Re: 1920x1080 Mode

Jeff Rife <wevsr@xxxxxxxx> writes:

> There is no difference in bandwidth required for 1920x1080/60i vs.
> 1280x720/60p (which Fox, ABC, and ESPN-HD all use), at least as far as
> cable systems are concerned: both take 3MHz.

I'm not sure I understand your syntax. Does the "c" in "a x b/c (i/p)"
mean the frame rate or the field rate? If it means the frame rate,
then according to table A3 of the August 2001 ATSC specification,
there is no 1920x1080/60i mode, only 1920x10280/29.97i and
1920x10280/30i.

And I would sure think there is a difference in encoded bitrate between
1920x1080/30i (or 1920x1080/30p for that matter) and 1280x720/30p. And,
of course, bitrate translates to bandwidth.
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