 telcodad
join:2011-09-16
Lincroft, NJ
kudos:2
1 edit | reply to lorennerol
Re: [HD] Get Ready for "Ultra-HDTV" Are you saying that it is too early to start arguing over which is better - 7680i or 5120p? 
Actually, 4K-HDTV (»en.wikipedia.org/wiki/4K_resolution) in the "Quad Full High Definition" (QFHD) format of 3840 x 2160 pixels in a 16:9 ratio, is just four times the resolution of the 1080p HDTV, and Version 1.4 of the HDMI Spec supports it.
With Comcast compressing the current HD channels at 3:1 per 256QAM carrier, maybe with a more advanced compression scheme, they could get a QFHD channel squeezed into one 256QAM.
As for 8K (»en.wikipedia.org/wiki/Ultra_High···levision), the Wiki article says that the BBC intends to trial 8K UHDTV during the 2012 Summer Olympics.
Edit: Also, one application of UHDTV is for glasses-free 3DTV: »www.multichannel.com/article/475···ance.php |
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telcodad
join:2011-09-16
Lincroft, NJ
kudos:2 | said by telcodad:With Comcast compressing the current HD channels at 3:1 per 256QAM carrier, maybe with a more advanced compression scheme, they could get a QFHD channel squeezed into one 256QAM.
Here is a candidate for the compression scheme for UHDTV - "High Efficiency Video Coding" (HEVC), also known as H.265 (»en.wikipedia.org/wiki/High_Effic···o_Coding ):
"HEVC aims to substantially improve coding efficiency compared to AVC High Profile, i.e. to reduce bitrate requirements by half with comparable image quality, at the expense of increased computational complexity. Depending on the application requirements, HEVC should be able to trade off computational complexity, compression rate, robustness to errors and processing delay time.
HEVC is targeted at next-generation HDTV displays and content capture systems which feature progressive scanned frame rates and display resolutions from QVGA (320x240) up to 1080p and Ultra HDTV (7680x4320), as well as improved picture quality in terms of noise level, color gamut and dynamic range." |
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| I want to know when the heck we're going to see this encoding with Comcast. |
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 markofmayhemWhy not now?Premium
join:2004-04-08
Pittsburgh, PA
kudos:5
 ·Comcast
| said by Mike Wolf:I want to know when the heck we're going to see this encoding with Comcast.
It begins candidate testing for "capture" this summer.
»www.itu.int/itu-t/workprog/wp_it···isn=7752
I have posted about JCT-VC's efforts for the past few years. It is a good reason to not waste money on MPEG-4 rollouts. It is a fantastic solution to deliverable streams in tight bandwidth without the horrific side-effects that MPEG-4 demonstrates. HEVC will be a much better digital TV solution than the MPEG-4 joke that was forced upon us.
Things must happen before its delivered in-home:
Source back-haul must be upgraded to a better quality than today (especially Fox!!!)
CPE must be significantly increased to handle the brute computational force needed in smaller form factors and power use
Cost must be lowered with adoption in other areas before source material is prepared (UV discs and pay-IP-streams would help tremendously)
After that, THEN someone like Comcast would receive content with quality and cost adequate enough to encode further for home delivery. DirecTV as well. Press releases are fun, but have no bearing on the fact that the US is 5-10 years away for "live, non-special high paying special" TV. The Superbowl? Olympics? Much sooner than 5-10 years...
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Show off that hardware: join Team Discovery and Team Helix |
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Reviews:
·Comcast
| reply to telcodad
said by telcodad:With Comcast compressing the current HD channels at 3:1 per 256QAM carrier, maybe with a more advanced compression scheme, they could get a QFHD channel squeezed into one 256QAM.
I could see them doing it with a full QAM and MPEG-4. |
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telcodad
join:2011-09-16
Lincroft, NJ
kudos:2 | said by nysports4evr:I could see them doing it with a full QAM and MPEG-4.
Maybe, but as markofmayhem said, MPEG-4 does not provide a quality video experience, especially for something called "Ultra" HDTV. |
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| reply to markofmayhem
Ok, but when will the new compression technology be made compantibe with current CPE like TiVo and Moxi and HTPC's, or currently deployed DVR's that are rented? |
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| reply to markofmayhem
said by markofmayhem:CPE must be significantly increased to handle the brute computational force needed in smaller form factors and power use And given that they are still stubbornly handing out 6+year old DVRs and it's nearly impossible to get the newer 2+ year old boxes, I don't see this happening for a long, long time. |
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 Anonymous_AnonymousPremium
join:2004-06-21
127.0.0.1
kudos:2
·RoadRunner Cable
| reply to telcodad
said by telcodad:Are you saying that it is too early to start arguing over which is better - 7680i or 5120p?
7680i would be better on a CRT type of TV Since interlace is native on it
Progressive scan will be better on LCD/OLED/Plasma
since they have native progressive scan |
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