[opendtv] Re: Why Europe should choose 720P for HDTV
- From: Tom Barry <trbarry@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 14 Dec 2004 19:49:06 -0500
Craig Birkmaier wrote:
.
.
.
> There are perceptible benefits in bumping the resolution. But the
> biggest advantage to an HD DVD, comes from the removal of the
> interlaced footprint.
You really do not like interlace. ;-)
> It is indeed unfortunate, but as Tom points
> out, the current generation of DVDs is limited by the need to filter
> for interlace. This WAS NOT NECESSARY, but it happened. IF all DVD
> players had included a simple low pass filter, then the source could
> be optimized for progressive display, adding more vertical detail -
> the filters would remove this detail on the interlaced outputs of the
> player.
>
> One must assume that the same mistake will not happen again with
> HD-DVD. One would expect that the movie would be encoded with the
> highest levels of detail possible, and that the player would create a
> filtered interlaced output after downconversion from the HD format.
>
And you are somewhat optimistic, and may be surprised. For instance I
think I read D-Theater is filtered for interlace and, IIRC, not even
coded with repeat flags.
And the blu-ray folks are still trying to use MPEG-2.
But I hope you are correct.
> What I would like to see is 1024 x 576 @24P with full vertical detail
> and full color detail (4:4:4). I am virtually certain that this would
> compare very well with 720@24P using 4:2:0 encoding when upconverted
> to 720P.
I agree 4:2:0 is way too sparse. (as is 24 FPS)
But why screw around? If they made HD-DVD's with modern codecs they
could probably use 4:4:4 at 1080p@24. It is true that 1024x576 RGB
could look very good but we might as well go the whole way once we can
afford the bits.
Just because we couldn't see it on almost all current displays (1080i or
720p fixed) doesn't mean we shouldn't do it.
I would happily be willing to wait for my upscaling display on that
format until I could afford a 4kx2k fixed pixel display.
Cheers,
- Tom
>
> Regards
> Craig
>
>
>
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