Hello. I have a question about ADV7511.
Can ADV7511 output HDMI with 800x480p format?I can not see the format on H/W manual or datasheet.
Thank you.Best regards.
As long you implement the audio injection the same as other formats you should not have any problems with audio and WVGA output from the ADV7511. It sounds like you want to transmit a format close to VIC 2 or 3 (720x480p60)
You should keep HDMI compliance since this is what the ADV7511 was designed to. If it is a custom design you will not have to be HDCP compliant.
The ADV7511 is basically a parallel to serial converter. As long as you don't exceed any clock rates the part will output any format you throw at it.
Thank you very much.
I have an additional question.
Can ADV7511 output HDMI with both video data of 800x480p(WVGA) and audio data?The customer wants to use ADV7511 with this use case.If you have a good solution, please let me know.
I have an additional information.
The customer will design both of the HDMI source and HDMI sink.So these do not have to keep HDMI compliance specification.ADV7511 can output only 800x480p(WVGA).
Can ADV7511 output HDMI with both video data of 800x480p (WVGA) and audio data?The customer wants to use ADV7511 with this use case.If you have a good solution, please let me know.
Thank you for your reply.
If ADV7511 send output HDMI with both video data of 800x480p(WVGA) and audio data to any ADV HDMI Rx device (ADV7611, ADV7612, etc.),can this system work correctly? (Can we see the video and listen to the audio correctly with this use case?)
Also, can you guarantee this use case?(I think it can't be done because 800x480p(WVGA) and audio data is not specified with HDMI specification...)
Also, does the pixel clock have to be higher than 27MHz (pixel clock of 720x480p)?I think if we use pixel clock 27MHz for this case, the audio packet may reduce because the blanking area is smaller than 720x480p.Pixel clock of WVGA is 33.75MHz. Can we use 33.75MHz for this use case?How much frequency should we use?
I have not tested 800x480 plus audio, however 720x480 is specified in CEA-861. As long as there is enough blanking interval the audio packets should be inserted correctly.
NTSC is transferred at 13.5MHz and uses 2x pixel repetition to give a TMDS clock of 27MHz. You can insert audio into the NTSC source so inserting into the 800x480p source should be just fine.
I suggest you you get an evaluation board like the Advantiv™ EVAL-ADV7619-7511 Video Evaluation Board and see if you can set it up the way you want it. It will also prove you can insert and audio stream into a video stream. Note, you will have to tweak N and CTS values to get good audio out.
We will test it with Video Evaluation Board.But we want your opinion before we test it.
Question 1:If ADV7511 send output HDMI with both video data of 800x480p(WVGA) and audio data to any ADV HDMI Rx device (ADV7611, ADV7612, etc.),can this system work correctly? (Can we see the video and listen to the audio correctly with this use case?)What do you think?
Question 2:I had a meeting with the customer yesterday.He says he will implement HDCP to this system.In this case, do we have any problem or concern for 800x480 plus audio?
Q1) the ADV76xx should receive the video/audio just fine
Q2) HDCP is authenticated over the DDC lines, they really have nothing to do with the video stream. HDCP only provides a key to encrypt/decrypt the video streams.
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