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

  • From: Bob Miller <bob@xxxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx, tjharvey@xxxxxxx
  • Date: Thu, 16 Dec 2004 15:35:36 -0500


Keep asking I would really like to hear an answer yea or nea.

Bob Miller

Terry Harvey wrote:

>4:4:4?  I would be surprised if you could see the difference between 4:4:4 
>and 4:2:2: I can't.
>I can see the difference between 4:2:0 and 4:2:2 only because of an 
>interlaced raster. On a High Definition display I doubt if you could see 
>it. (Especially with the current 'state-of-the-art consumer displays).
>No one mentions the recording issues: with limited luma/ chroma resolution 
>formats such as HDCam and DV100, there is a lot less than 1920 pixels per line.
>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 concerned.
>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!
>Terry Harvey

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