[opendtv] Re: 1080P Question
- From: Tom Barry <trbarry@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 22 Sep 2009 11:24:44 -0400
We talk about interpolation or repeating frames for 24p but it seems
simpler if a multisync display just displayed them at 24 fps. On a
non-flickering (non-interpolating) fixed pixel display there shouldn't
be any difference between 24, 48, or 72 Hz display when the source is
24p. So why don't the displays just sync to 24?
- Tom
Mike Tsinberg wrote:
> 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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