[opendtv] Re: Two decades of progress...
- From: Craig Birkmaier <craig@xxxxxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Tue, 3 Jun 2014 06:55:11 -0400
Jeroen
Thanks for this reply.
I've spent too many years on the bleeding edge, trying to act as an agent for
positive change. In this position one learns very quickly how technology and
"politics" can be used to bring about progress, or to slow it down. But those
who play the blocking game do so at great risk. Science can be subverted,
co-opted, and bought, but eventually theories must be proven, repeatable and
turned into practical solutions/products.
Twenty years ago we could only imagine what we take for granted today. I still
remember an OpenDTV Forum at NAB (I think it was in 2000), walking around the
room with a 2-POUND"tablet," pulling pictures out of the air from an OFDM
transmission, thanks to the efforts of Mark Aitken and Sinclair.
Now I am writing this message on an iPad and preparing to watch the Apple
Developers Conference keynote "on demand," via the Internet and my WiFi router.
Did anyone sitting in that room in 2000 expect that such a device would exist
today? Did anyone expect it would ALSO be capable of capturing HD video,
editing it, then sharing the results around the world via YouTube?
Let me know what can be done to help facilitate real progress.
Regards
Craig
> On Jun 1, 2014, at 4:11 PM, Jeroen Stessen <jeroen.stessen@xxxxxxxxxxx> wrote:
>
> 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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