[opendtv] Re: Chroma Formats and Why Europe should choose 720P for HDTV

  • From: Craig Birkmaier <craig@xxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Thu, 16 Dec 2004 10:20:08 -0500

At 10:06 PM -0700 12/15/04, Terry Harvey wrote:
>I think the merits of 720p50 outweighs any consideration of an interlaced
>standard. 720p (50 or 60) provides the best balance between temporal and
>spatial resolution. And it is relatively sane as far as bandwidth is 
>24p should be only relegated to Hollywood where the producers there like
>and are accustomed to film judder. (I know,  I know... 24p is to facilitate
>program production for Europe and America etc etc.)
>1080p is nice but the bandwidth requirements are crazy for everyday broadcast.
>I will concede that 480i to 720p on Fox looks awful. But how about 720p
>capture resizing to 480p for transmission and resize to 720p for display?
>This would produce a nice display, save bandwidth and would keep both the
>bean counters and the engineers relatively happy: it isn't a perfect world!
>Imagine with WM10... seven HD like program streams per ATSC OTA multiplex!

Looks like Terry get's it.

Oversample in production, Then resample enough to get rid of any 
remaining entropy and encode at HIGH QUALITY for emission. IF the 
receiver has high quality samples to work with, upscaling  by 25 -50% 
is not an issue.

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