How to output NTSC analog data formatted in Cr0/Y1/Cb0/Y0?

j-breeze

Hello,

We need to have video data in Y1/Cr0/Y0/Cb0 format to output through VENC.
Could you show us how to output the data formatted in Cr0/Y1/Cb0/Y0 in DDR?

The output is NTSC Analog so we can't use YCCCTL.YCP or VIDCTL.YCSWAP.
Do we have to swap Y and C by EDMA in DDR?

Best Regards,
Kouhei Shikama

over 14 years ago

0 Paul.Yin over 14 years ago

TI__Genius 14405 points

Hi, I am not sure if I understood the question. If it is analog output, why are you swapping C & Y? The output is a waveform where Y & C are superposed. The order only matters when you display through the VENC LCD interface.

0 j-breeze over 14 years ago in reply to Paul.Yin

Mastermind 7560 points

Hi, Paul-san

Thank you for your reply and sorry my delay response.

Do you mean the Cr0/Y1/Cb0/Y0 memory format is Ok for analog output?
The Y1/Cr0/Y0/Cb0 format is only needed for Digital LCD output?

Best regards,
j-breeze

0 Paul.Yin over 14 years ago in reply to j-breeze

TI__Genius 14405 points

Hi,

Sorry I misunderstood you. I just tried it. You are correct, nothing seem to help on this and the order of Y & C seemlying cannot be reversed in the VPBE registers.

I will ping our designers for more help. But at this moment, I don't have a good suggestion on how to swap the data.

0 j-breeze over 14 years ago in reply to Paul.Yin

Mastermind 7560 points

Hi, Paul-san

Thank you for your quick reply.

I understood.
And I asked my customer to chenge their product spec.

Best regards,
j-breeze

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How to output NTSC analog data formatted in Cr0/Y1/Cb0/Y0?