dolby Digital Medeae cussed A dte pd Deo a din 4 22 Dolby Pro Logic Mode onec t ett te eret E ences 4 2 3 Dolby Digital Dolby Pro Logic Mode een 44 Pass througli Mode iens io Marce t a ep ric M PU e edet Listening Modes DOWD cen br epic tit Model DP562 User s Manual AA Compression Modest debebit ae 4 4 4 4 1 Custom Compression Setup 4 5 4 4 2 Lime Compression Setup ii dis 4 6 e WE Te 4 7 AG Gcrm 4 7 dp Output Activity LEDS c oie itii dus died 4 8 LE EP PME Tu Em 4 8 Z0 tatus MOGdE aiio Sap saddest on e sei cod Wiss tfta 4 9 4 9 1 Status Screen for A Valid Dolby Digital Bitstream esses 4 9 4 9 2 Status Screen for PCM Dolby Pro Logic or Invalid Bitstream 4 13 4 10 Runtime Fault Messdgesica ene Ne bee toe eine oii em d eap Seeche 4 14 Chapter 5 Setup 5 l Master Level Adjust eee ta 5 2 35 2 S o UU Ch TMS t PEE 5 3 O e a E a E 5 4 2E LEE Monitor Made a li ae 5 6 Day Headphone Modes iet pe a Dri co ate tuba ee a teo ENESES 5 7 5 6 Bitstream Detection oed i edi tiec disti edesideusdas 5 8 Su SEB EWC Select coepisti dE 5 10 Dr Stream Select s ad ac she qi e eee eG itai 5 11 5 94 SRND CNTR Delay AAA ASAS 5 12 5 10 Bass Redirection edel de eei ea ed e rape ai iieri ren asiaa 5 13 DLL Test INOISe dadas 5 15 5 12 User Presets eo ee es e a a a ES Ere s een Eite i
51. e Mixing Level indicates the absolute MIXING LEVEL acoustic sound pressure level of an NNN dB SPL individual channel during the final audio mixing session The peak mixing level range is from 80 to 111 dB SPL Not Present im di Model DP562 User s Manual ROOM TYPE Not Indicated or Large or Not Present COPYRIGHTED YES El or ORIGINAL STREAM YES or TIME CODE 00 00 00 00 CRC ERRORS AC3 N Operation Room Type indicates the type and calibration of the mixing room used for the final audio mixing session The DP562 does not use this parameter for decoding it is simply information for the user Copyrighted indicates that the content of the stream is copyright protected Original Bit Stream identifies whether the stream is an original or a copy Time Code represents the SMPTE time stamp Ifa CRC Error is found in the AC 3 bitstream N represents the number of CRC errors found AC 3 logs Dolby Digital CRC Errors NOTE To reset the CRC Error log press ENTER 4 12 Model DP562 User s Manual Operation 4 9 2 Status Screen for PCM Dolby Pro Logic or Invalid Dolby Digital Bitstream When information other than Dolby Digital is in the AES EBU bitstream one of several parameters shown below may be displayed on the second line of the liquid crystal display AES EBU STATUS No AES EBU Input or Bitstream sample rate 48kHz SampRate o E Bitstream sample rate 44kHz
52. e To manually decode in the Dolby Digital Dolby Pro Logic mode set Bitstream Detect to DISABLED in the Setup menu and press DOLBY DIGITAL and DOLBY PRO LOGIC Both Dolby Digital and Dolby Pro Logic LEDs illuminate To automatically decode in the Dolby Digital Dolby Pro Logic mode when Dolby Digital bitstream is present set Bitstream Detect to REFERENCE or SILENT SWITCH and press DOLBY PRO LOGIC The Dolby Digital LED will illuminate only when a Dolby Digital input is detected while the Dolby Pro Logic LED will illuminate steadily The Dolby Digital Dolby Pro Logic mode is automatically selected if Dolby Surround is indicated flagged in a Dolby Digital 2 channel 2 0 bitstream When the Dolby Digital Dolby Pro Logic Mode is enabled the bitstream is first decoded in the Dolby Digital mode in a Lt Rt PCM bitstream This bitstream is then decoded in the Pro Logic mode and directed to the analog and digital outputs For example if 3 2 material is present in the bitstream the Dolby Digital decoder downmixes to 2 0 Lt Rt before it passes through the Dolby Pro Logic decoder to the outputs NOTE When the Listening mode is set to Stereo Lt Rt is present on the left and right analog and digital output connectors If Bitstream Detect is set to REFERENCE or SILENT SWITCH the Dolby Digital LED will flash periodically when no valid Dolby Digital bitstream is present at the input
53. e Status mode 5 5 Model DP562 User s Manual Setup 5 4 LFE Monitor Mode Low Frequency Effects Monitor Mode allows you to select whether you want the incoming LFE channel to pass through to the subwoofer output Select ON to allow the incoming LFE channel to pass through to the subwoofer output Select OFF to disallow the incoming LFE channel to pass through Select AUTO SELECT to allow the decoder to automatically determine the LFE function through both the audio coding mode set in the original bitstream and the selected decoding mode In AUTO SELECT LFE monitoring is enabled only during the Dolby Digital mode and when Full 3 Stereo or Phantom listening mode is selected LFE monitoring mode is disabled in all other decoding and listening modes This mode is designed to best represent how a consumer decoder will work TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU ENTER ENTER De LFE MONITOR MODE AUTO SELECT ENTER ES l KA gt LFE MONITOR MODE AUTO SELECT LFE MONITOR MODE ES ESCAPE MENU NAVIGATOR A OR To adjust the LFE Monitor Mode NOTE If you are not in the Setup mode press SETUP 1 Press the T and J buttons to find LEE Monitor Mode by scrolling through the Setup menu 2 Select LEE Monitor Mode by pressing ENTER This initiates the Status Level 3 Press ENTER again to get into
54. e program For music mixing each speaker channel should be set to the same SPL the same as television mixing There is no standard practice for reference levels for music mixing Some engineers prefer to mix louder than others do but if the levels between channels are correct the overall level is not as important However as stated previously consideration of the typical consumer listening level is always good practice When mixing for television or music in small mixing rooms i e remote recording trucks the surround channel is generally set 2 dB lower than the front channels for example 80 dB in front and 78 dB in back This takes into account the short distance to the surround speakers Experience has shown that this setting makes the sound in the home environment very close to the sound heard by the mixer 3 2 1 Sound Pressure Level Meter To properly calibrate speaker levels an SPL meter is necessary A suitable and relatively inexpensive meter is readily available from Radio Shack Tandy Electronics outside of North America Since the relative level between channels is more important than absolute level the accuracy of this meter is sufficient for channel balancing An inexpensive meter can be left in the control room for quick level checks 3 2 2 Taking a First Measurement 1 Before you turn on the internal Pink Noise Generator be sure that your playback system has been set to a moderate listening level Adjust your am
55. el DP562 User s Manual Latency Values Table B3 shows the latency specified by IEC 61937 with respect to the beginning of the Dolby Digital frame on the SPDIF interface Table B 3 IEC 61937 specified latency with respect to beginning of data burst Data Rate Sample Rate 48 kHz Sample Rate 44 1 kHz Sample Rate 32 kHz 56 kbps 6 11 ms 6 65 ms 9 17 ms 64 kbps 6 22 ms 6 77 ms 9 33 ms 80 kbps 6 44 ms 7 01 ms 9 67 ms 96 kbps 6 67 ms 7 25 ms 10 00 ms 112 kbps 6 89 ms 7 49 ms 10 33 ms 128 kbps 7 11 ms 7 74 ms 10 67 ms 160 kbps 7 56 ms 8 22 ms 11 33 ms 192 kbps 8 00 ms 8 70 ms 12 00 ms 224 kbps 8 44 ms 9 19 ms 12 67 ms 256 kbps 8 89 ms 9 67 ms 13 33 ms 320 kbps 9 78 ms 10 64 ms 14 67 ms 384 kbps 10 67 ms 11 61 ms 16 00 ms 448 kbps 11 56 ms 12 57 ms 17 33 ms 512 kbps 12 44 ms 13 54 ms 18 67 ms 576 kbps 13 33 ms 14 51 ms 20 00 ms 640 kbps 14 22 ms 15 48 ms 21 33 ms B 2 1 DP562 Delay with respect to IEC 61937 specification for disabled or reference detect modes Table B4 gives the additional delay of the DP562 with respect to IEC 61937 when the DP562 is in Disabled or Reference Detect modes The values shown indicate that the audio output of the DP562 is some milliseconds late compared to an ideal decoder that exactly meets the IEC 61937 specification Table B 4 DP562 additional delay with respect to the IEC 61937 specified latency for Disabled or Reference Detect modes
56. enter channel signal to bring it into acoustic alignment with the left and right speakers This will electronically move the speaker to its proper position in the room For example if Distance C is two feet less than Distance L center delay should be set to two milliseconds If Distance C is two feet more than Distance L center delay should be set to 2 milliseconds The center channel delay range is 3 to 5 milliseconds in one millisecond steps To make the C time delay negative the decoder is actually setting C delay to zero and adding delay of up to three milliseconds to the left right left surround and right surround outputs This keeps the surround and front arrival times aligned To set the Center delay 1 Press SETUP on the front panel This takes you to the Setup menu 2 Scroll down the Setup menu using the J button Select Srnd Cntr Delay and press ENTER 3 Using the Ch and 4 buttons scroll through the Srnd Cntr Delay menu until you find Center 4 Press ENTER then use the f and BA buttons to dispay the correct delay value in milliseconds Press ENTER again to save the adjustment 5 Press SETUP to exit the Setup menu and to return to normal operation 3 10 Model DP562 User s Manual Chapter 4 Operation 4 1 Navigation and Enter Buttons The 1 and RA buttons enable you to navigate through the Status menu and other menu screens shown in the liquid crystal display LCD of the DP562 Pressing do
57. epared specifically to help you get the most from the DP562 and includes the proper steps to follow before operating the DP562 in order to take advantage of all of its features We suggest that you keep this manual readily available for reference Two additional manuals Dolby Digital Broadcast Implementation Guidelines Part No 91549 and Dolby Digital Professional Encoding Manual Part No 91535 provide in depth operational details for specific applications Contact your dealer or Dolby Laboratories for availability Advanced Television Systems Committee ATSC specifications are often referenced in this manual to explain methods of standardization applied to the DP562 You can find a link to the ATSC A 52 Annex B specification under Technical Information at our Web site www dolby com or you can link directly to www atsc org and select standards Conventions The DP562 User s Manual employs the following conventions e The term AC 3 in figures and tables refers to Dolby Digital e Warning and Note annotations contain important information specific to the text that it follows Examples WARNING Check that the correct fuses have been installed To reduce the risk of fire replace the fuses only with the same type and rating NOTE Both audio pins of the XLRs pins 2 and 3 must be connected neither may be left open e The DP562 controls are represented by bold faced capital letters enclosed in brackets
58. ers However when these programs are reproduced with downmixing enabled or at reduced listening levels it is important to preserve as much of the program content and the producer s original intent as possible Downmixing and dynamic range compression aid in this task while the dialogue normalization feature helps unify the subjective listening level of all programs Two variables within the Dolby Digital bitstream dynrng and compr provide automatic gain control in the decoder based upon information developed during the Dolby Digital encoding process Dynamic range compression information represented by the variable dynrng is useful for situations such as late night viewing of programs with a wide dynamic range or for program material that needs significant compression for improved coverage and intelligibility Dynrng also provides the peak limiting required during downmixing to avoid peak level overload Compr the variable for heavy compression provides peak limiting only and is used as an extra measure of protection against peak level overload when the audio signal must follow an RF remodulation path for playback or for late night listening when the least amount of dynamic range lower signal peaks to dialogue is desired Encoding dynamic range information into a Dolby Digital bitstream allows you to customize compression levels in the listening environment to suit your needs as well as automatically providing for reduced dynamic range where app
59. eter is allowed except during downmixing factory default e RF A consumer emulation mode Dialogue normalization always on Dynamic range compression and heavy compression always on Adjustment of low and high level scaling of dynamic range compression parameters is not allowed See Appendix C for a detailed description of dialogue normalization dynamic range compression Line RF and Custom compression modes NOTE For None and Custom compression mode an 11dB attenuation is applied during downmixing to protect against saturation conditions You are responsible for providing the gain to bring the signals back to normal levels if utilizing digital outputs The 11dB attenuation is recovered in analog outputs 4 4 Model DP562 User s Manual 4 4 1 Custom Compression allows you to enable or disable dialogue normalization and adjust hi level cut and low level boost compression parameters TOP LEVEL COMPRESSION MENU CUST COMPRESSION MENU NAVIGATOR To adjust the parameters in the Custom menu 1 Press CUSTOM for three seconds until the Custom menu appears on the LCD screen You can escape from this menu and return to the Status screen by either 1 waiting for ENTER gt Custom Compression Setup STATUS LEVEL CUST COMPRESSION DIALN ENABLED EDIT LEVEL A Y CUST COMPRESSION BOOST 1 00 ENTER CUST COMPRESSION DIALN DISABLED A v
60. gh Cut Low Boost Dialogue Normalization Scaling Scaling Reproduced At On chip Allowed Allowed No No No Adjusted in analog hardware Custom Selectable Yes Yes 31 dBFS 42 dBFS if downmixing if dialogue normalization enabled adjusted in hardware if disabled Line Yes Yes if NOT Yes 31 dBFS downmixing Yes No No 20 dBFS in RF remodulated outputs Model DP562 User s Manual Dynamic Range Compression Dialog Normalization amp Downmixing for Dolby Digital C 3 Dialogue Normalization The audio signals from Dolby Digital transmissions include known dialogue reference levels referred to as Dialogue Normalization The dialogue normalization feature essentially corrects for variations in subjective program loudness and may vary gain from just a few dB to as much as 12 dB typically although more than 20 dB is possible The purpose of dialogue normalization is actually twofold 1 to ensure that different programs are reproduced at the same subjective loudness 2 to ensure that the dialogue levels remain constant no matter what operational mode is being used C 3 1 Dialogue Normalization Across Programs Consumers receive audio video signals from a variety of sources Traditionally based on analog delivery audio signals are typically normalized to their peak values to maximize dynamic range through the transmission and recording media Digital formats are changing the way programs are normalized because it is no longer difficult to
61. he 11 dB boost in an RF remodulated output dialogue would be reproduced at 20 dBFS By setting a maximum of 20 dB of headroom above dialogue overmodulation of television receivers is protected The DP562 however does not apply the 11 dB boost to allow easy comparisons of Line and RF mode compression in either the analog or digital outputs C 2 Model DP562 User s Manual Dynamic Range Compression Dialog Normalization amp Downmixing for Dolby Digital C 2 3 Custom Mode The Custom Mode is a professional listening mode that gives more control over level adjustments The amount of compression that is applied may be scaled down or defeated at any time without restriction In addition dialogue normalization can be enabled or disabled In the DP562 decoder this mode can be useful for example when listening in the Full listening mode for comparing full dynamic range by leaving dialnorm turned on and scaling the cut and boost to 0 0 or off and reduced dynamic range late night listening using the Line Mode Caution must be used however Depending upon how Custom Mode is setup it may not represent either the level balance or dynamic range heard in a consumer decoder Features e Dialogue normalization can be defeated e If dialogue normalization is enabled dialogue is reproduced at a constant level 31 dBFS e Dynrng style compression used e Compression scaling allowed low level boost high level cut adjustment allowed
62. he DP562 is configured as a DCE device Status Remote Input 9 pin female D connector Front Panel Displays Two line by 16 character alphanumeric LCD with back lighting Introduction and Pre Installation Specifications and Block Diagram Six channel Activity Signal Presence LEDs L C R LS RS SW Off input not present and not selected for playback Yellow input present and selected for playback Green signal present with level above 60 dBFS Red signal present with level above 0 1 dBFS clipped NOTE LS and RS illuminate simultaneously to indicate presence of mono surround channel in Pro Logic decoded signal Decoding Modes Dolby Digital Dolby Pro Logic Dolby Digital Dolby Pro Logic and Pass through Listening Modes Full 3 Stereo Phantom Stereo Mono Compression Modes None Custom Line RF Custom and Line modes have adjustable parameters Test Noise Auto Sequences wide band or band limited pink noise through enabled channels at two second intervals Manual Feeds continuous noise to selected channel when unit is in trim level mode Power Requirements 90 264 V AC 50 60 Hz auto sensing 30 W maximum Dimensions and Weight 45 mm x 483 mm x 305 mm 1 75 x 19 x 12 Net 4 9 kg 10 5 Ibs Operating Conditions 5 45 C natural convection cooling 0 90 relative humidity non condensing Regulatory Notices North America This unit complies with the limits for a Class A digital device
63. he program A built in model of auditory masking allows the coder to alter its frequency selectivity as well as time resolution By allowing the coder this kind of flexibility a sufficient number of bits can be used to describe the audio signal in each band therefore ensuring noise is fully masked Dolby Digital also decides how the bits are distributed among the various channels from a common bit pool This technique allows channels with greater frequency content to demand more data than sparsely occupied channels for example strong sounds in one channel provide masking for noise in other channels Dolby Digital s sophisticated masking model and shared bitpool arrangement are essential factors in its extraordinary spectrum efficiency Furthermore where other coding systems have to use considerable and precious data to carry instructions for their decoders Dolby Digital can use proportionally more of the transmitted data to represent audio which means better sound quality Dolby Digital can process 20 bit digital audio signals over a frequency range from 20 Hz to 20 kHz 0 5 dB 3 dB at 3 Hz and 20 3 kHz The low frequency effects channel covers 20 to 120 Hz 0 5 dB 3 dB at 3 and 121 Hz Sampling rates of 32 44 1 and 48 kHz are supported while data rates range from as low as 56 kb s for a single mono channel to as high as 640 kb s for multiple channels A 4 Model DP562 User s Manual Appendix B Latency Values The latenc
64. he room can now be calculated Calculate the delays using the formula below Use the shorter distance to the Left Surround or Right Surround speaker for the value S Distance from C Distance from S 15 Surround delay for Dolby Surround Pro Logic For example if the listener s position is 15 feet from the center speaker and 10 feet from the surround speakers the delay setting for the rear channels will be 20 milliseconds for Dolby Surround Pro Logic See example below 15 Distance from C 10 Distance from S 15 20 Surround delay for Pro Logic The Dolby Pro Logic delay range can be adjusted from 10 to 75 milliseconds in one millisecond steps If your calculation is less than the minimum value available then use the minimum value To set the Pro Logic Surround delay on the DP562 1 Press SETUP on the front panel This takes you to the Setup menu screen 2 Scroll down the Setup menu using the J button Select Srnd Cntr Delay and press ENTER 3 Using the M and LU buttons scroll through the Srnd Cntr Delay menu until you find PL Srnd 4 Press ENTER then use the f and RA buttons to display the delay value in milliseconds Press ENTER again to save the adjustment 5 Press SETUP to exit the Setup menu and to return to normal operation For more information on the Setup menu refer to Section 5 3 8 Model DP562 User s Manual Calibration Surround Delay for Dolby Digital Determining channel del
65. i 5 16 5 13 Contrast AdJUSU TEE 5 17 Chapter 6 Future Software Upgrades 6 1 Equipment Ned ds 6 1 6 2 Software Upgrade viii as 6 1 63 Fault Message Sineto eetoksen errienta e ea Orr a eer ea Aae n eoir 6 3 Appendix A About Dolby Pro Logic and Dolby Digital A Dolby Pro Logis da RR EO RC ERE aaia iS A 1 A2 Dolby Digital O at tien a tates idea eio ehe pf ae ane eee A 3 Appendix B Latency Values B 1 SMPTE Specification professional AR B 1 B 1 1 DP562 Delay with respect to SMPTE specification coooooccnnnnnccononanccnnnnos B 2 B 2 IEC 61937 Specification consumer SPDIB esee B 2 B 2 1 DP562 Delay for disabled or reference detect modes B 3 B 2 2 DP562 Delay for Silent Switch mode eere B 4 B 3 DP562 Latency Absolute delay spectfieaton B 4 B 3 1 DP562 latency for AES3 professional interface ooooonooccconnnnnoncccnnncnononnnnnnos B 4 B 3 2 DP562 latency for SPDIF interface unco pecie eee eee B 5 Model DP562 User s Manual Appendix C Dynamic Range Compression Dialogue Normalization and Downmixing for C 1 C 2 C3 C 4 Dolby Digital Introduction Audio Features ee ipe ei Eee a eden C 1 Operational Modes ucro a Ee o qe e eee du C 2 C2 Line Mode s c A A A A e C 2 C22 CT C 2 RE E Ne TEE C 3 24 No Compression None ide ninia e itti bim ede Up Foie iet C 4 2 5 Summary of Operational Modes dd he eee C 4 Dialogue Normalization hoe oer Ee C 5 C 3
66. ing the T and J buttons test noise PINK or FILTERED will generate from the selected speaker 4 6 User The User menu allows you to assign one of the Setup menu parameters to the USER button The USER button then acts as a shortcut to one of the Setup menu functions listed in the Edit Level below TOP LEVEL STATUS LEVEL EDIT LEVEL USER MENU ENTER USER FUNCTION I USER FUNCTION NONE ENTER gt USER FUNCTION ENTER 4 ENE USER FUNCTION ek M ESCAPE Y REMOTE CONTROL ll MENU NAVIGATOR OR Y AES EBU CH SEL A OR v LFE OUTPUT MODE M A OR Y BITSTREAM DET li A OR Y PINK NOISE Bl NOTE f the menu is enabled and not in use for approximately ten seconds the display will revert to the Status screen 4 7 Model DP562 User s Manual Operation To create a shortcut in the User menu 1 Press USER for three seconds until the menu appears on the LCD screen You can escape from this menu and return to the Status screen either 1 waiting for approximately five seconds or 2 pressing TEST NOISE or SETUP 2 Press ENTER to get into the Status Level and view the current setting Use the f and 4 buttons to scroll through the status or to return to the previous menu level 3 Upon selecting the current parameter press ENTER to initiate the Edit Level The
67. ional Television Standards Committee Pulse Coded Modulation PCM The standard form of uncompressed audio data transmission in which amplitude samples of an analog signal are represented by digital numbers Phantom Information heard from a perceived point between two speakers rather than from the speakers directly Pink noise A noise signal whose spectral power distribution is such that the powers per octave per decade or in any other equal percentage section is the same anywhere across the spectrum For example pink noise has the same power in the octave between 50 Hz and 100 Hz as in the octave between 10 kHz and 20 kHz RF mode A consumer emulation mode with dialogue normalization dynamic range compression and heavy compression always on S PDIF Sony Philips Digital Interface standard also known as Serial Parallel Digital Interface D 3
68. level boost and high level cut parameters in Full listening mode When downmixing low level boost parameters can be adjusted High level cut parameters are automatically fixed by the DP562 to avoid saturation The Line compression Line Compression Setup mode always provides dynamic compression and dialogue normalization To adjust the parameters in the Line menu l NOTE f the menu is enabled but not used for approximately ten seconds the display will revert to the Status TOP LEVEL COMPRESSION MENU LINE COMPRESSION STATUS LEVEL ENTER MENU NAVIGATOR LINE COMPRESSION BOOST 1 00 EDIT LEVEL CUT 1 00 LINE COMPRESSION ENTER LINE COMPRESSION BOOST 1 00 J ENTER I LINE COMPRESSION LINE COMPRESSION ESCAPE CUT 1 00f Press LINE for three seconds until the Line menu appears on the LCD screen You can escape from this menu and return to the Status screen by either 1 waiting for approximately five seconds or 2 pressing TEST NOISE or SETUP Press ENTER to get into the Status Level to view the current parameter settings Use the f and RA buttons to scroll through the menu and select the level you need to modify BOOST or CUT or to return to previous menu level Upon selecting which adjustment you need to make press ENTER to initiate the Edit Level The Edit
69. log output level control 10 dB to 95 dB level trims 6 dB to 18 dB and output channel assignment e Two line 16 character alphanumeric front panel LCD Front panel channel activity indicators e Built in test noise sequence generator for balancing playback system e Adjustable center and surround channel delays e Serial remote control capability e Front panel headphone jack with adjustable level e Custom Dolby Digital compression parameter adjustment e Bass management Model DP562 User s Manual 1 3 Audio Sampling Rates 32 44 1 or 48 k samples second Output sample rate follows input Frequency Response Digital outputs 20 Hz 20 kHz 0 01 dB Analog outputs 20 Hz 20 kHz 0 1 dB Distortion Less than 0 005 20 Hz 20 kHz Dynamic Range Greater than 100 dB Trim Level Adjust 6 to 18 dB in 0 125 dB steps Crosstalk Better than 100 dB 1 kHz Digital Audio Input Dolby Digital AC 3 in IEC 1937 format formerly IEC 958 Annex B as specified in ATSC A 52 Annex B PCM in AES EBU format 3 pin female XLR connector Digital Audio Outputs AES EBU PCM 5 Vpp 110 Q Three 3 pin male XLR connectors Analog Audio Outputs 0 dBFS 24 dBu balanced floating 25 Q output impedance 20 bit DAC 3 pin male XLR connectors Headphone Output 11 5 dBu maximum output into 600 Q nominal 1 4 standard audio headphone jack Level adjustable over 60 dB range Serial UO RS 232 9600 bps 9 pin female D connector T
70. maintain signal quality CDs laserdiscs and even VHS Hi Fi tapes are able to maintain high dynamic range with ease All are used to deliver programs with peak signal levels some 10 to 20 dB above their normal reference levels When these programs are compared to the higher density of conventional television broadcasts they sound as though they are recorded at a lower volume In fact the unlimited program may have signal peaks which far exceed those of the subjectively louder program Figure C 1 compares typical program levels from various sources The heavy marker represents the average dialogue modulation level and the shaded area represents the maximum signal headroom available above that point DSS CD CD LD VHS Hi Fi PREMIUM CLASSICAL POPULAR MOVIE MOVIE MOVIE MUSIC TV MUSIC BROADCAST Figure C 1 Audio levels from various consumer signal sources C 5 Model DP562 User s Manual Dynamic Range Compression Dialog Normalization amp Downmixing for Dolby Digital Figure C 2 shows all the sources normalized for equal listening volume The gains have been adjusted by some 10 12 dB essentially to attenuate the densest sources in order to match the subjective loudness of the sources that are not compressed This allows each program to be decoded at the same subjective loudness so you no longer need to make volume adjustments each time new programs are received DSS CD CD LD VHS Hi Fi PREMIUM CLASSICAL POPULAR TV MOVIE MOVIE
71. n Model DP562 User s Manual OQd 10 eururo 21013 YMM snjejs spueuiuioo IJULYIXI oj ooepioju eios s pouueqo dino orpne Alege 0 pousisseo1 oq ueo 10j ouuoo ouueqo jndino prepuejs pas 0 6TOHI NAA SAV ut peneunoj syndjno Wd pepooeq 9 5 PIC ZIL HO Sindino jeppa MO q 1s8 ulul z WZ osng euU Se ourn HI VI osng WEWN BAYOT 06 JOJIBUUOD SUIEIN OV pu sped aqe eowios een ON MN S J amod Buridde esojeq Bunei esnj xoeuo ONINSVM N ureans 11g o qneduioo 61 DAI NAA SAV uri pojernsdeouo JADd 0991s 10 INOd Pepooue punoung qjoq Tei3rq Aqjoq pepooug indu jeybiq OI leues juouluSisse SMO OJ Statue yndyno eySIp 10 juouiugIsse PUE nap Ob SHEP 0 ye oouepoduur peo xc SIAP sindino So eue pooue eq xig 9 LHO sindino Bojeuy Io o juoo 9 9 jndjno So eue eu191xo ue se uonounj yorga 1ojouronuojod 10j suonoouuo SCAT smejs 2jouio1 JOY suoroouuo 9 0U9yY snjejs sindino oipny Bojeuy Figure 1 2 Rear panel Model DP562 User s Manual Introduction and Pre Installation 1 5 1 6 Pre Installation Unpacking Before unpacking the DP562 inspect the outer carton for shipping damage If the carton shows damage inspect the unit especially carefully in those areas Inspection Carefully remove the unit from its carton remove the plastic wrapping and place on a flat surface If there are no signs of damage pro
72. n the unit The unit must be earthed by connecting to a correctly wired and earthed power outlet The power cord supplied with this unit must be wired as follows Live Brown Neutral Blue Earth Green Y ellow IMPORTANT NOTE DE SECURITE Ce materiel est conforme la norme EN60065 Pour vous assurer d un fonctionnement sans danger et de pr venir tout choc lectrique ou tout risque d incendie veillez observer les recommandations suivantes o Leselecteur de tension doit tre plac sur la valeur correspondante votre alimentation r seau o Les fusibles doivent correspondre la valeur indiqu e sur le materiel o Le materiel doit tre correctement reli la terre o Le cordon secteur livr avec le materiel doit tre cabl de la mani re suivante Phase Brun Neutre Bleu Terre Vert Jaune WICHTIGER SICHERHEITSHINWEIS Dieses Ger t entspricht der Sicherheitsnorm EN60065 F r das sichere Funktionieren des Ger tes und zur Unfallverh tung elektrischer Schlag Feuer sind die folgenden Regeln unbedingt einzuhalten o Der Spannungsw hler mu auf Ihre Netzspannung eingestellt sein o Die Sicherungen m ssen in Typ und Stromwert mit den Angaben auf dem Ger t bereinstimmen o Die Erdung des Ger tes mu ber eine geerdete Steckdose gew hrleistet sein o Das mitgelieferte Netzkabel mu wie folgt verdrahtet werden Phase braun Nulleiter blau Erde griin gelb NORME DI SICUREZZA IMPORTANTE Questa apparecchiatura
73. ncy with respect to the beginning of the Dolby Digital data packet on the SPDIF consumer interface when the DP562 is in Disabled or Reference Detect modes SPDIF latency values are identical to professional latency values in Silent Switch mode For those values refer to the table in B6 above Table B7 DP562 latency for SPDIF interface in Disabled and Reference Detect modes Data Rate Sample Rate 48 kHz Sample Rate 44 1 kHz Sample Rate 32 kHz 56 kbps 7 3 ms 9 ms 12 1 ms 64 kbps 7 4 ms 9 1 ms 12 3 ms 80 kbps 7 7 ms 9 4 ms 12 8 ms 96 kbps 7 9 ms 9 6 ms 13 3 ms 112 kbps 8 1 ms 9 9 ms 13 8 ms 128 kbps 8 3 ms 10 1 ms 14 3 ms 160 kbps 8 7 ms 10 6 ms 15 3 ms 192 kbps 9 2 ms 11 2 ms 16 3 ms 224 kbps 9 6 ms 11 7 ms 17 3 ms 256 kbps 10 1 ms 12 2 ms 18 3 ms 320 kbps 11 0 ms 13 3 ms 20 3 ms 384 kbps 11 9 ms 14 3 ms 22 3 ms 448 kbps 12 7 ms 15 4 ms 24 3 ms 512 kbps 13 6 ms 16 4 ms 26 3 ms 576 kbps 14 5 ms 17 5 ms 28 3 ms 640 kbps 15 4 ms 18 6 ms 30 3 ms B 5 Model DP562 User s Manual Appendix C Dynamic Range Compression Dialogue Normalization and Downmixing for Dolby Digital C 1 Introduction Audio Features Dolby Digital AC 3 tailors audio reproduction to specific needs through it s many built in system features When encoding with Dolby Digital audio programs are encoded with the same degree of spatiality and dynamic range deemed necessary by the content produc
74. nd digital output connectors If you are facing the rear panel the left most position of the row of analog output connectors represents Ch 1 The left most position of the row of digital output connectors represents the first two channels Ch 1 and 2 Figure 5 1 T Analog Audio Outputs ital Audio Outputs 4 Digital Input Multichannel D Uess Uess y Status Remot des Less Ny IG ye ye A IG T9 Son ei Ch Co Oe Os Ke ial VO DE ege Analog Outputs Ch 1 6 Digital Outputs Ch 1 2 3 4 5 6 Figure 5 1 Rear panel When you reassign a channel that channel exchanges its channel number with the desired location For example using the following diagram if you selected CH 1 LEFT and reassigned it to the location of CH 4 RIGHT SRND the Status Level screens will read CH 1 RIGHT SRND and CH 4 LEFT 5 4 Model DP562 User s Manual The default positions for Assign Channels are depicted below TOP LEVEL SETUP MENU ASSIGN CHANNELS ES ES MENU NAVIGATOR ENTER STATUS LEVEL EDIT LEVEL ENTER L R C Sw Ls Rs ENTER CH 1 LEFT L R C Sw Ls Rs A CH1 LEFTM lal y L R C Sw Ls Rs E CH 2 RIGHT ENTER gt L R C Sw Ls Rs a CH 2 RIGH
75. nnels 1 through 6 Digital Input The DP562 accepts encoded Dolby Digital data Dolby Surround encoded PCM or sampled PCM All three types of input signals must be consistent with AES EBU or IEC 1937 formerly JEC 958 Annex B standards Connect the digital source to the DP562 Digital Input connector using a shielded cable with a male XLR connector S PDIF signals can be connected using a 75 Q 110 Otransformer The DP562 decodes sampling rates of 32 kHz 44 1 kHz and 48 kHz AES EBU S PDIF AC 3 PCM 110 Q balanced 3 pin XLR female rear panel connector Digital signal ground Digital audio input Digital audio input PCM Pulse Coded Modulation is a form of data transmission in which digital numbers represent amplitude samples of an analog signal AES EBU is a standard format in accordance with the Audio Engineering Society and European Broadcast Union 2 1 Model DP562 User s Manual Installation 2 2 2 2 2 3 AES EBU Outputs Use balanced and shielded audio cables with female XLR connectors to connect to the AES EBU Digital Audio Outputs Ch 1 2 Ch 3 4 Ch 5 6 AES EBU PCM 5Vp p 110 Q balanced 3 pin XLR male rear panel connector Pin Connection 1 Digital signal ground Digital audio input Digital audio input Analog Audio Outputs Connect the DP562 Analog Outputs Ch 1 Ch 6 to balanced and shielded audio cables with female XLR connectors AES and IEC convention calls for XLR
76. nominal Pin Connection Tip p Left Channel Right Channel Sleeve Common 2 5 Model DP562 User s Manual 2 6 Power Installation Connect the main power cable to the unit to turn on the DP562 Powering up the DP562 begins an initialization sequence First all of the Output Activity LEDs illuminate Next the Output Activity LEDs flash 12 times and the screens depicted in Figure 2 2 appear on the front panel display in sequence Next the output activity LEDs again and the screen displays the input status If a valid Dolby Digital bitstream is present in the decoder the message in Figure 2 3 will display If a source other than Dolby Digital is present at the input the message in Figure 2 4 will display 2 6 f MODEL DP562 MULTI CH DECODER DOMODEL DP562 Soft Ver XXX If MODEL DP562 INITIALIZING Figure 2 2 Power up display The XXX shown in the center figure represents the software version AC3 INPUT STATUS A BL DDD SS NN R Figure 2 3 Input status message with a valid Dolby Digital bitstream The letters beneath the input status represent parameters of the Dolby Digital bitstream Refer to Section 4 9 Status Mode for a list and explanation of all input status messages AES EBU STATUS No AES EBU Input Figure 2 4 Input status message without a Dolby Digital bitstream Installation Model DP562 User s Manual 2 7 2 7 1 2 7
77. ourjop yoy ms reurq urojsn 19asf JUI UNUOJTAUO 19SN enprAIpur 0 z9cq 1 Jo uoneinaruoo soprAoid yorym nuaw dnjog soxoAu 19 u3 nuaw dnjog ur sorquo s e ds1 q sniejs 101131 Kqjoq pue Wod sfejdsiq dnja ap OZ Aq sindino So eue soyenuog y 195 Kejdsig wig Te ep INdjno auoydpeay sporuoo ONUOD too 9913 AP OLT 013409 euinjoA suoydpesH O 9 La TE o O yor guoydpeoy orpne pIepue s p A O e e Be ia ce ZZNNO 8 BY 12 iepooeq jauueuoninyy e ololo s oala a snjelg indu gov AMA 8 uuum o qoa o o uonrpuoo uoneInes SA gp Q Voge peusis poy SA P09 240q eusig 19915 pe qeuuo ouu q MO 9X snjejs ouue qo enprArpur ojeorpur SQA 10 09 L1 sq31 Aianoy indino ATWO ouueqo 19119 QUO JA s ouue qo 0 oul 14819 pue 1397 Lin 001949 Jeuueqo 19097 uojuvud v 318319 3431 y pur yo urojueuq s ouueqo PUNOJINS ou 091939 sjouueqo 1ndur Up jn e qepre A o1e SIPOW xruumop Suruojsi IATA s pow Buua s 7 Controls and Connectors u no1g ssed WOd 91307 o1q pesia Long 91307 o1g Kqioq pensia Kqioq sopour Surpooop INOJ FUO WL 199 98 shay 1opoooegq qiog 1 4 nudum dnjog pue suooi1os snjvjs u3no1g ajestavu shay MOLLY shay 1018 ley nua w V Figure 1 1 Front panel 1 5 Introduction and Pre Installatio
78. pin 2 to be high hot and pin 3 to be low cold In the interest of maintaining international standards we recommend following AES and IEC standards In an installation where the load is unbalanced avoid ground loops by using two conductor shielded cables for balanced circuits Ensure that the unbalanced load occurs only at the DP562 end by connecting pin 3 to ground NOTE Both audio pins of the XLRs pins 2 and 3 must be connected neither may be left open AES EBU 25 ohms output impedance balanced floating 3 pin XLR male rear panel connector Pin Connection 1 Analog Signal Ground 2 2 Model DP562 User s Manual Installation 2 3 Status Remote The Status Remote 9 pin D connector on the rear panel allows remote monitoring of status and remote control of the analog output level When monitoring status remotely the front panel controls continue to operate normally while the analog output level adjustments are disabled and can only be adjusted by closing the remote switch Please refer to the remote circuit example in Figure 2 1 NOTE The output channel trims are adjustable when the remote level controller is enabled The Master Level cannot be adjusted Status Remote 9 pin female D connector on the rear panel Connection Comment Processor memory fault AC 3 PCM 1 AC 3 bitstream O PCM bitstream AC 3 CRC Error AC 3 CRC error encountered during decode AC 3 CRC Error Pins 3 and 4 closed
79. plifiers self powered speakers or mixer only Beware that if the playback level is very high you may risk damaging your speakers or possibly your hearing 2 Press TEST NOISE you will learn more about this button in Section 4 Operation This will cycle pink noise automatically between the Left Center Right Right Surround and Left Surround channels remaining two seconds at each output before moving onto the next If you do not hear pink noise in any of the five main channels as the noise cycles through that channel check your system connections and settings 3 2 Model DP562 User s Manual Calibration 3 Ensure that you are sitting in your normal proper reference listening or mixing position Set the SPL meter to C weighting and slow response 4 Facing the front speakers hold the SPL meter at chest level with the microphone facing up at an angle of approximately 45 degrees to the center speaker Keep the meter at arm s length to prevent measuring audio that may reflect from your body You should be able to take SPL readings as you look down at the meter 5 Keep the SPL meter in this position Make sure that the meter is aimed at the center speaker as you take readings for the left and right speakers 6 When taking the SPL readings for the left surround or right surround speakers keep the meter at the same angle and position as you did for the front speakers Turn your body 90 from the center speaker towards
80. r For future reference if you have set up the level with an RTA measure the level with your SPL meter and take note of the reading You can then use this measured value for quick checks of the subwoofer calibration in the future 3 6 Model DP562 User s Manual Calibration To calibrate the subwoofer 1 Press SETUP on the front panel to enable the Setup menu screen 2 Scroll down using the J button on the front panel to Output Ch Trims 3 Press ENTER 4 Using the Ch and 4 buttons scroll down to SW and press ENTER 5 Press TEST NOISE on the front panel to activate the low pass filtered noise Adjust the trim with the f and RA buttons for the correct level in dB Press ENTER to save the adjustment D 7 To exit the Setup menu and to return to normal operation press SETUP For more information on the Setup menu refer to Section 5 Setup 3 3 3 Time Delays for Surround and Center Channels In addition to setting the proper monitoring levels be sure that the sound from each speaker arrives to your listening position at the correct time To achieve this the delay times of the center and surround channels need to be adjusted Channel delay is determined by calculating the distances from each speaker to the listening position as shown in Figure 3 2 Figure 3 2 Speaker to listener dimensions DIM signifies distance In the case of Dolby Surround Pro Logic a sound common to both the front ch
81. r ears confirm that each speaker sounds equally loud at your reference position and that each speaker plays back at the exact reference level 85 dBC or 79 dBC If there are any discrepancies repeat these steps until everything is properly adjusted 3 5 Model DP562 User s Manual Calibration 3 3 2 Subwoofer The test noise generator uses band limited pink noise for setting the level of the subwoofer The noise signal is low pass filtered at 120 Hz To properly calibrate the subwoofer a real time analyzer RTA is required If an RTA is not available you can approximate the settings with an SPL meter When using an RTA proper alignment of the subwoofer requires setting the subwoofer level 10 dB higher than the center channel level measured within the subwoofer bandwidth typically 25 120 Hz For example measure the center channel average value of each third octave band between 25 120 Hz and set as the 0 dB datum on the RTA display Then adjust the subwoofer level so that the average value of each third octave band between 25 120 Hz is 10 dB higher Subwoofer 10 dB datum Center Channel O dB datum 25 Hz 120 Hz 2 kHz Figure 3 1 Real time analyzer RTA display If an RTA is not available setting the subwoofer channel 4 to 6 dB higher e g 89 91 dB for the subwoofer channel when the center channel measures 85 dB will give an approximate calibration using an SPL meter This level varies with the quality of your mete
82. r or a meter display with a VU characteristic If reference level is specified as 0 VU where 0 VU corresponds to 20 dBFS for a digital recording medium then pink noise should be set to 0 VU on the console meter or meter display and the SPL set accordingly NOTE Many if not most modern consoles have peak reading meters or meter displays Pink noise that reads at reference level using a true VU meter will read from 8 12 dB higher on a peak reading meter or meter display If your console has switchable meter characteristics be sure to select the VU mode when setting pink noise levels 3 1 Model DP562 User s Manual Calibration For film work pink noise at reference level should produce a sound pressure level SPL of 85 dBC for each of the front channels left center and right Each surround channel should produce a sound pressure level of 82 dBC the lower surround level is specific to film style mixing rooms For television work pink noise at reference level is typically set to produce an SPL ranging from 79 dBC to 82 dBC for each of the main five channels The lower reference level for television is due to the lower average listening levels used by the consumer typically 70 75 dBC Since the reference listening level used can dramatically effect the balance and intelligibility of the mix it is important to consider both the level at which a program was mixed as well as the typical listening level in the home for the sam
83. ream audio coding modes A B Encoded Channels 1 1 L Ch 1 R Ch 2 1 0 C 2 0 L R 3 0 L C R 2 1 L R Mono Surround 3 1 L C R Mono Surround 2 2 L R Ls Rs L C R Ls Rs 4 9 Model DP562 User s Manual Operation BITSTREAM MODE Bitstream mode indicates the type of Complete Main data information service in the Dolby Digital bitstream or O Assc Visual Imp o CG Assc Hear Imp O Assc Dialogue O CG Assc Commentary O CG Assc Emergency O Main Sv Karaoke O Assc VoiceOver CENTER MIX LEVEL Center Mix Level indicates the normal 3 0 dB downmix level of the center channel with respect to the left and right channels when three front channels are 4 5 dB in use d O or 6 0 dB Not Active 4 10 Model DP562 User s Manual Operation Surround Mix Level indicates the normal SRND MIX LEVEL downmix level of the surround channels if 3 0 dB surround channels are in use Or 6 0 dB o Not Active Dolby Surround mode indicates whether DOLBY SRND MODE or not the program has been encoded in Not Indicated Dolby Surround when operating in the two channel mode O Not Dolby Srnd O CG Dolby Srnd Not Active Bit Stream Identification N represents a BITSTREAM ID numerical version of the Dolby Digital standard as defined by the ATSC Language Code represents the language of LANGUAGE CODE the audio servic
84. ropriate or required The variable dialnorm provides information about average dialogue level or program level so that dialogue normalization can be performed at the decode stage When dialogue normalization is applied properly all programs are reproduced at the same subjective loudness i e the average dialogue level remains constant from program to program Large changes in level between different programs and even between program material and commercials can be avoided The process of downmixing also allows Dolby Digital to cater to a large audience while still providing for the individual needs of a user A 5 1 channel program can be downmixed at the decoder such as a DVD player or DTV set top box to create optimized two channel or even optimized mono reproductions The original 5 1 channel material is un compromised and available to a consumers with a Dolby Digital multi channel decoder while consumers with a Dolby Pro Logic stereo or mono playback systems can enjoy the program in a format appropriate for their playback system C 1 Model DP562 User s Manual Dynamic Range Compression Dialog Normalization amp Downmixing for Dolby Digital C 2 Operational Modes The following operational modes have been defined for implementing dynamic range compression and dialogue normalization within Dolby Digital C 2 1 Line Mode The Line Mode is useful for products generating a baseband line out signal The amount of compression that i
85. s applied may be scaled down or even defeated if downmixing is not in operation by the use of a scale factor between 0 0 and 1 0 where 0 0 is no compression and 1 0 is full compression Features Dialogue normalization always enabled Dialogue reproduced at a constant level 31 dBFS e Dynrng style compression used e Compression scaling allowed low level boost adjustment only e High level cut compression scaling allowed if not downmixing Dynrng values protect against peak level overload when downmixing Therefore no scaling of the high level cut is allowed C 2 2 RF Mode The RF mode is useful for products generating a downmixed signal for subsequent RF channel remodulation This mode results in the greatest amount of peak limiting RF Mode may also be used in consumer products as a late night listening mode with less dynamic range than Line Mode lower signal peaks to dialogue Features Dialogue normalization always enabled Dialogue reproduced at a constant level 20 dBFS in RF remodulated outputs Compr style compression used Compression scaling not allowed e 11 dB gain shift imposed in RF remodulated outputs Compr values protect against peak level overload No scaling of compression is allowed in this mode Because full compression is always applied and peak level compression is always at least 11 dB in this mode the entire signal can be boosted by 11 dB without fear of overload Note that because of t
86. similar sounds arrive at our ears at slightly different times the brain tends to focus on the first arriving sound and ignore the second A 2 Model DP562 User s Manual About Dolby Pro Logic and Dolby Digital A 2 Dolby Digital In 1992 Dolby Laboratories introduced a new film sound format featuring a digital optical soundtrack placed between the sprocket holes on 35 mm release prints The standard matrix encoded analog optical soundtrack was left intact so that the prints could play in any cinema In response to film industry requirements the new digital soundtrack provided six discrete channels three full range channels for left center and right screen speakers two full range surround channels and a bass only low frequency effects channel Figure A 3 Now generally called the 5 1 channel format this configuration has since become the standard for digital surround sound in the home as well as in the cinema To fit all this information in the space allotted to the digital track on movie prints Dolby Laboratories developed a new form of multichannel perceptual digital audio coding Being the third coding system developed by Dolby it was originally named Dolby AC 3 but is now widely known simply as Dolby Digital Era A C Left Sub Center Right Dolby De eram Digital gt LFE Decoder 4 a L iG gt L gt RS Left Right S
87. t data bits no parity and 9600 baud The serial I O port is used not only as the serial interface but also for software upgrades 2 4 Model DP562 User s Manual Installation 2 5 When connected to a computer the serial I O connector can transmit and receive data to control the front panel functions of the DP562 This allows control of the DP562 by the front panel buttons or by a remote control The front panel always reflects the current operating configuration of the DP562 The serial connector transmits all status changes back to the computer The Serial I O 9 pin D connector is also used as a computer interface port to perform software upgrades for the DP562 For future software upgrades connect the serial port of the computer to the serial 9 pin D connector of the DP562 See Section 6 Future Software Upgrades for more information on upgrading the DP562 Serial I O 9600 b s Female 9 pin D connector on the rear panel Connection Comment Direct connection to DTR DSR and CTS Asynchronous dataout Asynchronous data in Direct connection to DCD DSR and CTS Signal ground Direct connection to DCD DTR and CTS AAA a Direct connection to DCD DTR and DSR Q OHIWIg y n po l Q Q Ka WS 998 1j WE DTR MT X ME ES 8 CS Z Q Headphone The headphone connector and volume knob are located on the front panel Headphone 14 stereo connector 11 5 dBu output into 50 Q
88. t have individual amplifier gain controls self powered speaker gain controls or adjustable console group outputs not preferred If using a console it is advisable to set the master monitor volume control to a known marked position before proceeding with calibration This allows an easy return to the calibrated listening level at any time 1 Set the playback level for the Left channel Press SETUP on the front panel of the DP562 to enable the Setup menu screen Scroll down using the T and J buttons on the front panel to Output Ch Trims and press ENTER on the front panel Scroll down again using the T and 1 buttons to LEFT and press ENTER Press TEST NOISE on the front panel Test noise PINK or FILTERED will appear at the left speaker 2 Check the SPL meter and take note of the level Adjust that channel s amplifier gain control or associated mixer group output or self powered speaker gain control up or down as necessary to 85 dB or 79 dB Unless you have an assistant you may need to leave your sitting position to do this If so be sure to return to the same position with the SPL meter in the same position 3 Next return to Step 1 and repeat the procedure for the remaining Center Right Right Surround and Left Surround channels 4 As a final check exit the Setup menu and press TEST NOISE Pink noise generation will return to automatic sequencing to all channels selected Using the SPL meter and you
89. t which time the cursor will stop flashing To exit Master Level e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 2 Model DP562 User s Manual Setup 5 2 Output Ch Trims Output Channel Trims allows you to adjust individual audio channels in the analog outputs only to compensate for different amplifier gains speaker efficiencies and room acoustics The trim parameter tracks the audio channel specified in the Assign Channels screen of the Setup menu Each channel can be adjusted to a range from 6 dB to 18 dB in 0 125 dB steps 0 dB equals 24 dBU full scale If you enable Test Noise while in the Output Channel Trims menu test noise will remain stationary on the audio channel of interest See Section 3 Calibration TOP LEVEL STATUS LEVEL EDIT LEVEL SETUP MENU ENTER ENTER OUTPUT CH TRIMS OUTPUT CH TRIMS le LEFT 0 00dB ENTER a OUTPUT CH TRIMS 4 LEFT 0 00dd _ Y ENTER OUTPUT CH TRIMS Ki ENTER CENTER 0 00dB BIBOTBUTICH TAINS 4 CENTER 0 00dHl MENU NAVIGATOR Y OUTPUT CH TRIMS ENTER RIGHT 0 00dB OUTPUT CH TRIMS 4 RIGHT 0 00dBH Y OUTPUT CH TRIMS P R SRND 0 00dB ENTER E OUTPUT CH TRIMS R SRND 0 000H Y OUTPUT CH TRIMS P LSRND 0 00dB EN
90. the wall closest to the surround speaker you are measuring This will minimize shadowing or obscuring the meter with your body 3 2 3 Bass Redirection Before you calibrate the monitoring system you should decide whether bass redirection of low frequencies is required The DP562 decoder is capable of redirecting low frequency information below a selected frequency 80 100 or 120 Hz to the channels capable of reproducing them This is similar to the normal wide mode for the center channel in a consumer Dolby Surround Pro Logic decoder For example if you have five satellite speakers and a subwoofer you could redirect the low frequencies from the five main channels to the subwoofer output If you are using small center and surround speakers you can redirect low frequencies from those channels to the left right or subwoofer outputs If no subwoofer is available the low frequency effects signal LFE can be redirected to the left and right channel outputs of the DP562 For a list of all available Bass Redirection options refer to Section 5 10 Bass Redirection 3 3 Model DP562 User s Manual Calibration To set up bass redirection Press SETUP Scroll through the Setup menu using the T and H buttons to find Bass Redirection Select Bass Redirection by pressing ENTER TO dert Press ENTER again to display the current Bass Redirection option default is None You may use the T button to return to previous menu level
91. to the Edit Level The Edit Level is defined by a black flashing cursor AUTO SELECT is the default 4 Once in the Edit Level use the T and 1 buttons to choose AUTO SELECT ON or OFF 5 The parameter takes effect as soon as ENTER is pressed To exit LFE Monitor Mode Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu Press SETUP to return to the Status mode 5 6 Model DP562 User s Manual Setup 5 5 Headphone Mode Headphone Mode adjusts the headphone listening mode for either Stereo or Mono Due to some hardware limitations correct imaging in Stereo mode can only be achieved if the output channel assignments in the ASSIGN CHANNEL section of the setup menu are set to L R Ls Rs C Sw The default mode is Mono TOPLEVEL ML SETUP MENU ENTER ENTER HEADPHONE MODE y dEXDPNONEMODE 2 LISTEN MONO ENTER gt HEADPHONE MODE EN 1 LISTEN MONOR ENTER HEADPHONE MODE 4 KA ESCAPE OR Y MENU NAVIGATOR LISTEN STEREOS To set the Headphone Mode NOTE f you are not in the Setup mode press SETUP 1 Find Headphone Mode by using the T and J buttons to scroll through the Setup menu 2 Select Headphone Mode by pressing ENTER You have entered the Status Level Select Listen Stereo default by pressing ENTER This initiates the Edit Level The Edit Level is defined by a bla
92. tstream Detect is set to DISABLED and the Dolby Digital mode is not selected the unit will output un decoded audio to the outputs at full scale if a Dolby Digital bitstream is present At high playback levels you may run the risk of damaging your speakers or possibly your hearing To exit Bitstream Detect e Scroll to the ESCAPE menu selection and press ENTER to return to the main Setup menu e Press SETUP to return to the Status mode 5 9 Model DP562 User s Manual Setup 5 7 AES EBU Ch Select AES EBU Channel Select allows the DP562 to select the AES EBU input bitstream channel The AES EBU input bitstream can be formatted in either 32 bit or 16 bit mode If the input bitstream is formatted in 16 bit mode two channels PCM Dolby Digital can be carried within a single bitstream For example the input bitstream can have a Dolby Digital bitstream on one 16 bit channel and PCM on the other Dolby Digital can be in both channels or PCM can be in both channels AES EBU Ch Select allows you to select one of three options e Select CHANNEL 1 or CHANNEL 2 to decode a bitstream formatted in 16 bit mode e Select AUTO DETECT factory default to decode a bitstream formatted in 32 bit mode If the input bitstream is formatted in 16 bit mode when AUTO DETECT is selected decoding of Channel 1 will take precedence over decoding of Channel 2
93. und terminal of the power plug is connected directly to the chassis of the unit For continued protection against electric shock a correctly wired and earthed three pin power outlet must be used Do not use a ground lifting adapter and never cut the ground pin on the three prong plug UK As the colours of the cores in the mains lead may not correspond with the coloured markings identifying the terminals in your plug proceed as follows e The core which is coloured green and yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol iC or coloured green or green and yellow e The core which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black e The core which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red This apparatus must be earthed IEC Notices This equipment complies with the EMC requirements of EN55103 1 and EN55103 2 when operated in an E2 environment in accordance with this manual vi Model DP562 User s Manual IMPORTANT SAFETY NOTICE This unit complies with the safety standard EN60065 To ensure safe operation and to guard against potential shock hazard or risk of fire the following must be observed o Ensure that your mains supply is in the correct range for the input power requirement of the unit Ensure fuses fitted are the correct rating and type as marked o
94. urround Surround Figure A 3 Dolby Digital 5 1 channel playback configuration As happened with Dolby s analog surround technologies film sound provided a springboard for the application of Dolby Digital to other formats It was launched in two channel DBS Digital Broadcast Satellite applications in 1994 and reached consumers through 5 1 channel laser discs in 1995 Dolby Digital is the standard multichannel audio format for the ATSC Advanced Television System Committee digital television standard and is one of the standard multichannel audio formats for DVB Digital Video Broadcasting Dolby Digital is also the standard multichannel audio format for DVDs Digital Versatile Discs in NTSC National Television Standards Committee countries as well as one of the standard multichannel audio formats for PAL and SECAM DVDs Other uses include digital cable systems DAB and multimedia Dolby Digital is unusually versatile allowing such parameters as bit rate and number of channels to be tailored to particular applications It also provides features to ensure listener satisfaction under a wide range of circumstances A 3 Model DP562 User s Manual About Dolby Pro Logic and Dolby Digital e Data identifying each program s original production format mono stereo matrixed or discrete surround can be sent to eliminate confusion at playback or reception e Additional code can be added to program material when it is originally mi
95. ves repetition of an operation a step by step procedure for solving a problem or accomplishing some end especially by a computer Compr The variable used for heavy compression CRC Cyclical Redundancy Checksum It can verify code to see if the transmission is error free Custom mode A professional compression mode similar to Line Mode that allows Dialnorm to be turned on or off and adjust the high level cut and low level boost compression Dialnorm From dialogue normalization It provides information about average program listening level so that dialogue normalization can be performed at the decode stage Dialogue normalization The ability to allow all programs to be reproduced at the same subjective loudness with the same average dialogue level Dolby Digital AC 3 Dolby Digital AC 3 is a perceptual audio coding algorithm that takes advantage of auditory masking and both intra and inter channel redundancy to enable the efficient storage and transmission of high quality digital audio Originally conceived as a multichannel coding system Dolby Digital was first introduced in 1992 to provide digital surround sound in the cinema Due to its combination of high audio quality spectrum efficiency and flexibility it has since become the multichannel digital audio standard for laser discs DVDs digital versatile discs in NTSC National Television Standards Committee countries optional elsewhere and DVD ROMs In both multichannel
96. wn of the content of n original channels to produce m channels where m n DVD Digital versatile disc Dynrg The variable used for dynamic range compression information Dynamic range The range between the loudest and softest sounds that a system can reproduce Haas Effect A psychoacoustic phenomenon whereby the earlier of two identical sounds arriving at the ear will dominate the other Input Modes The following table lists all eight modes and defines which input channel is used for encoding based on the selected mode Audio Coding Mode Encoded Channels L Ch 1 R Ch 2 C L R L C R L R Mono Surround L C R Mono Surround L R Ls Rs L C R Ls Rs LFE Low Frequency Effects Line mode A consumer emulation mode where dialogue normalization is always on and adjustment of the low level scaling of dynamic range compression parameter is allowed Adjustment of high level scaling of dynamic range compression parameter is allowed only when downmixing does not occur D 2 Model DP562 User s Manual Glossary Listening modes Allows monitoring of various downmix modes to emulate consumer applications This covers both the number of outputs channels from a decoder as well as the number of speakers in the listening environment Lt Rt Left total and Right total channels of a Dolby Surround encoded stereo signal Lo Ro Left only and Right only channels of a regular stereo signal NTSC Nat
97. wn on either button allows you to scroll through a menu The ENTER button allows you to change parameters of the DP562 during menu navigation 4 2 Decoding Modes The DP562 supports four decoding modes e Dolby Digital e Dolby Pro Logic e Dolby Digital Dolby Pro Logic e Pass through Each mode and how it can be enabled using the front panel buttons is described below 4 2 1 Dolby Digital Mode When a Dolby Digital bitstream is present at the input of the DP562 Dolby Digital encoded data is decoded into PCM digital and multichannel analog outputs Dolby Digital decoding can be enabled automatically or manually To select the appropriate mode DISABLED REFERENCE or SILENT SWITCH refer to Bitstream Detect in Section 5 6 Setup The default setting for Bitstream Detect is REFERENCE When a Dolby Digital bitstream is present the DP562 automatically selects the Dolby Digital mode and the Dolby Digital LED steadily illuminates If no Dolby Digital bitstream is present the dedicated Dolby Digital LED flashes periodically and the DP562 passes through any incoming PCM audio Automatic Bitstream Detect is helpful when your program material alternates between Dolby Digital Dolby Pro Logic and PCM input signals In addition if the DOLBY SRND MODE is indicated flagged as either DOLBY SRND or Not Indicated in a 2 0 bitstream Dolby Pro Logic decoding engages automatically 4 1 Model DP562 User s M
98. xed so that subjectively constant dialogue keyed loudness is maintained as the listener switches between program sources No alteration of program dynamics is involved other than playback volume e Decoders can be designed to provide optimum mixdowns from multichannel programming such as a matrix encoded two track mix for analog Dolby Surround decoding a conventional stereo mix or even a mono mix e When programs with wide dynamic range such as movie soundtracks are played at low volume the system can apply appropriate compression to preserve low level content The degree of compression can be made to vary according to need e The listener can program the home system s Dolby Digital decoder to route non directional low bass only to those channels in the system that have wide range speakers or subwoofers Designed to take full advantage of human auditory masking Dolby Digital divides the audio spectrum of each channel into narrow frequency bands of different sizes optimized with respect to the frequency selectivity of human hearing This makes it possible to sharply filter coding noise so that it is forced to stay very close in frequency to the audio signal being coded By reducing or eliminating coding noise wherever there are no audio signals to mask it the sound quality of the original signal can be subjectively preserved Bits are distributed among the filter bands as needed by the particular frequency spectrum or dynamic nature of t
99. y of the DP562 is defined as the difference in time between the beginning of a valid Dolby Digital frame entering the DP562 and the output of the first PCM sample represented by that frame Note that at any sample rate a Dolby Digital frame represents 1536 audio samples The DP562 accepts data over both professional and consumer industry standardized interfaces The professional interface is specified by SMPTE The consumer interface is specified by IEC 61937 Each interface specification includes a specification for the latency of the decoder with respect to a reference point in the data stream The DP562 has a small additional delay over that specified in the SMPTE or IEC standards due to some extra processing that is performed Section B 1 below specifies the DP562 excess delay with respect to the professional SMPTE specification Section B 2 below specifies the excess delay with respect to the consumer IEC specification Section B 3 describes the latency absolute delay with respect to the beginning of the Dolby Digital frame as it appears on either type of interface B 1 SMPTE Specification professional AES3 The SMPTE specification describes placement of the Dolby Digital frame on the AES3 interface such that a decoder with the specified latency will produce audio that is timed correctly The specified decoder latency is exactly one Dolby Digital frame period with respect to the reference point The reference point is the first bit of the

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