Originally posted by Jim N
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I think you may find that Tektronix format is bespoke and not a standard. If memory serves me well, HD for film and tv was only ever deigned to work at a screen aspect of 16:9. When you have a 4:3 picture in the HD world, it is just placed in the middle of a 16:9 background. This will have a lot of wasted pixels either side, weather at 720 or 1080. Although this center 4:3 image on a 720 background looks to be 960x720, this should not be mistaken for the anamorphic variation of 720. I could be wrong, but all HD is 1:1 pixel aspect and 16:9 screen aspect, and 720x576 with 1:1 pixel aspect is neither a HD format or a legal PAL standard.
Cheers.
Dave.
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