[opendtv] Re: 1080P Question
- From: Kilroy Hughes <Kilroy.Hughes@xxxxxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 9 Sep 2009 05:41:55 +0000
I’m not in a relevant company’s marketing department that has been flinging
“deep color”, but I understand “deep color” to be HDMI 1.3 options for
increased bit depth over the wire, as you indicated.
xvYCC is entirely separate technically, usually applied to 8-bit encoded video
(just violate Rec 601 limits on negative coefficients, and you are “extended”).
It is supposed to be called “extended gamut”, has a little logo with CIE chart
and everything … but then 802.3 became “Ethernet” and 1394 became “Firewire”;
so behold the power of marketing; it laughs at our puny technical facts.
Kilroy
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
Behalf Of ShLampen
Sent: Tuesday, September 08, 2009 10:10 PM
To: opendtv@xxxxxxxxxxxxx; opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 1080P Question
Wait a minute!
I thought xvYCC WAS "deep color" and currently comes in three flavors:
8-bit (24-bit RGB), 12-bit (36-bit RGB) and 16-bit (48-bit RGB), with the last
one offering 281,474,976,710,656 possible colors.
Also, it was my understanding that the first "deep color" device was not a
BluRay player but the Sony PlayStation 3.
Am I wrong??
Steve Lampen
Belden
In a message dated 09/04/09 13:31:20 Pacific Daylight Time, mike@xxxxxxxxxxxxxx
writes:
Yes unfortunately there is no transition or any guards against xvYCC to 709
miss-conversion... It seems xvYCC as well Deep Color and Dolby Tru HD features
of HDMI 1.3 may only be implemented in Blu Ray and only be displayed on devices
that are capable. For the rest of the media distribution infrstratute it is
mission impossible. Even in Schubin's Super High Quality digital theater system
it is not happening...
Mike Tsinberg
http://www.keydigital.com
-----Original Message-----
From: Kilroy Hughes [mailto:Kilroy.Hughes@xxxxxxxxxxxxx]
Sent: Friday, September 4, 2009 02:11 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 1080P Question
But, how bad does it look when content is encoded xvYCC and the display (or
something else in the signal chain) clips negative RGB coefficients to Rec 709
gamut?
I?m struggling with that chicken/egg problem for Internet delivered content.
It might be possible to write new rules for a new channel and new devices, but
if those files land on legacy devices or plug into legacy displays resulting in
people have green faces ? I don?t see a bridge to transition from a 709 to
xvYCC world of content and devices. Well, if all render devices recognized
xvYCC content and displays, and could convert to 709 output if xvYCC isn?t
supported, then it would work ? but requiring that of all devices (which
eliminates most existing devices) isn?t likely.
Kilroy Hughes
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
Behalf Of Mike Tsinberg
Sent: Thursday, September 03, 2009 11:25 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 1080P Question
When source and display are both at xvYCC the results are sepctacular!
Mike Tsinberg
http://www.keydigital.com
-----Original Message-----
From: Mark Schubin [mailto:TVMark@xxxxxxxxxxxxx]
Sent: Tuesday, September 1, 2009 12:39 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 1080P Question
We transmit based on Rec. 709 (HD color space). Digital-cinema theaters may
transcode to whatever works best for them.
TTFN,
Mark
Mike Tsinberg wrote:
So practical use of 1080p/60 for transmission is questionable at best. This
format is in use for display of Mark Schubin events. Have these events utilize
the xvYCC color space or HDTV color space?
Mike Tsinberg
http://www.keydigital.com/
-----Original Message-----
From: Mark Schubin [mailto:TVMark@xxxxxxxxxxxxx]
Sent: Monday, August 31, 2009 06:22 PM
To: opendtv@xxxxxxxxxxxxx<mailto:opendtv@xxxxxxxxxxxxx>
Subject: [opendtv] Re: 1080P Question
"Rent" was 1080p24.
TTFN,
Mark
Mark Schubin wrote:
1080i for all the ones I've worked on.
TTFN,
Mark
Mike Tsinberg wrote:
In live per view event what is the transmitted format?
Best Regards,
Mike Tsinberg
http://www.keydigital.com/
-----Original Message-----
From: John Shutt [mailto:shuttj@xxxxxxxxx]
Sent: Monday, August 31, 2009 03:21 PM
To: opendtv@xxxxxxxxxxxxx<mailto:opendtv@xxxxxxxxxxxxx>
Subject: [opendtv] Re: 1080P Question
1080p60 in a theater setting is useful for live Pay Per View events. John -----
Original Message ----- From: "Mike Tsinberg" To: Sent: Monday, August 31, 2009
2:04 PM Subject: [opendtv] Re: 1080P Question In that case I see a motion
problem. If original film is captured with 24 frames/sec and converted to
1080p/60 frames/sec for display - the motion will have 2 /3 pull down type of
motion jitter. On the other hand 24 frames/sec film displayed at 72 Hz or 96 Hz
will not have such problems. So what is the point to display 1080p/60 in the
movie theater? Best Regards, Mike Tsinberg Key Digital Systems Cell:
646-391-7537 email:mike@xxxxxxxxxxxxxx<mailto:email:mike@xxxxxxxxxxxxxx>
http://www.keydigital.com/
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