For HDR, the main issue is mapping the 10 bit luminance into 8 bits. There may
be some different 8 bit luminance mappings, but a device would likely be able
to use the metadata to map to the local display. Of course, this is one of the
areas of HDR standardization that is still being debated...
The other reality is that it will be necessary to create many derivative
streams from a 4K or 1080P master, just as we do today to serve mobile and
fixed displays. So the master is just the starting point. A device may
negotiate with a server to deliver an optimized stream given the devices
capabilities and the bandwidth available. If the stream is optimized at the
server it may not be necessary to deliver HDR/WCG metadata.
Regards
Craig
On Nov 29, 2016, at 1:34 PM, Mike Tsinberg <Mike@xxxxxxxxxxxxxx> wrote:
Thanks Craig,
Yes if more 1080p content will come out with HDR the HDR will definitely be
more mainstream. In the case perhaps existing infrastructure: Cable and
Satellite STB's, Apple TV's can deliver 1080p HDR with a firmware upgrade.
Is it possible to use the same HDR metadata for 1080p or 4K versions of the
same content?
Best Regards,
Mike Tsinberg
http://keydigital.com
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Craig Birkmaier
Sent: Tuesday, November 29, 2016 7:58 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: Sparkle
Thanks Mark. This does a good job of describing the many significant ambient
light issues we are facing as we move to HDR.
My very un-scientific analysis, based on looking at TVs last week at Best
Buy, is that the use of OLED is likely to bring at least some of the benefits
of HDR to the masses across a variety of devices.
One other comment related to Mike's question about 1080P with HDR.
Much will depend on how affected industries decide to move forward with HDR
and improved masters. Obviously Hollywood is 4K with HDR and WCG now,
although the debate about film versus 4/8K electronic acquisition still
continues. In the end, Hollywood will deliver 4K to theaters, and 4K versions
on Blu Ray and for streaming. But I expect 1080P streaming will dominate.
For broadcasters the issue is related to the need to support both live and
pre-recorded programming. As you have implied, I believe the next step is to
move to 1080P (at all frame rates) with HDR and WCG. There's just not going
to be much need for higher delivered resolution with TVs that upsample to 4K.
The viewer will see more improvement from any available bits being used to
improve compression than to deliver 4K samples.
Regards
Craig
On Nov 29, 2016, at 7:29 AM, Mark Schubin <tvmark@xxxxxxxxxxxxx> wrote:
Here is a five-minute talk on why (aside from perceptual issues) HDR is a
problem in both cinemas and homes:
https://www.youtube.com/watch?v=eWSCGOmgSOc
TTFN,
Mark
On 11/28/2016 10:33 PM, Manfredi, Albert E wrote:
Mark Schubin wrote:
We have no interest in the latter [HDR on 4K material] but areBut presumably, the movie studios and cinema chains will adopt HDR over 4K?
already dealing with the former [HDR for 1080p].
What's the effect when projecting on cinema-size screens? Seems like the
darkened venue is a plus, but the huge screen a minus? Almost like it would
require lasers.
Bert
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