[opendtv] Re: 1080P Question
- From: "Mike Tsinberg" <mike@xxxxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 22 Sep 2009 14:06:06 +0000
Yes the conversion to old format is now responsibility of the TV or the STB.
This is always the case the when incoming signal is "better" then display
format. It is also driving TV makers to upgrade the TV's to better
capabilities. The 1080p/24 is not exactly in this category. The interpolation
or simple frame repeating of incoming 1080p/24 in TV's capable of 72 or 120 Hz
refresh will result in better motion then 60Hz refresh capable TV that will
uitilize traditional 3/2 pull down. The Deep Color may also create a better
result for more then 8 bit capable TV's.
Mike Tsinberg
http://www.keydigital.com/
-----Original Message-----
From: Stessen, Jeroen [mailto:jeroen.stessen@xxxxxxxxxxx]
Sent: Tuesday, September 22, 2009 07:40 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 1080P Question
Hello,
Mike Tsinberg wrote:
ØIt seems that with HDMI 1.3 support for xvYCC color, Deep Color and
multichannel uncompressed audio it is the first time in history when consumer
driven Video Audio connectivity format is ahead in quality features compare to
the broadcast driven connectivity format. For years the lead was with
broadcasters using SDI and HD-SDI. The HDMI 1.3 is now far ahead of HD-SDI...
I would like to put it in another way: a more versatile interface makes it
possible to shift
your problems to (the guy on) the other side of the link. Like:
-xvYCC shifts the color space conversion and gamut mapping problem to the
display
-deep color shifts the quantisation problem to the display
-(1080p) 24 frames per second shifts the frame interpolation (repetition) to
the display
-uncompressed audio shifts the problem (or at least the cost) of decoding to
the source
To be fair, this also eliminates a couple of bottlenecks, where you would have
to compress a
signal (color gamut, bit-depth, bit-rate) in order to pass it legally over an
older standard link.
That leads to degradation of the signal, possible loss of information, and it
adds cost.
So it's partly selfish and partly practical to remove some of the limitations
of the interface.
I presume that such problems are more acute on the consumer side of the chain.
That being said, HDMI 1.3/1.4 may create more new problems than they solve......
Greetings,
-- Jeroen
Jeroen H. Stessen
Specialist Picture Quality
Philips Consumer Lifestyle
Advanced Technology (Eindhoven)
High Tech Campus 37 - room 8.042
5656 AE Eindhoven - Nederland
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