[opendtv] Re: BBC Demonstrates HDTV Broadcasts over SD Channels
- From: "Kilroy Hughes" <kilroyh@xxxxxxxxxxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>, "Craig Birkmaier" <craig@xxxxxxxxx>
- Date: Sun, 3 Jul 2005 16:40:55 -0700
The HD DVD-V application format is specified for use on both Red laser
(DVD) and Blue laser (HD DVD) discs. A publisher can pick the color
based on how many bits they need to ship.
While you can put a majority of movies on an 8.4GB DVD dual layer disc
at 1080P24, it will require a challenging bitrate for today's encoders
(7 - 12 Mbps average), more compressionist time, and reduction of
typical "special features" video, and advanced features unique to HD
DVD-V (animated user interface, broadband applications, lossless audio,
etc.).
It will be interesting to see if publishers go for the most visual
impact per buck (720P), or marketing numerology (1080P) and features. =20
Most consumers consider the output of DVD-V players to be quite good,
especially 480 progressive and upsampled 720P models. They haven't
tested well on perceived difference of HD alone (vs. re-buying equipment
and their disc library to get it). Most people agree the next
generation has to be "dramatically better" than DVD-V to get consumers
to "switch", so sometimes that translates to putting the big number on
the package.
Kilroy Hughes
Program Manager, Media Standards
Microsoft Corporation
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx]
On Behalf Of Craig Birkmaier
Sent: Wednesday, June 22, 2005 14:54
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: BBC Demonstrates HDTV Broadcasts over SD Channels
At 9:35 PM -0400 6/21/05, Tom Barry wrote:
>But it makes a lot of sense for HD-DVD (of any flavor). There you
>have surplus bandwidth in the next generation storage media
>combined with a likely 24p film sourced movie that is easy to
>compress. Add in 4K oversampling telecine machines and it becomes
>a fairly easy decision for any vendor that wants to provide the
>highest quality (if they really do).
If you say so.
it may sound better from a numerology perspective, however, it will=20
be very difficult to show any meaningful difference between 720@24P=20
and 1080@24P source on screens smaller than 100" diagonal, and=20
between upconverted 720@24P and native 1080@24P on large 1080P=20
screens.
I really do not believe that the market for big 1080P home theater=20
systems is going to be large enough to sustain 1080@24P DVDs.
What is likely to be a more significant factor is getting HD movies=20
onto current generation Red Laser DVDs. There are growing doubts=20
about the viability of either HD-DVD format, especially with=20
holographic DVD on the horizon. Existing DVDs can deliver 720@24P now=20
with advanced codecs such as H.264 and VC-1; 1080@24P would be a=20
stretch for Red Laser DVDs.
I strongly suspect you will soon be seeing Red laser DVD players with=20
H.264/VC-1 support and DVI/HDMI outputs.
Regards
Craig
=20
=20
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