[opendtv] Re: FCC Opens TV Spectrum for Broadband Use
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 13 Dec 2010 08:35:50 -0500
At 3:05 PM -0600 12/10/10, Manfredi, Albert E wrote:
Exactly. The first HD cameras were 1080i. THEREFORE, as I said, any
engineer worth his degree would want to accommodate that option in
the standard. At the very least, as a transitional option.
No they were 1440 x 1035 lines.
And it was a HUGE mistake to allow ANY FORM OF INTERLACE in the
standard. Interlace was and continues to be a crude form of video
compression that was designed for an analog world. The main reason
it is in MPEG-2 and the ATSC standard is that key CE/video equipment
vendors were able to create a mountain of new IP, based on technical
concepts that were, or were about to be in the public domain. The
concatenation of interlace with entropy based digital encoding is
nothing short of a DISASTER.
Not really. These are mere words you're uttering. The reality is,
web sites don't work well or at all with old VGA-only computers and
slow CPUs. In TV, that way of operating wouldn't work. People would
get mighty irate if broadcasters obsoleted their sets in 5 or 6
years.
STOP THIS SILLINESS BERT. We are not talking about computer displays
standards, which left 640 x 480 VGA displays in the last century. We
are talking about the number of pixels per frame, number of lines per
frame, and the aspect ratio of streams of moving images that are
distributed via the Internet.
And people would not care a wit about this stuff if the system and
the consumer receivers/displays were designed properly to deal with
scalability and extensibility. People would simply buy a display with
an appropriate number of samples for the designed viewing distance
and the display aspect ratio that they desired.
I was looking at flat panel computer displays at Best Buy yesterday.
They were available in multiple sizes, resolutions and display aspect
ratios.
We've been over this many times, Craig. Your supposed "solution" is
to impose image distortion, image cropping, or waste of precious TV
screen real estate as a way of life. I find that, frankly,
unacceptable. That's no solution.
IT IS the way of life today for every display except TVs. Get over it.
I prefer to see the composition intended by the creator of the content.
Content creators know the limitations of the media they work with.
In movies, they stick to only two formats most of the time, both
wide screen. Occasionally they use IMAX **only** for stuff they know
will go to IMAX screens.
Hollywood has hundreds of aspect ratios and a significant number of
different aspect ratios are used for distribution. There is a reason
that movie theater screens have moveable curtains on the sides; they
can be adjusted to deal with accommodating all of the different
aspect ratios that are used in distribution today, just as the
vertical portion of the screen that is used varies with each
presentation.
And there is a reason that virtually ALL Hollywood releases on DVD
are letterboxed into the 16:9 TV format so that the entire original
composition is preserved.
Content creators are perfectly capable of showing the occasional
vertical image with wide black bars left and right, if they so
choose, but it would be inexcusable to leave them with no idea of
the optimal dimensions of the TV medium. Just like it would be
inexcusable for the movie industry to provide no standards to movie
studios. That's just unrealistic rhetoric, Craig
As Mark Schubin has explained so many times, there really is not
optimal dimension for a display. The Golden Rectangle is about as
close a it comes, but even this is just one of many possible
compromises. The right choice is APPLICATION dependent; what you want
to view most of the time.
My preference back when would have been a 2:1 ratio as TV standard,
to be right between the two movie standards, however 16:9 is not bad.
This is what we in the computer industry and Hollywood proposed.
Regards
Craig
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