Craig Birkmaier wrote: > > For example, if a given movie will fit in an HD-DVD > > either as 720 at 24p or as 1080 at 24p, why bother > > with 720 at 24p? The DVD will cost no less if you > > load it with 720p. > > 1. It is likely that 720P will deliver higher quality > samples at the available bit rate; This is a valid comment *only* if the channel bit rate or available storage capacity are inadequate for 1080. Of course. I agree that the constraining channel width or storage capacity are the primary concern here. When Tom Barry proposed use of a higher compression encoding algorithm, such as H.264, it was specifically to ensure that the bit rate or storage capacity would be adequate for 1080. If it fits, use it. It's your next two points that continue to be non sequiturs. > 2. More than 90% of viewers will still be > watching the SDTV down conversion; Which is irrelevant by itself, even if true (which it is not anymore). If the DVD plays in their DVD players, or the signal fits in the 6 MHz TV channel, no need to limit the quality of the signal. > 3. Unless your display is larger than 100 inch > diagonal you WILL NOT see any difference. Which continues to be irrelevant to the problem of optimization. "Optimization" means maximizing (or minimizing) an objective subject to a list of constraints. Aside from your #1 point, the other two points aim to reduce quality (i.e. the objective) possibly below that allowed by the constraint set. There's no valid excuse for this. Since the highest quality of HD has been defined to be 1080 lines, that is where HDTV will migrate over time. The Europeans are exactly correct to question any pre-conceived one size fits all 720p notion, especially if they are not constained to MPEG-2 for HD. Bert ---------------------------------------------------------------------- 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.