I am not necessarily disagreeing with anyone here but let me just say that: * The primary reasons we just added the 4:4:4 Profile to the H.264/AVC FRExt Amendment were 1) To support non-YCbCr color spaces (like RGB, SMPTE XYZ' or multispectral imagery) where chroma subsampling simply makes no sense and 2) to support the post industry where you are doing many generations of postprocessing and can't afford all the chroma up/downconversion each time. (Yes, there is going to be I-frame and other forms of compression in post.) * The primary justification for including the new H.264/AVC 4:2:2 Profile was for interlaced applications. * After spending a few years looking at the highest possible quality progressive D-Cinema imagery on the biggest screens with the best (2K black chip) projectors going thru both 4:2:0 and 4:4:4 codecs, I see no reason not to use 4:2:0 chroma format for compression (so long as the imagery is progressive). -----Original Message----- From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Barry Sent: Wednesday, December 15, 2004 2:00 PM To: opendtv@xxxxxxxxxxxxx Subject: [opendtv] Re: Why Europe should choose 720P for HDTV As that's two posts correcting me now I guess I better clarify my sloppiness. The "it" that I was claiming we couldn't currently see was the full glory of 4:4:4 1080p and not referring to seeing the difference between the lower resolutions bandied about. - Tom John Shutt wrote: > 3 out of 4 programs on PBS's HD schedule are actually widescreen SD > upconverted to 1080i. The difference is very noticeable. > > John Shutt > > ----- Original Message ----- > From: "Doug McDonald" <mcdonald@xxxxxxxxxxxx> > >>>Just because we couldn't see it on almost all current displays (1080i >>>or >>> 720p fixed) doesn't mean we shouldn't do it. >>> >> >>That last is false ... it CAN be easily seen, and noticed, as it is >>actually AVAILABLE TODAY, almost every day. It is visible on Fox OTA >>TV. It is clearly inferior to true HD 720p. > > > ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.