>On Wed, 2003-09-03 at 17:23, Vidiot wrote:
>> 768x576 is not a digital spec (that I've heard of). For PAL it is 720x576.
>> Frame rate is a given, i.e., the NTSC or PAL rates.
>
>768x576 is the square pixel (1:1) variant of the "official" PAL
>resolution of 720x576 (CCIR601). The advantage of square pixel is that
>you don't need scaling over the display to make the ratio look good.
>I.e., every video pixel becomes a screen pixel and you're done. For
>CCIR601, the pixel ratio isn't exactly 1:1, so you need to rescale for
>playback/overlay for it to look as it's supposed to.
>Ronald
>From the top of my head, I think it is 1.2:1 for PAL and 0.9:1 for NTSC.
In any event, AFAIK, 768x576 is not an official digital sample size. That
means finding a card to do it might be a little tough.
MB
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