Easy EDID Creator Advanced EDID Editor User`s Manual
Contents
1. 17 3 3 9 Alphanumeric string 17 93 10 PIOGUC name 17 3 3 11 Display range limits 18 O E 18 3 3 13 Standard timing identifier definition 19 3 3 14 CVT Byte Code Descriptot o ccccsseeeecccccsecsseeeseececessaaeeesseeceessssaueesseecessasaeeeseeeessssaaaansess 19 3 3 15 Established timings 111 descriptof cccccccccccsseeeecesesneeeeecsaeeeeeeeesaeseeeesssseeeeessssaaeesesssaaneeess 20 3 3 16 Display Color Management Data Descriptot 21 AE GEA Ee Tes ON a E AEE E E EE AE EE O EEE 21 3 3 1 General CEA settings 22 2001060 0 E EEE EEE E E E E 23 POO 23 3 3 4 Speaker allocation 25 25 1 About the EDID The EDID can cause a lot of headaches for beginner system integrators so it s important to understand the main aspects of the EDID data structure However the Lightware factory EDIDs are designed to cover the most practical cases in some circumstances the ed2. 1 192kHz _ 176 4kHz _ 96 88 2kHz 48kHz _ 44 1 kHz _ 32 kHz C 24 bit 20 bit 16 number of channels Maximum bitrate kHz Audio data Figure 26 Short audio descriptor field You are able to set up to 13 different audio formats in the audio data block while the number of existing audio formats is higher so unfortunately it is not possible to include all formats To add a new format to the list select it from the drop down list and fill the parameters they can vary depending on the selected format then click on the Add button To delete an audio format select it from the list then click on the Remove button There is a lot of misunderstanding about the audio formats Please note that just indicating the capability to decode a format will not force the source to send it while the 2 channel PCM is always allowed according to the HDMI standard If you want to send compressed formats then you also have to set your source accordingly For example you have to select bitstream audio output instead of PCM and select the correct audio track However most players are able to decode the compressed formats to PCM they will not encode the content into another format There are exceptions for example DTS HD Master Audio holds a normal DTS audio in one substream and some players are able to send DTS instead of DTS HD if the CEA extension signals only DTS support Please note that Dolby True HD f
3. Vsync Full Vertical Frame width Vertical front porch Vertical resolution Horizontal front porch Horizontal back porch Horizontal resolution Vertical back porch 7 Horizontal sync width Figure 14 A full video frame The and Vsync signals determine the beginning of a new line and a new frame but not the active video frame The vertical back porch is the time usually measured in lines between the Vsync pulse and the first line of the active video area Vertical front porch is the time between the last active line and the next Vsync pulse The horizontal back porch and horizontal front porch can be interpreted similarly Both the and Vsync signals can use either positive or negative logic levels and the length of the pulses are determined by the video format You have to distinguish the progressive and interlaced formats An interlaced video consists only of the even or the odd lines in a single frame so the number of the active lines is half of the effective lines For example a 1080i resolution has only 540 lines which means lower pixel clock at the same Vsync frequency While editing a detailed timing descriptor Such as preferred timing mode you are able to determine the parameters discussed above By clicking on the Standard timings button you have the opportunity to select one of the predefined formats and the software will fill the fields with the accurate values however
4. Easy EDID creator a DVI or HDMI Please specify whether your sink device supports the High Definition Multimedia Interface or not IF you want to send audio then you have to enable the HDMI mode Only 24bit RGB support will be indicated as default but you will be able to add other color depths and spaces with the EDID editor later Please note that most DVI computer displays are not able to show HDMI signals IF you want to use DYI signal then leave the checkbox empty HDMI support Step 1 Select resolution Step 2 DVI or HDMI Step 3 Select audio Step 4 Finish Figure 2 Selecting HDMI support You have to decide whether you want to add HDMI support to your EDID or not Please note that the use of audio non RGB color spaces and deep color requires the HDMI mode If you leave the HDMI support unchecked your source will be forced to send DVI signal According to the standard every HDMI capable source shall be backwards compatible with DVI displays Please note that most DVI computer displays will not show HDMI signals however the MX DVI HDCP and MX HDMI matrices are able to convert these signals to DVI on the outputs if needed 2 3 Step 3 Select audio If you have selected HDMI support in the previous step you now have to specify the desired audio format The most common audio formats are listed here however the number of possible formats is greater If you don t find your preferred audio you are able a
5. button You are able to reorder the items by clicking on one and pressing the arrows on the right side To delete an item select it and click on Remove button Please note that some resolutions have two different definitions in the list such as 720x480p60 format However the resolution and the frame rate is the same the timing parameters are different If you don t know what to do we suggest adding both versions to the list 3 3 3 Audio data Specifying the correct audio format is an essential part of the system design According to the HDMI standard an HDMI Sink that is capable of accepting any audio format is required to accept two channel L PCM audio at sample rates of 32 KHz 44 1 KHz and 48 kHz If an HDMI Source supports any HDMI audio transmission then it shall support 2 channel L PCM with either 32kHz 44 1kHz or 48kHz sampling rate and a sample size of 16 bits or more These two rules ensure that 2 channel L PCM is acommon working solution in all case Page 23 27 visual engineering IGHTWARE Max Ch Supported sampling Frequencies Sample length Marx bitrate 192kHz 176 4kHe 96kHz 55 2 48kH2 44 1kHz 2 16 20bit 24bit 192kHz2 176 4 96kHz 88 2kH2 48kHz 44 1kHz 32kHz 16bit 20 24bit 48kHz 44 1kHz 32kHz 640 kHz 48kHz 44 1kHz 1536 kHz 45kHz 44 1kHz 192kHz2 176 4 G6kH2 88 2kHz 48kHz 44 1 192kHz 96 58 2kHz 48kHz 44 1kHz Remove Add new audio format
6. basic EDID you may place additional timings here Page 21 27 visual engineering IGHTWARE 3 3 1 General CEA settings General information CEA revision number Underscan support Basic audio support YU 444 support Yes General YUY 422 support Yes ww Free bytes in the CEA extension 4 byte s Figure 24 General CEA information field The CEA revision number can be selected under the General tab We strongly advise to use CEA revision 3 because version 2 and 1 are deprecated and shall not be included in DTV monitors The new version is backwards compatible so old sources have to interpret them accordingly however we have seen exceptions Digital Televisions usually use underscan by default which means that they crop a small border from the active video area and rescale the picture If you indicate the underscan support here then some VGA cards will try to compensate this and they will also rescale the picture from the original size to a smaller one In order to get the highest quality we advise to disable the underscan both in the CEA extension and both in the setup menu of your display device This method ensures the avoiding of picture rescale and making the performance better If your display device supports audio then set the basic audio support to Yes YUV444 and YUV422 support can also be indicated here These settings have an effect only if you use HDMI signal At the top of the scr
7. be downloaded from the http www microsoft com whdc system pnppwr pnp pnpid mspx web address The software will resolve this abbreviation in order to help you recognize the manufacturer You also have to set the EDID version here We strongly recommend the usage of 1 3 or 1 4 version but if you get compatibility issues with very old sources you may try other versions The extension flag indicates whether the CEA extension is present or not Set this field to zero if you don t want to use the second 128 bytes 3 2 2 Display parameters Some basic information can be set here These settings are present in the EDID data structure for historical reasons and usually they have no effect We strongly recommend that you set the signal interface to Digital and leave the other options unchanged 24bit RGB 4 4 4 is always sent when using DVI so the color bit depth and color spaces have no effect If you use HDMI the proper color space and supported depths have to be defined in the CEA block You are able to set the display size here by entering the horizontal and vertical lengths in centimeters separated by space but most sources will not check this field Display parameters Signal interface Digital Color bit depth Undefinied Interface standard definied Colorspaces RGB 444 Display size 52 32 Aspect ratio 0 62 Figure 10 Display parameters tab Page 11 27 visual engineerin
8. mode and frame rate you don t find the proper mode in the list then enter it and the program will estimate the best blanking times You have also the opportunity to import resolutions from other EDID files or specify second resolution Preferred resolution 1920x1080 60 Set up a secondary resolution Step 1 Select resolution Step 2 DVI or HDMI 2nd resolution 800x600 60 Step 3 Select audio Step 4 Finish Figure 1 Selecting the resolution The third method is to type in a new format and the software will estimate the best blanking times and sync parameters The resolution has to be entered in the following format no space character is required 1920 x 1080 i 50 neat a Horizontal resolution Separator Vertical resolution Interlace Progressive optional Separator Frame rate If the typed resolution is not defined either the VESA DMT or in the CEA861 standard the software will try to find the nearest format and modify the blanking times and pixel clock properly However it is possible that the result will not be adequate if it is possible use the import function instead Sometimes an additional secondary timing has to be set In these cases select the checkbox and specify the second resolution as described above 4 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 2 2 Step 2 DVI or HDMI visual engineering IGHTWARE
9. the different descriptors and timing standards In this case Easy EDID Creator can be very useful After starting the software component a wizard like graphical interface appears You have to complete four steps before creating the new EDID You are able to move between the different steps with the Back and the Next buttons Of course after finishing the process you have the opportunity to fine tune the details or add other formats by using the EDID editor 2 1 Step 1 Select resolution The preferred resolution can be defined here There are more ways to define the desired format You are able to select one from the drop down list where the most common resolutions are listed If you have the EDID of your display then the most practical way is to import the detailed timings from it Click on the import button and select the file with the proper EDID data After that a new window appears where the detailed timing descriptors are listed from this file You have to select one by double clicking on it and the resolution with blanking times sync parameters etc will be imported to the software visual engineering IGHTWARE isual engineering IGHTWARE Easy EDID creator Select resolution Welcome to the Easy EDID Creator With this program you are able to create a unique EDID according to your demands by answering three simple questions Details can be added or changed later if needed Please select the preferred resolution scan
10. this field correctly otherwise the color space audio and speaker settings will have no effect Page 25 27 visual engineering IGHTWARE HDMI options CEC address 1 a o o Audio Information 30 bits color Deep Color mode supported 36 bits color Deep Color mode supported 148 bits color Deep Color mode supported U 444 is supported in Deep Color modes CO DYI dual link operation is supported TDS clock 229 Figure 28 HDMI options field CEC address is for the consumer electronics control While this function is intended for home usage professional devices such as matrices splitters usually don t support it so it has no significance Audio information often referred to as Al in the standard holds data about copy protection not about HDCP We suggest setting this option to supported if you are unsure HDMI 1 3 has deep color support as a new feature that can be indicated by checking the checkboxes Please note that 48 bits color is not supported by the Lightware matrices so we strongly advise to skip this feature While the Lightware matrices are able to convert between the color depths on the outputs depending on the display capabilities selecting 30 and 36 bits color cannot cause compatibility problems Please note that higher color depths need higher bandwidth so if you get noise on the input it is a good idea to disable the 30 and 36 bpp support By default o
11. you also have the opportunity to change all values In the top right corner you will see the calculated frame rate based on the entered numbers visual engineering IGHTWARE Preferred timing mode Pixel clock 73 93 Mhz 1280 770p60 0 Horizontal Yertical Preferred timing mode Active a pixels pan lines Blanking 370 pixels 27 lines Sync offset 110 pixels 4 lines Sync pulse width 40 pixels 5 lines Border 0 mm 0 mm Size 664 mm 498 Interface type Progressive Stereo support Normal display no stereo Sync signal Standard timings gt gt Figure 15 Deatailed timing descriptor Blanking means the sum of the horizontal and the back porches while the sync offset is equal to the back porch The border and the size of the picture shall be given but usually it has no effect on the sent video signal While using digital signals e g DVI HDMI or DisplayPort you have to select the proper Digital Separate Sync option from the list 3 3 7 About the descriptor fields 2 3 and 4 descriptor can contain any other descriptor however it is strongly recommended to have one product name and one display range limits descriptor descriptor field empty There are no more descriptor present in this EDID Add a new descriptor Detailed timing Product Serial Number Standard timing Product name CVT 3 byte Established timings DCM Data Alphanumeric string Display ra
12. II descriptor This descriptor defines those Display Monitor Timings DMTs that are defined in the VESA Monitor Timing Standard but are not included in the Established timings There are 44 DMT defined standards here which can be moved between the two lists This is a table of supported DMTs and cannot define the video timing priority in order of importance Page 20 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 3 3 16 Display Color Management Data Descriptor Display Color Management descriptor Display Color Management polynomial coefficients 4th descriptor field Red Figure 23 Display Color Management Descriptor Color management data may be listed in this descriptor This requires the storage of the Display Color Management polynomial coefficients More information on deriving the DCM coefficients is available in the VESA DCM Standard This descriptor is almost never used 3 3 The CEA extension The CEA extension is an additional optional 128 byte long element for the EDID data structure This extension was defined in the CEA 861 standard and like the EDID it has more versions All HDMI compliant devices must have at least CEA extension version 3 but not all devices are HDMI compliant that have it CEA extension may hold up to 6 additional detailed timing descriptors the number depends on the size of other data so if there is not enough space in the
13. a resolution is present in the VESA DMT Computer Display Monitor Timing standard then the source has to use the timing parameters described here If the resolution is not present in this standard and CVT Coordinated Video Timing is not supported either Page 13 27 visual engineering IGHTWARE by the sink or the source the GTF formula shall be used to calculate the exact parameters If CVT is supported then it must be used instead of GTF ema Standard timings 1280x1024 60 The use of standard timings is 1600x1200 60 optional in all EDID data structure versions sions These fields provide identification for up to eight additional timings derved from the horizontal pixel count the image aspect ratio and field refresh rate These fields shall be used to identify supported modes that are listed in WESA or are calculated using the GFT Remove formula Refresh rate is allowed only in the Add new item 60 123Hz range Other timing modes shall be defined using the Resolution 0 pixel Detailed Timing Definition specification for more details Refresh rate Add item Figure 13 Standard timings tab To add a new item to the list you have to enter the horizontal resolution it should be between 256 and 2288 in increments of 8 pixels and the refresh rate accepted range is 60 123 select the corresponding aspect ratio and click on the Add item button The vertical resolution wi
14. an switch it to one or more input ports If you save an EDID to a file you have the opportunity to create a backup or edit them later If you open the saved EDID in the Advanced EDID Editor much more settings are available as described below 3 The Advanced EDID Editor 3 1 The structure of the Advanced EDID Editor The following picture shows the main window of the Advanced EDID Editor after loading some sample data Action toolbar Main area A Summary General EDID version 1 EDID revision 3 Manufacturer ID LWR Lightware Visual Engineering Product code 0000 Serial number not present Week of manufacture not specified Year of manufacture 2009 Bit depth Undefinied Standard Not definied Color spaces RGB 444 Aspect ratio Landscape 0 62 Display size 52 cm 32 cm Power management Standby not supported Suspend not supported Active off supported 4 Main menu Figure 5 The structure of the program window 3 1 1 The action toolbar The action toolbar has buttons for the most common operations such as load or save data Show Hide Open Create new Save Save as Upload Get display Figure 6 Action toolbar Page 7 27 visual engineering IGHTWARE Show Hide It shows or hides the EDID Editor window and decreases or increases the EDID router area Open It loads an EDID from a file The software supports raw data and Lightware file format as well Create new lt crea
15. ata bytes 0 1 2 3 4 5 6 0 50 FF FF FF FF FF 10 61 OF 00 00 OO oO oO 20 80 34 20 78 2 EC 18 30 98 25 OF 48 4C 21 08 40 49 40 O1 01 O1 O1 0 50 01 01 0 0 60 70 34 8 71 80 58 2C 45 00 BC 12 22 90 00 00 00 FC 00 54 58 100 36 30 35 OA 20 20 20 110 00 00 34 SO OF 4E 120 20 20 20 20 20 20 01 8 9 3D CB 11 01 0 54 46 oo 81 o1 01 01 38 2 40 00 00 1E 20 53 52 20 00 00 11 00 OA Figure 8 Map window 3 2 1 Vendor Product information TEKE Yendor Product information EDID Map gt gt Manufacturer ID Product ID Monitor serial number Week of manufacture Year of manufacture EDID version Number of extension flag Vendor Product identification This is the 3 charachter ISA LWR Lightware Visual identifier of manufacturer 0000 Only english capitalized letters are 3 low not present Not specified 009 33 lt Figure 9 Vendor Product information tab Page 10 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 By clicking on the Vendor Product information you are able to set the basic identifiers of your display such as manufacturer product ID serial number production date By clicking on the fields a context sensitive help appears to explain the details The manufacturer ID is a 3 byte code also called as ISA PNPID the full list can
16. datory requirement in the 1 3 version of EDID structure and it 15 optional but strongly recommended in the 1 4 version The name of the sink device can be defined here which some source will use to identify the display device The Lightware EDID router window and the front panel LCD also shows the value of this field The product name descriptor can be 13 alphanumeric characters long Page 17 27 visual engineering IGHTWARE 3 3 11 Display range limits descriptor Display range limits Yertical rate 58 Horizonal rate his Maximum pixel clock 1700 Wideo timing support Not appicable wv 4th descriptor field g supp pp kHz L Nf lL L M Figure 18 Display range limits descriptor This descriptor has to be defined if the frequency type at the Power Management and Features tab has been set to continuous mode You have to specify the valid range for the vertical and horizontal refresh rate and specify the maximum of the pixel clock The pixel clock shall be rounded to the nearest multiple of 10MHz If continuous frequency is supported you have to specify whether the GTF secondary CVT standard shall be used to determine the timing parameters We advise to indicate the CVT support since nowadays almost all display devices support it giving the source the highest possible freedom 3 3 12 Color point descriptor Color point descriptor ist white point 4th descriptor field Cl 2nd w
17. dd it later by using EDID editor The last option is All audio By selecting this option the support for the most common audio formats will be included however it is not possible to include all due to the restrictions of the standard Please note that 2 channel 48 kHz LPCM audio is always supported regardless of the selected option If you want to use a compressed format instead of LPCM you must set up your source properly e g select Bitstream output Page 5 27 visual engineering IGHTWARE Visual engineering IGHTWARE Easy EDID creator E Select audio Specify the audio format that you want to use Please note that 48 1 kHz stereo PCM will be supported in all cases according to the specification la your source sends PCM instead of the desired resolution you have to set the digital audio output to bitstream in your player s menu Select the All audio option if your AY receiver is capable of decoding every compressed content Just the most common formats are listed here the EDID editor software is able to handle much more m Miun settings and details 5 i Preferred audio format stereo 44 1kHz PCM x Step 1 Select resolution Step 2 DVI or HDMI Step 3 Select audio Step 4 Finish Figure 3 Select preferred audio support 2 4 Step 4 Finish You have to give a name to your new EDID as last step This name will be fit into the display product d
18. een you can check the free space in the CEA extension An additional detailed timing descriptor needs at least 18 bytes Page 22 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 3 3 2 Video data ese oe gt D A Short video descriptors NATIVE 1920x1080 p60 640x480 p60 sibs e i m A 1280x720p60 ia ACR NENA 1280x720p50 Descriptors even if they also use Detailed Timing Descriptors All short video descriptors have to be listed in order of priority the first listed format is the one identified as optimal Add new DTV mode This resolution is a native format Figure 25 Short video descriptor field The CEA 861 standard defines 59 resolutions for the DTV devices The exact timing parameters of these resolutions are defined in the CEA 861 document and they are referenced only with their ordinal number in the CEA extension You are able to enumerate up to 31 different formats here in priority order The elements at the beginning of the list have higher priority than others It can be also indicated whether a resolution is native or not Most HDMI sources such as DVD and Blu ray players game consoles decide about the resolution based on short video descriptors and ignore the preferred timing mode so you have to fill this field with special care To add a new mode select one from the drop down list and check whether it is a native format then click on Add
19. escriptor so it can be up to 13 alphanumeric characters long You also have to select the desired operation you are able to upload the new EDID to the actually used Lightware product or and save it to a file or and open it in the EDID editor By clicking on the Finish button the new EDID will be generated and the selected operations will be performed visual engineering IGHTWARE Easy EDID creator E Finish Congratulations The EDID is now ready l Please enter the name of your EDID up to 13 alphanumeric characters and select the desired ad operation Leen Note The EDID structure describes only the capabilities of the sink The source decides about the sent format so you also have to revise the settings of your source If there is no effect restarting your source is good idea O A Name MyNewEDID Upload to Save to file Open the EDID editor Step 1 Select resolution Step 2 DVI or HDMI Step 3 Select audio Step 4 Finish Figure 4 Final step Page 6 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 The Lightware Matrix Router will emulate a display with the capabilities set above when you switch it to an input port The source will not be able to distinguish the Matrix from a usual sink device You are also able to upload the new EDID to a user programmable memory slot of the router these slots are available at the 51 100 addresses and later you c
20. g IGHTWARE 3 3 3 Power management and features Standby mode suspend mode and active off are energy saving methods which can be implemented in the display devices Active off means the display will automatically turn off when the signal from the input is removed and turned on when the video comes back again Power management and features 4 Standby mode is supported N lt Suspend mode is supported Active Off is supported sRGB standard not default Preferred timing includes native res Includes lt T gi Frequency type Non continuous Figure 11 Power management and features tab If the sRGB standard has been set to default the display uses sRGB as its primary color space If a display is sRGB compliant then the color information described in the next section shall match the SRGB standard values Setting the preferred timing mode to Includes indicates that the resolution specified in the 1 descriptor block see later is the native resolution of your display module e g number of pixels in the LCD panel is important to understand the frequency type field since there is a lot of confusion about that Its meaning is different in the 1 3 and 1 4 versions of EDID standard In the 1 3 version this option indicates whether the display supports Generalized Timing Formula If GTF is supported then all video modes are accepted which are compliant with the GTF and w
21. hich are within the Display Range Limit Descriptor boundaries A GTF calculator spreadsheet can be downloaded for free from the http www vesa org Standards free htm web address after registration If you use the 1 4 revision of the EDID structure continuous timing frequency means supporting every possible video mode within the Display Range Limits Descriptor In this case it is mandatory to define this descriptor If this option is set to Non continuous then the source is permitted to send only the signals that are explicitly defined in the base EDID structure or in specific extension blocks We advise you to use Non continuous mode if you want to force a specific resolution onto your source and use continuous mode if you want to give the freedom to your source to select the video mode within the defined boundaries Page 12 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 3 3 4 Gamma Color and Established timings Gamma color and estabilished timings Gamma 2 20 Red 0 640 5 Gamma Color and Estabilished Timings Green Blue x White D E E Ad P oo w in on Estabilished timings 64024380060Hz2 S00x600a60Hz 10242 768060Hz2 832x6240 75Hz 4 09075 FT Estabilished timings are obligatory only For displays that are YESA Plug n Play compliant Figure 12 Gamma color and established timings tab The disp
22. hite point Figure 19 Color point descriptor Page 18 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 Chromacity coordinates x y for up to two additional sets of white points may be stored in the color point descriptor In addition gamma values associated with each white point may also be defined This descriptor is almost never used 3 3 13 Standard timing identifier definition descriptor Standard timing identifier definition 192041200060 1600 1200 60 Six additional Stadard Timings may be listed here See more information at the Standard Timings 4th descriptor field Remove Add new item Aspect ratio k Figure 20 Standard timing identifier definition descriptor If the eight possible standard timings are not enough for you you are able to add more standard timings with this descriptor One descriptor field can have up to six additional timings while the graphical interface is the same as discussed at the standard timings 3 3 14 CVT 3 Byte Code Descriptor Coordinated Video Timings 3 Byte Code Descriptor 1365x768 60 50 60 75 60rb Up to 4 video timing modes can be defined here that are not 1422 800 50 50 60 defined the YESA DMT 3110 or later Refer to YESA CVT Standard wersion 1 1 September 10 2003 For more information CWT definitions Refer to WESA 4th descriptor field VTB EXT Standard for more Remove infomation on CTS b
23. iting or creation of a new EDID cannot be avoided EDID is the abbreviation of Extended Display Identification Data and it is a 128 byte data structure which defines the capabilities of a sink device If the support for a format is not indicated in the display device s EDID then according to the standard the source is strictly forbidden to send this type of signal This is very convenient for the home users this behavior guarantees the best interoperability between the different devices but it can make a lot of trouble for system integrators with more sources and sinks at same time Unfortunately the standard is very complicated and it s not easy to understand the cross references and relations between the different versions even for the experienced users This chapter will provide a practical tutorial and explain the most common terms however there are lots of rarely used options and notions that will not be mentioned Please refer to the official standard for more details the VESA E EDID and DMT standards can be ordered from www vesa org while the DVI and HDMI standards can be downloaded free of charge from www hdmi org 2 Easy EDID Creator As you will see below creating a new EDID according to specific requirements is often a complex task with lots of possible pitfalls It is a usual assignment in real life when you want to force a specific video and audio format to your source as quickly as possible but you don t want to worry about
24. lay x y chromacity coordinates are required elements in the EDID 1 4 version These fields provide chromacity and white point information and the sources with advanced color profile management will use them Please note that most of the displays use the sRGB standard as default the sRGB values are shown in the picture above The Established timings section can define up to 17 predefined resolutions which have emphasized importance due to historical reasons Nonetheless this field is optional you have to indicate the 640x480 60Hz resolution here if you want to create a VESA Plug n Play compliant EDID This is important for example during booting personal computers while most of the computers that have old BIOS can only operate with VESA compliant devices You will see the selected resolutions in the left column and the available resolutions in the right column You are able to select one element from a list and move it by clicking on the appropriate button between the columns We strongly advise you to support at least 640x480 60Hz in order to avoid compatibility issues 3 3 5 Standard timings The use of standard timings is optional in all EDID versions This field provides identification for up to eight additional timings derived from the horizontal pixel count the image aspect ratio and field refresh rate These items don t specify the exact timings for the source e g sizes of blanking intervals so there are a few rules to determine them If
25. ll be calculated automatically To remove an item from the list select it and click on the Remove button We advise you to use detailed timing descriptor e g preferred timing descriptor described in the next chapter instead of standard timings if you want to force a specific resolution onto your source However this field can be useful when you don t have enough space for detailed descriptors to describe all the resolution you want 3 3 6 Preferred timing mode The first descriptor block in the base EDID structure has to contain a Detailed Timing Descriptor Most DVI sources will determine their default resolution according to this field so it is worth to understand it in more detail The most important parameter of every video signal is the pixel clock frequency often referred to as fock the horizontal sync Hsync frequency and the vertical sync Vsync frequency The ratio of pixel clock and Hsync frequency will determine the number of pixels per line the ratio of Vsync and Hsync frequencies determine the number of lines per frame The number of lines and pixels are not equal to the actual active video area due to the presence of blanking intervals These intervals usually are a significant part of the full frame but they will be not shown on the display so the width and height of the active video area is another very important parameter we usually mean these values when we say resolution 14 27 VSYNC
26. ng e g you are able to copy and print it if needed This summary has all options that can be set with the EDID editor By clicking on the EDID or the CEA in the left side menu you will get direct access to the raw 128 byte long data structures You are also able to edit these hexadecimal values this can be useful for experienced users Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 Extended Display Identification Data Raw data bytes E 828 00 OO OO OO OO OO 01 00 OO OW OO OO OO OO OO 00 OO OO OO OO OO 01 01 01 01 01 01 01 01 01 01 01 01 DF 09 60 AO 20 10 09 22 OF BO 21 OW jo 00 OO OO 10 00 OO OO OW 00 OO OO OO OO OO OO 00 OO OO OO OO OO OO 10 OO OO OO OW 00 OO OO OO OO 01 Calculate checksum automatically Figure 7 Editing raw data bytes The last byte of a 128 byte data structure is the checksum it has to be calculated properly in order to get a valid data If you check the Calculate checksum automatically checkbox the program will automatically recalculate the checksum byte while you edit the raw data If there is no CEA extension present then you will not be able to edit the second part In that case the software will offer adding a new extension The submenus of the EDID and CEA show the logical parts of the data structure The EDID has four descriptor fields which contains various da
27. nge limits Color point data There are four descriptor fields in the EDID structue The first descriptor shall be a Detailed Timing Descriptor others can be any of the above types Please note that the absolute maximum is four descriptors in the structrure you should decide which information is the most important The program may rearrange the order of descriptor fields to satisfy the requirements of the standard Figure 16 An empty descriptor field Page 16 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 By clicking on an empty descriptor in the left side menu the software will offer adding a new one When selecting an existing descriptor field a Delete descriptor button appears in the top right corner which enables you to remove the unnecessary elements 3 3 8 Product serial number descriptor Display Product Serial Number Text RC788123 Note Up to 13 alphanumeric characters are allowed 4th descriptor field Figure 17 Display product serial number descriptor You are able to specify a serial number in the EDID The serial number can consist only of the letters of the alphabet and numbers the maximum length is 13 characters 3 3 9 Alphanumeric string descriptor An arbitrary 13 characters long text can be defined here such as comments or copyright notes Only alphanumeric characters are allowed 3 3 10 Product name descriptor This kind of descriptor is a man
28. nly RGB is allowed in deep color modes except if you select the YUV444 checkbox here There is no way to get YUV422 in deep color mode according to the HDMI standard If there is deep color support you have to specify the maximum TMDS clock frequency in other cases you are allowed to set this field to zero Please note that the frequency of the TMDS clock and the pixel clock are not equal in deep color modes For example a 36bits pixel 1920x1080p60 signal has a TMDS clock frequency of around 223MHz Page 26 27 Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 NOTES Page 27 27
29. ormat is called MLP in the software since it uses the Meridian Lossless Packing method However the DIS HD and MLP are also lossless formats we suggest using multichannel PCM with a high sampling frequency to avoid interoperability issues The PCM carries uncompressed signal without quality loss and while the bandwidth is no problem on the HDMI links it has absolutely the same result as compressed lossless formats 24 27 3 3 4 Speaker allocation Easy EDID Creator and Advanced EDID Editor User s Manual Rev 1 0 If you have specified any multi channel LPCM digital audio before you have to set up the speaker allocation block correctly by selecting the correct checkboxes Speaker Allocation Data The abbreviations are Speaker allocation Speaker allocation information is present RLE RRC a LFE Note If the HDMI Monitor supports multi channel uncompressed digital audio as indicated in the Audio Data Block then the speaker allocation has to be specified Figure 27 Speaker allocation field RLC RRC Rear left center Rear right center FLC FRC Front left center Front right center RC Rear center RL RR Rear left Rear right FC Front center LFE Low frequency effect Subwoofer FL FR Front left Front right 3 3 5 HDMI HDMI support and related settings can be done here If you want to create an HDMI compliant EDID you have to set
30. ta The first field has to be a detailed timing descriptor this is the most important field of an EDID since it defines the native pixel resolution of the DVI or HDMI signal while the 2 3 and 4 field may have numerous different contents however there are some explicit requirements A range limit descriptor and a monitor name descriptor are mandatory in the 1 3 version and recommended in the 1 4 version of the standard If the space is not enough in the first 128 bytes additional detailed timings can also be defined in the CEA extension The size of other data such as video audio speaker allocation limits the number of detailed timings for example if you have a lot of audio formats you can use only 5 or fewer additional timing descriptors Don t be confused about the unknown notions they will be explained later Page 9 27 visual engineerin g IGHTWARE 3 1 3 The map window By clicking on the map button in the top right corner you can open a map near the main window area You can hide this by clicking on the map button again This map always shows where you are in the structure The actually edited data bytes are highlighted by yellow so you are able to follow the size and positions of the individual settings Please note that only 128 bytes appear in the map at the same time and the content may change if you leave the actual area Later you will find this function useful 3 2 The first 128 bytes EDID d
31. tes a new EDID with the default settings The default settings are as simple as possible so it is very likely that you have to extend them Save lt saves the edited data in Lightware format If the EDID was saved before or loaded from a file then it will overwrite the old one Save as It saves the edited data to a new file Upload It uploads the edited data to the Lightware Matrix Router You have to select the memory position after clicking You have the opportunity to upload the data to a user memory slot or directly to an input Get display If the Lightware Display driver is installed and your graphics card is supported you have the opportunity to read the EDID of your computer display After clicking on the button the available display devices appear and you have to select one 3 1 2 The main menu The layout of the left side menu follows the structure of the EDID It has two main parts the first 128 bytes are the actual EDID data while the second optional 128 bytes are a so called CEA extension CEA is the abbreviation of the Consumer Electronics Association this extension was defined in the CEA 861 DTV standard Usually but not exclusively the Digital Televisions and HDMI capable devices have CEA extension while DVI computer displays only have the first 128 bytes By clicking on the Summary you will get an extensive report about the settings and details in the main area this is also the default screen It is useful for debuggi
32. visual engineering IGHTWARE Easy EDID Creator Advanced EDID Editor User s Manual visual engineering IGHTWARE 1 2 Table of contents ABOUT THE EDID 3 EASI EDID CREATOR se eee aed ede es rede 3 T SELECT RESOLUTION saacssanunasenitatonnaeutcesa ainia 3 2 2 OTEP 2 DVI OR HDMI 5 3 OTEP OFLEOT AUDIO 5 6 THE ADVANCED EDID EDI OR 7 3 1 THE STRUCTURE OF THE ADVANCED EDID EDITOR 7 eV GUO TO ONO AN setae eset enema 7 o AE E E i I EE NA EAN AA EE A EE E E eee eee 8 Iod Ne MaD WINDOW 10 THE FIRST 120 BYTE G 10 O21 VENGON PIOOUCTIMONNAQUON 10 O22 11 3 3 3 Power management 12 3 3 4 and Established 5 u ccccscccccccccecessseeessecceeesssseeeeeecessssasueeeeescessssaaaaeess 13 NG ie Bea ars 210 A 2 13 3 3 6 Pr lerrea MINING MODE A e 14 3 3 7 About the descriptor fields 16 3 3 8 Product serial number 5
33. yte codes Add new item Addressable lines per field line Aspect ratio Preferred vertical rate 150 Hz with standard blanking 160 Hz with standard blanking 175 Hz with standard blanking 185 Hz with standard blanking 160 Hz with reduced blanking _Additem Figure 21 CVT 3 Byte Code Descriptor Page 19 27 visual engineering IGHTWARE In the CVT 3 Byte Code Descriptor you can define Coordinated Video Timings CVT that are not defined in the VESA DMT version 1 0 Revision 10 document This descriptor section may be divided to support up to 4 timing sub blocks To add a new item you have to specify the number of the lines the aspect ratio and the preferred vertical refresh rate In addition you have to add other refresh rates This descriptor is almost never used and it has no significance today 3 3 15 Established timings III descriptor Established Timings 11 descriptor Estabilished timings EDID Map gt gt gt gt 2nd descriptor field 1780 x960 85 This descriptor defines those Display Monitor Timings DMTs which are defined in the WESA Monitor Timing Standard but are not included at the Established Timings section see at Gamma page These setting are only used to YESA compliant display devices This descriptor cannot define the video timing pronty For more information refer to the newest release of the YESA Figure 22 Established timings I
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