[opendtv] Re: Chroma Formats, P versus I, and Resolution Issues

  • From: "Thomas L McMahon" <TLM@xxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Fri, 17 Dec 2004 02:24:51 -0800

That's what may happen in many D-Cinema business segments (but not because it 
makes the pictures look any better).   However, in
others, they'll capitalize on the based of 4:2:0 equipment that's available 
and/or the fact that implementing a 4:2:0 codec at those
resolutions (and memory bandwidth requirements) is less painful.

-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On 
Behalf Of Jack Heneghan
Sent: Thursday, December 16, 2004 10:46 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: Chroma Formats, P versus I, and Resolution Issues

Tom McMahon wrote:

>Note that the D-Cinema context has only one pass thru the following sequence:
>
>Master in 4:4:4, convert to 4:2:0, convert to compressed state, then 
>distribution, back to uncompressed state and back to 4:4:4 then display.
>
>If the application required more passes I might have a different 
>opinion
>
>  
>
For D-Cinema, why bother with the conversion and the compression? Ship 
it as 4:4:4 and display it as such.   For D-Cinema, bandwidth and data 
storage should not be an issue.

Jack Heneghan
 
 
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