HDMI 2.0後遺症

r32

上星期SMPTE (the Society of Motion Picture and Television Engineers)舉行了2013 Annual Technical Conference and Exhibition, 其中一個座談會是"Next Generation Imaging Formats: More, Faster, and Better Pixels"

內容集中在high video frame rates, ATSC 3.0, 反而HEVC和HDMI 2.0被忽略了.


BTW我反而關心作者提及的以下內容 :

Although it wasn't discussed at the symposium, I want to clarify what manufacturers mean when they claim their current displays have "HDMI 2.0" capabilities. Some of these capabilities can be implemented by updating the firmware of existing chipsets, but other capabilities can't be implemented without new hardware, which we won't see in consumer products until next year. For example, current HDMI hardware, which has a bandwidth of 10.2 Gbps, can support UHD (2160p) at 60 fps, but only with 8-bit color and 4:2:0 subsampling.



Anything above the double line in this table can be conveyed with current HDMI hardware; anything below the double line requires new hardware that isn't available yet.


Most of the presenters advocated for UHD to adopt the entire Rec.2020 suite of parameters, including a resolution of 3840x2160, the specified color gamut (if not XYZ), frame rates up to 120 fps, at least 10-bit color (preferably 12-bit), and 4:2:2 subsampling (if not 4:4:4).


However, HDMI 2.0 at 18 Gbps can't accommodate all these upgrades, so we face a dilemma—increase HDMI 2.0's data rate, abandon HDMI for DisplayPort, or accept lower standards for UHD.


In my view, HDMI is too entrenched in the consumer-electronics market to be supplanted by anything else, so I'm afraid we may have to settle for less than the best possible UHD experience, at least until HDMI is upgraded yet again, which I can't imagine happening any time soon.


Text by Scott Wilkinson, avs
http://www.avsforum.com/t/1496765/smpte-2013-uhd-symposium

Bomb_Dance

居然連HDMI 2.0都不夠用？

不過剛剛出了HDMI 2.0，最少要下年才有升級版本吧？
看來還是要再多等一會了。

r32

Bomb_Dance 發表於 2013-10-29 11:49
居然連HDMI 2.0都不夠用？

不過剛剛出了HDMI 2.0，最少要下年才有升級版本吧？

如果將來P記出部日版4KBDP有DP, 隊入去TC-L65W600, 播佢獨家嘅MGVC BD / 4KBD, 咪可以繞過HDMI囉.
睇嚟可能性極高.

chhanthony

4K Rec 2020 12bit 可能要叫 F(ull)UHD
8K Rec 2020 12 bit 可能會叫T(rue)UHD

http://en.wikipedia.org/wiki/Ultra_High_Definition_Television

On October 4, 2013, DigitalEurope, announced the requirements for their UHD logo in Europe.[127] The DigitalEurope UHD logo will require that the display support a resolution of at least 3840×2160, a 16:9 aspect ratio, the Rec. 709 (HDTV) color space, 8-bit video, 24p/25p/30p/50p/60p frame rates, and 2 channel audio.[127]

Bomb_Dance

chhanthony 發表於 2013-10-29 12:38
4K Rec 2020 12bit 可能要叫 F(ull)UHD
8K Rec 2020 12 bit 可能會叫T(rue)UHD  

一早知道現在所有4K廠家都在出口術

現在根本沒有ITU-R BT.2020色域的4K電視/投影……

lucahk

一早知道現在所有4K廠家都在出口術
現在根本沒有ITU-R BT.2020色域的4K電視/投影…

Ching,
即係市面所有4K電視得Resolution, Frame Rate 跟到 REC.2020, 其他用番REC.709(HDTV) spec. 呢?

Bomb_Dance

lucahk 發表於 2013-10-29 15:40
Ching,
即係市面所有4K電視得Resolution, Frame Rate 跟到 REC.2020, 其他用番REC.709(HDTV) spec. 呢?
...

現時的4K電視/投影一般都會標榜「廣色域」，但實際上卻只是比ITU-R BT.709色域廣，還是遠遠比不上ITU-R BT.2020的色域標準。

gikifk

早買早享受喇...........................年年都有新野