Do you have Video Decoder IC which supports Square Pixel Mode?

Hi,

Do you have Video Decoder IC which supports Square Pixel Mode?

I think that ADV7180 can support Square Pixel Mode.
But you don't recommend ADV7180 for customer's new design.
So I don't think we can suggest ADV7180 for new design.

Also, I searched "Square Pixel" on EZ thread. But I can not find an appropriate Video Decoder IC.
I think that ADV7181C and ADV7181D can not support Square Pixel Mode as following thread.
https://ez.analog.com/video/f/q-a/5425/adv7181c-ntsc-square-pixel-operation

=> Your comment: Sorry. Unfortunately square pixel mode is not supported for the ADV7181C.

And I also think that ADV728xA can not support Square Pixel Mode as following thread.
https://ez.analog.com/video/f/q-a/8559/adv7280-possible-square-pixel-and-de-interlace

=> Your comment: Unfortunately the ADV7280 does not support square pixel mode.

Do you have Video Decoder IC except ADV7180 which supports Square Pixel Mode?

Thank you!
Best regards.
Tamu

  • Hi Tamu San,

            I beleive, ADV7181C decoder can support square pixel mode(i.e you have to adjust the HS timing on the SDP output) but we haven't evaluated the square pixel mode on ADV7181C & We believe it might work if you configure the part completely in the normal PAL mode with addition to the below configuration,

       PAL Square Pixel: - Let's extend Table 19 from the ADV7181C manual

       HS Begin Adjust (HSB) = 00000000010b

       HS End Adjust (HSE)= 00000000000b

       HS to Active Video (LLC1 Clock Cycles) = 288

       Active Video Samples/Line = 768Y +768C = 1536

       Total LLC1 Clock Cycles = 1828

    Please refer here https://ez.analog.com/video/f/q-a/12314/adv7181c---ntsc-square-pixel-output/34619#34619

    Thanks,

    Poornima

  • Hi Poornima-san,

    Thank you for your reply.
    I have additional two questions.

    Question 1:
    How should we set the registers (HSB/HSE etc.) for NTSC Square Pixel?
    The customer wants not PAL but NTSC Square Pixel.

    Question 2:
    Can ADV7181D also support square pixel mode?

    Thank you!
    Best regards.
    Tamu

  • Hi Tamu San,

          Please refer below comments,

         Question 1:
    How should we set the registers (HSB/HSE etc.) for NTSC Square Pixel?
    The customer wants not PAL but NTSC Square Pixel.

            These details are provided in Table 19(HS Timing Parameters) at 0407.ADV7181C_Manuals.zip

    Question 2:
    Can ADV7181D also support square pixel mode?

         ADV7181D would also support square pixel mode, the above table has been mentioned in ADV7181D manual too.

    Thanks,

    Poornima

  • Hi Poornima-san,

    Thank you for your reply.

    Do you mean that we should set only "HS Begin Adjust (HSB) = 00000000010b" and "HS End Adjust (HSE)= 00000000000b" for NTSC Square Pixel mode for ADV7181C/ADV7181D?
    If other register settings are needed, could you tell me the register settings?

    Thank you!
    Best regards.
    Tamu

  • Hi Tamu San,

           Please refer below comment,

              1. Do you mean that we should set only "HS Begin Adjust (HSB) = 00000000010b" and "HS End Adjust (HSE)= 00000000000b" for NTSC Square Pixel mode for ADV7181C/ADV7181D?

                    YES

           2. If other register settings are needed, could you tell me the register settings?

                   Please configure the part completely in the normal PAL mode with addition to the HS timing configuration.

                   Kindly refer reference script for normal PAL mode configuration.

    Thanks,

    Poornima