[opendtv] Re: Two decades of progress...
- From: Jeroen Stessen <jeroen.stessen@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 1 Jun 2014 22:11:25 +0200
Hello friends,
On 2014-05-29 17:22, Craig Birkmaier wrote:
But the area that drew the most heated arguments during the Task Force
Report development was colorimetry. It became a war between two noted
experts, Charles Poynton and Gary Demos that never ended; instead it
was put on the back burner for twenty years. The unfortunate reality
is that that the video industry chose to protect the limited gamut
optimized for CRT displays that were largely gone by the dawn of the
new millennia.
Funny that you should mention this...
There's a good chance that Charles and I will co-present a paper at the
next IBC. My contribution will be to show that HDR and Y"CbCr 4:2:0
do not go together well, and that we should move to Y"u'v' instead
(with some optimized processing to get rid of any disadvantages).
So then you will have it all: a high dynamic range (5000 nits, more ?)
and an infinite color gamut (more than our eyes are able to see).
(I must ask Charles which side he was on, 20 years ago...)
Your figure, by the way, illustrated u'v' exactly, and the new gamut
will be a square drawn around the horseshoe. You may smile now.
I would welcome any other arguments that you can think of in favor
of a new full color gamut. With your help I think we can pull it off.
I'm writing Y" in honor of the new OETF-EOTF pair, pioneered by Dolby
who call it the "Perceptual Quantizer", and based on the work of the
late Dr. Peter Barten who was with Philips (in CRT design !).
Progress is circular, it's an infinite loop... :-)
Best,
-- Jeroen
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