DRM Software Radio PC based software for DRM reception User
Contents
1. Receiver position latitude 49 552794 degree M5 longitude 11 00192E degree W E Calculate output file Directory g f Below is the dialog for estimating the current receiver position by using an nearby airport as a reference Select the country in which pour receiver is located Select the airport nearest to you County Germany Airport NUREMBERG Enter the distance and direction from your receiver to the airport Distance fe kilometers Bearing SE Lat 49 55279N Lon 11 00192 Close DRM Software Radio User Manual Version 1 0 Page 16 of 23 mee EHH Fraunhofer institut integrierte Schaltungen About Box The about box provides Version number s copyright information and Web addresses of the evolved project partners About DRM Software Radio j O S x DRM Software Radio 1 0 19 Copyright S2002 FRG MS A All rights reserved This product may not be copied except to make single copies for archival or backup purposes and may not be decornpiled of revere engineered for other purposes or under other conditions than those stated m 69e German Copyright Act This productis only licensed for private use For receivers available for commercial use please visit our website tbo ana istha de dab oroducts dimrecerver Channel decoder and Audio coding technology licensed by Fraunhofer 115 4 Portions of Enhanced MPEG 4 AAC SBR coding techno2. DRM Signal in the Air Antenna 000 0 00000 DRM Software Radio User Manual Version 1 0 Page 6 of 23 bee EH IE Fraunhofer Institut integrierte Schaltungen 4 2 Modifications of existing frontends If a frontend provides an IF of 455 kHz it can be used for the DRM Software Radio by adding an 455 kHz to 12 kHz adaptor 455kHz to 12kHz Signal at female DRM Signal from frontend adaptor output connector 455 kHz 12 kHz 467 kHz Worked examples of frontend modifications are posted by the general public at http www drmrx org receiver_mods html DRM Software Radio User Manual Version 1 0 Page 7 of 23 mee Bia Fraunhofer Institut integrierte Schaltungen 4 3 Block diagram of the Software The following picture gives an overview about the software modules of the DRM Software Radio HTML Frontend Page 8 of 23 DRM Software Radio User Manual Version 1 0 HA EH IE Fraunhofer institut integrierte Schaltungen 4 4 Minimum System Requirements e Windows 2000 or Windows XP or Windows 98 e AT compatible PC e 500 MHz Intel Pentium processor or equivalent e 64 MB RAM e 50 MB free disk space e 16 bit SoundBlaster or compatible soundcard that supports full duplex at 48 kHz sampling rate for input and output the input must be without AGC Automatic Gain Control recommended Creative SoundBlaster Live or USB One USB Audio Interface e LAN network driver or dial up network insta
3. for this transmission there are 150 transmission frames and 1500 audio frames per minute For minute 0 the average SNR is 26 150 i e maximum FAC frames were received DRM Software Radio User Manual Version 1 0 Page 10 of 23 HA EH IE Fraunhofer institut integrierte Schaltungen correctly and 1492 audio frames were received correctly This means 8 audio frames were received with errors am a little surprised that all 1500 frames were not received correctly as a SNR of 26 is very good perhaps there was some transient noise 8 corrupted audio frames would not cause any dropout in practice the audio is still OK if 50 60 of audio frames are received OK If we look at minute 17 in the file then we can see there were only 500 correctly received audio frames so for this minute we certainly would expect to hear audio drop outs as only 33 of the frames were correctly received So if the file indicates few audio drop outs but you are hearing many then most likely there is a problem with the soundcard DRM Software Radio User Manual Version 1 0 Page 11 of 23 HH EH IE Fraunhofer institut integrierte Schaltungen Features gt Channel decoder M 4 5 and 5 0 kHz M 9 0 and 10 0 kHz M Mode A B C D M 4 and 16 QAM for SDC M 16 and 64 QAM for MSC M MLC with two iterations M All code rates M EEP and UEP M spectral inversion of input signal M Complete FAC and SDC decoding M Display of Service Label and Ser
4. on the same frequency If the user wants to access the stand alone data services he receives an overview in form of a list of all currently broadcast data services to choose from DRM Software Radio User Manual Version 1 0 Page 19 of 23 bee TT FEE IE Fraunhofer institut integrierte Schaltungen Using the Multimedia Player The Multimedia Player is started by pressing one of the DRM Service selection buttons of the DRMSoftwareRadio see chapter 6 If the selected DRM Service carries data applications stand alone or as audio program associated data the Fraunhofer DRM Multimedia Player window will be shown It automatically shows the multimedia services which are signaled as belonging to the currently selected audio service If there are no such multimedia services a message will be displayed The multimedia services can be classified into two groups e multimedia services associated to an audio program PAD Program Associated Data e independent multimedia services DATA ONLY DRM Software Radio User Manual Version 1 0 Page 20 of 23 HA EH IE Fraunhofer institut integrierte Schaltungen The following features can be accessed by pressing the corresponding buttons Toggles between full screen and regular view Switches to the DATA ONLY selection page All CTRL ALT H independent multimedia services which are broadcast within the current DRM program will be listed Navigates back in browsing history ALT LEFT A
5. EH IE Fraunhofer institut integrierte Schaltungen 4 Overview 4 1 Receiving path The following picture shows the DRM Software Radio system for reception of DRM signals Commercial PC with Frontend FhG Software Radio S The DRM Signal is received by an commercial long medium shortwave SW MW LW front end Any front end should be usable which can provide an IF of 12 kHz direct or with a adapter circuit The bandwidth must be greater 10 kHz for normal transmissions and greater 20 kHz for transmissions with channel bundling This signal is then fed into a standard soundcard The soundcard must offer a sampling rate of 48 kHz For output of the audio signal also a soundcard with a sampling rate of 48 kHz is required If one sound card is used for sampling the signal and output of the music the soundcard must provide full duplex operation Most of all newer soundcards provide all these features e g SoundBlaster Live from Creative Labs Attention must be taken not to use an input with AGC Automatic Gain Control as this disturbs the DRM signal Please pay attention that most of the internal soundcards of newer notebooks have the AGC enabled and offer no way to disable it They also have very often low pass filters which can not be disabled In order to get the system working on such notebooks or also on other PCs with no or no suitable soundcard we suggest the use of an external USB soundcard e g USB One USB Audio Interface
6. Fraunhofer Institut integrierte Schaltungen DRM Software Radio PC based software for DRM reception User Manual Version 1 0 DRM Software Radio User Manual Version 1 0 Page 1 of 23 HE _ AH Fraunhofer institut integrierte Schaltungen Content 1 DOCUMENT INFO 3 2 COPYRIGHT INFORMATION 4 3 CONTACT INFORMATION AND UPDATES OF SOFTWARE 5 4 OVERVIEW 6 4 1 Receiving path 6 4 2 Modifications of existing frontends 7 4 3 Block diagram of the Software 8 4 4 Minimum System Requirements 9 4 5 Tested soundcards 9 5 FEATURES OF THE DRM SOFTWARE RADIO 13 6 OPERATION OF THE DRM SOFTWARE RADIO 14 6 1 User registration 14 6 2 Graphical user Interface 14 6 3 Multimedia 18 SOFTWARE SETUP 23 7 1 Software Installation 23 DRM Software Radio User Manual Version 1 0 Page 2 of 23 HH EH IE Fraunhofer Institut integrierte Schaltungen 1 Document Info Document DRM Software Radio User Manual Author Thomas Jaumann Gerd Kilian Thomas Langer Alexander Zink Thomas Fr hwald James Briggs Date 2003 01 14 Version 1 0 FhG takes no responsibility for wrong or missing information in this document As the DRMSoftwareRadio is under development all information given in this document especially the graphical outfit and the available functions are subject to change without notice Revision Index p revision by VT Merlin Communications Updated screenshots for version 0 0 16 and GUI descrip tion Revision for software gen
7. RM Software Radio User Manual Version 1 0 Page 18 of 23 oon A Fraunhofer Institut integrierte Schaltungen e MOT Slideshow The MOT Slideshow is a very convenient service especially when combined with an audio main program In this case the user receives automatically updated visual information while listening to the audio service A good example is the weather forecast While the radio speaker explains the weather during the next days the user of the DRMSoftwareRadio can even see the information as he is used to it from TV Or the user gets informed of traffic problems with a visually prepared street map which states exactly and easily to comprehend all the affected locations ES DRM Multimedia Player OF x 2 oo m Se e ar ia h 5 F a The RadioShow with Dirks eli gol ch 07 13 pm Washington Peanut planters release new how to use proposals Ready A e Dynamic Label Service This service is also known as DRM text messages While the user listens to an audio main program he receives the latest news and updates immediately on the screen when they are broadcast This information may comprise traffic news stock information weather updates or other individual messages from the broadcast station to its listeners The application interface allows the user to switch between the program associated data of the audio program which he currently listens to and the stand alone data services which are broadcast
8. RM Software Radio User Manual Version 1 0 Page 23 of 23
9. RROW Navigates forward in browsing history ALT RIGHT ARROW Prints the content of the currently displayed page CTRL P Shows the About dialog indicating the version of the multimedia player Switches to the PAD page The multimedia services CTRL ALT P marked as belonging to the currently selected audio program will be displayed DRM Software Radio User Manual Version 1 0 Page 21 of 23 T A Fraunhofer Institut integrierte Schaltungen An example for the DATA ONLY selection page accessed by clicking on the button is shown below The actual content of this page depends on the DRM multimedia services which are currently received ES DRM Multimedia Player Joi x B ode DRM Multimedia Player Broadcast web site e aBroadcWebsite Slide show e aSlideShow Each of the listed multimedia services can be selected by clicking on the corresponding hyperlink From there it is possible to navigate further depending on the kind of service selected DRM Software Radio User Manual Version 1 0 Page 22 of 23 an EH IE Fraunhofer institut integrierte Schaltungen 7 Software Setup 7 1 Software installation Insert CD 2 Run Setup DRMSoftwareRadio_x x x exe and follow the instructions x x x is a placeholder for the actual revision of the software 3 Copy the license key file into the installation directory 4 Run DRMSoftwareRadio exe link is placed on desktop Ss End of Document D
10. eral release Sound card info update HVXC support Information on service buttons added Screenshots updated Multimedia section revised DRM Software Radio User Manual Version 1 0 Page 3 of 23 HE EH IE Fraunhofer institut integrierte Schaltungen 2 Copyright information This product and parts of it may not be copied except to make single copies for archival or backup purposes and may not be decompiled or reverse engineered for other purposes or under other conditions than those stated in 69 e German Copyright Act This product is under copyright of Fraunhofer IIS http www iis fhg de Portions of Enhanced MPEG 4 AAC SBR coding technology are licensed by CODING TECHNOLOGIES http Awww codingtechnologies com Parts of this manual are copyright of VT Merlin Communications http www viplc com merlin DRM Software Radio User Manual Version 1 0 Page 4 of 23 bee EH IE Fraunhofer Institut integrierte Schaltungen 3 Contact information and Updates of software Via Website at http www DRMrx org http www DRMswr com This web site will be supported and maintained for a 2 year period from December 2002 to January 2005 Updates and new versions of the software will be downloadable for registered users from this web site After initial purchase of the software future upgrades will be provided free of charge to registered users DRM Software Radio User Manual Version 1 0 Page 5 of 23 bee
11. ers DRM Software Radio User Manual Version 1 0 Page 13 of 23 Fraunhofer institut integrierte Schaltungen 6 Operation of the DRM Software Radio 6 1 User registration To enable the functionality of the DRMSoftwareRadio the user needs a personalized key file This file is provided after the purchase of the software The file has to be copied into the installation directory The user is not allowed to distribute this key file 6 2 Graphical user Interface The picture below shows a running DRMSoftwareRadio On the right side you can see the four buttons to select the DRM Service Up to four services may be available in a DRM transmission DRM Software Radio 1 0 19 M Input i Time Spectrum Status UTC 03 53 05 WZ Audio local 10 53 05 About Data F Bere fs FhG Radio o my English Old ea 450 1100 Pop Music Audio AAC sa Level dBFS Multimedia DRM Slideshow 48 sh Current Affairs hiuktimedia 7 0 kbps Germany Engli gt Multimedia Merlin Website y Germany English Information Mukimedia 7 0 kbps 4000 2000 z000 4 Ponte eee a nce e ee eea a m e e e a a a ii w olume DRM SottwareR adio FhG_ Its 4 10000004 User name ermail address gt country 49 339N 11 00 E 3 D r m Mer fin Fraunhofer m 4 coding O 7 Integrierte Schaltungen technologies The DRMSo
12. ftwareRadio window displays e Input Level as an LED level meter FFT of the Input Signal as an plot SNR of the Input Signal status of the decoder sync data audio decoding state as an green red LED Service buttons with service labels service information e g language country audio type with without SBR mono stereo and bitrate of the service content e DRM text message DRM Software Radio User Manual Version 1 0 Page 14 of 23 an EH IE Fraunhofer institut integrierte Schaltungen e Local UTC time display The user can e Select one of the 4 possible services with the 4 buttons on the right e Start the Multimedia Player for streams with multimedia content by pressing the according stream button e Adjust the output volume slider in the lower middle of the screen e Record status data to file Record button 4 services can be transmitted the services can contain audio and or multimedia data content the button with the audio service that is played by the soundcard is displayed in white light grey buttons for possible other audio services are grey with back labels buttons for services with multimedia content are also grey with black labels when clicking on an button with multimedia the multimedia viewer will be opened or if the multimedia viewer is already running the display will be switched to this content If an audio service is also containing multimedia data clicking on this button
13. lled e Suitable frontend with 12 kHz IF output output level suitable for soundcard 4 5 Tested soundcards The following soundcards have been reported as suitable to work in full duplex mode The internal soundcards have been tested and work in the following PC s Dell Inspiron 4100 Dell Inspiron 8000 Dell Inspiron 8100 Dell Inspiron 8200 is now also checked and works 4 Dec 2003 Dell Latitude 800 Dell Latitude 810 Dell Latitude 840 sony VAIO PCG C1MHP 860Mhz 128MB with Yamaha AC XG soundcard Dell Dimension desktop 4100 800Mhz 512MB with Creative SB Audio PCI 64V Dell 2 GHz Pentium 4 machine with a SoundBlaster live card Fujitsu Siemens T bird Desktop PC with a 933 MHz PIII amp Soundblaster Live Player 5 1 Soundcard Unbranded Pentium 1 8 GHz with a low cost sound Blaster PCI 128 1200MHz AMD Duron on Elitegroup Corp ECS K7VVM main board with intergrated sound card Laptop Gericom Webengine Force 2440 XL 2 4 GHz 512 MB RAM SIS 7012 Wave built in Unbranded PC with AMD Athlon 1 7 GHZ amp Soundblaster Live 5 1 MEDION 2 5GHz from ALDI HOFER in Austria sometimes you need to disable the AGC or sound boost via the settings for the DRM Software Radio User Manual Version 1 0 Page 9 of 23 HA EH IE Fraunhofer Institut integrierte Schaltungen soundcard This depends on the driver you have loaded for the soundcard An external soundcard had to be used with the following PC as the internal one was no
14. logy licensed by CODING TECHNOLOGIES es Dr m a Fraunhofer sem coding C g amp ST os rs Integrierte Schaltungen technologies TEST DAM tho aaa drm or Merlin Communications http www merincorm murnications com Fraunhofer HS http Awww tis fhg de coding technologies http www codingtechnolagies com DRM Software Radio User Manual Version 1 0 Page 17 of 23 HH ME Fraunhofer institut integrierte Schaltungen 6 3 Multimedia The Fraunhofer DRM Multimedia Player permits the reception and presentation of multimedia content which is sent besides regular audio services together with the DRM signal It comprises currently the following types of multimedia services e MOT Broadcast Website This multimedia service allows the broadcast of complete web sites including HTML pages and images The individual capabilities of a receiver are defined as receiver profiles In contrast to restricted mostly integrated receivers the DRMSoftwareRadio Multimedia Extension supports the full unrestricted profile This means easy access to all current and future features of the HTML and other internet standards The user can navigate through the received HTML pages as if they were loaded from the internet ES DRM Multimedia Player GB Me g Traffic Service S July 2001 07 14 pm Highways State Streets AS Nuremberg to Munich between Denkendort and Lenting car accident 2 lanes blocked 07 08 pm D
15. t suitable Compaq Armada E500 Unspecified mainboard with integrated C media sound Sometimes soundcards can seem to work but do not have full duplex ability In this case audio dropouts will occur The following procedure can give an indication of the location of the problem Use the record function to generate a file Here is a file recorded and posted by tido1322 in the forum www drmrx org forum MINUTE SNR SYNC AUDIO TYPE 0000 26 150 1492 10 0 0001 26 150 1474 10 0 0002 25 150 1399 10 0 0003 24 150 1409 10 0 0004 25 150 1348 10 0 0005 24 149 1242 10 0 0006 24 150 1380 10 0 0007 25 150 1429 10 0 0008 25 150 1422 10 0 0009 25 150 1472 10 0 0010 24 150 1342 10 0 0011 25 150 1346 10 0 0012 26 150 1348 10 0 0013 26 150 1401 10 0 0014 24 150 1086 10 0 0015 22 150 908 10 0 0016 21 150 790 10 O 0017 19 150 500 10 O 0018 21 149 805 10 0 Here is a guide for the meaning of the figures MINUTE minute of recording SNR average SNR of this minute SYNC number of frames in this minute where FAC CRC was OK AUDIO number of error free audio frames in this minute and separated by number of audio frames per transmission frame TYPE 0 AAC etc audio coding type lf we take a look at the AUDIO column we can see how many audio frames are decoded correctly Each audio transmission frame is 400 mS long and Tidos1322 file the 10 part indicates there are 10 audio frames per transmission frame So this means
16. vice Information M Display of Text messages M All implemented features ETSI TS 100 980 V1 1 1 compliant gt Multimedia M Program associated and stand alone data application support M Text messages M Slideshow service M Broadcast Website gt Audio decoder Vv AAC Vv SBR M HVXC DRM Software Radio User Manual Version 1 0 Page 12 of 23 HE C E Fraunhofer institut integrierte Schaltungen 5 Features of the DRM Software Radio The DRM Software Radio enables you to receive and to listen to DRM transmissions by using a suitable PC see chapter System Requirements and a suitable frontend DRMSoftwareRadio exe includes Channel Decoder The Channel Decoder is the Software inside the DRMSoftwareRadio which does the decoding of the DRM signals The Channel Decoder is part of the DRMSoftwareRadio exe program Using the Monitoring and Recording or the Signal Analysis option the user can have a look at various stages of the ch annel decoder MPEG4 AAC SBR Decoder The Audio Decoder decodes the binary data transmitted in a DRM signal and produces audio output It is part of the DRMSoftwareRadio exe program The decoding libraries were provided by Coding Technologies www codingtechnologies de Q coding by technologies Graphical user interface Includes user localization based on Airport locations Includes recording of status files Description please see following chapters Multimedia Description see following chapt
17. will also open the multimedia viewer buttons for unused services are grey with a grey label no service the text on the buttons have on the first line the name of the service and on the second line information on the content of this service country Language type audio multimedia data and bitrate setup dialog This dialog is used to Select the input soundcard for the DRM IF input Select the output soundcard used for the playback of the decoded audio signal Switch the spectral inversion of the input signal on off Disable the Multimedia support SS i tit Input Soundcard Creative Sound Blaster AudioP Cl Output Soundeard Creative Gaid Blaster AudioP El Spectral inversion of input signal Disable Multimedia Cancel Recording After pressing the Record button on the main window a new dialog is displayed where specific information on the reception can be entered e g the frequency the frontend is tuned to the receiver location Also the output directory for the recording can be selected in this dialog If you do not know your exact position e g from a GPS device you can press the Calculate button to open a further dialog box where your position can be determinated by using an airport nearby as an reference point DRM Software Radio User Manual Version 1 0 Page 15 of 23 ae At Fraunhofer Institut integrierte Schaltungen I x Frontend Frequency 15425000 Hz
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