4K 疑惑

chhanthony

就算將來推出4K嘅載具都係用Blu-ray，但相信現時無一部Blu-ray Player可以讀到4K Blu-ray，
因為4K嘅編碼好大可能係用H.265，現時未有機可以解到。

一啲4K Re-Master嘅舊片就好似一啲K2HD、Blu-spec CD咁都係離唔開現時CD/Blu-day嘅格式限制，
而4K只係一個籠統嘅叫法，真正嘅UHD除咗4K解像度外(4096 * 2160 / 3840 * 2160) 重有係個色域係行REC.2020而唔係依家行實嘅REC709

睇睇下面幅圖，外面嘅黑線係UHD嘅standard色域REC2020而入面黑線係現時FULL HD嘅色域REC709，睇下大幾多。

The Rec. 2020 (UHDTV) color space can reproduce colors that can not be shown with the Rec. 709 (HDTV) color space.[6] In coverage of the CIE 1931 color space the Rec. 2020 color space covers 75.8%, the digital cinema reference projector color space covers 53.6%, the Adobe RGB color space covers 52.1%, and the Rec. 709 color space covers 35.9%.[6] Rec. 2020 allows for frame rates up to 120 frames per second (fps).[13][3]

現時4K TV就好似早年嘅HD Ready電視，過往買過非Full HD(720P)電視嘅朋友應該有呢類經驗。
但當然就算唔係UHD standard都好，現時4K電視/projector嘅影像一定有非常好嘅表現，
因為出得4K一定係旗艦型號。

reference

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

just my 2 cents.

bigair

ilavbnm 發表於 2013-6-19 12:52
貓哥無理由唔捧場o既...
sony喎...莫講話屯門啦...沙頭角都應該去啦...  ...

我真係想去架，不過個日咁岩約左fd去睇中大畢業展，唔知睇完趕唔趕到黎

frankiepoon

ilavbnm 發表於 2013-6-19 12:46
規格上BD可以做到4層...容量最高可以去到128G
不過...規格歸規格...實際是否可行&兼容性如何?
真係要等業 ...

3層100GB BDXL既碟同支援既燒碟機一早出左啦:
http://www.techbang.com/posts/4142-pioneer-first-bdxl-bdr-206mbk


Pioneer BDR206-MBK Blu-Ray BDXL Writer
US$165.99
http://www.amazon.com/gp/product/B004P2Y7MQ/

TDK Blu-ray Disc - BD-R XL 100GB 4X Speed 1 Pack Printable - Triple Layer
US$45.00
http://www.amazon.com/TDK-Blu-ra ... iple/dp/B0041CJMRU/

BDXL既錄影機日本仔已經玩左好耐:
http://techcrunch.com/2010/11/03 ... l-blu-ray-recorder/

frankiepoon

bigair 發表於 2013-6-19 12:18
4K係2K既 4倍，一般普通BD 20-25G，3D要多一倍，差唔多要50G，咁4K咪要80G - 200G，我諗BD未必裝到 ...

我記得之前AVS Forum既Editor話Sony部4K Player入邊既4K Amazing Spider-man係56GB到~
當然係一條Video+HD Sound啦, 而家出既4K Mastered都包兩條HD Audio, side晒d位~而且用H265又會用少好多位~
http://www.avsforum.com/a/sony-l ... verage-at-the-event

Sony is including with the TV a media server with 4K content, and they will deliver more content for that server. Also, I learned after I posted this that the 4K Spider-Man on the server occupies about 56GB, much less than 4 times the Blu-ray version at 36GB, probably due to the use of a much more efficient codec. I don't what codec was used in this case; I'll try to find out.

manKi

chhanthony 發表於 2013-6-19 13:23
就算將來推出4K嘅載具都係用Blu-ray，但相信現時無一部Blu-ray Player可以讀到4K Blu-ray，
因為4K嘅編碼好 ...

chhanthony兄...thanks

giseegoobi

去到大王有禮物送來自: iPhone客戶端

ilavbnm

frankiepoon 發表於 2013-6-19 13:41
3層100GB BDXL既碟同支援既燒碟機一早出左啦:
http://www.techbang.com/posts/9792-pioneer-blu-ray-12x ...

真係無留意添...
是否兼容現時o既BDP規格...

frankiepoon

ilavbnm 發表於 2013-6-19 14:10
真係無留意添...
是否兼容現時o既BDP規格...

BDP就唔知, 因為係燒碟媒介, 所以日本既BD Recorder就一早支援
http://techcrunch.com/2010/11/03 ... l-blu-ray-recorder/
Sony, Panasonic, Sharp都有出

ilavbnm

frankiepoon 發表於 2013-6-19 14:12
BDP就唔知, 因為係燒碟媒介, 所以日本既BD Recorder就一早支援
http://techcrunch.com/2010/11 ...

燒data同電影BD好似有d唔同喎...{:9_424:}
即係...可兼容性機會唔大...再即係...將來又要換機啦...

ilavbnm

bigair 發表於 2013-6-19 13:34
我真係想去架，不過個日咁岩約左fd去睇中大畢業展，唔知睇完趕唔趕到黎  ...

咦...原來你就係傳說中o既貓哥...
由於貓哥已多次轉換身份
所以...依家我都唔知邊個先係貓哥...失敬...失敬...


P.S...之前o既貓哥...好似反而唔用貓做頭像喎...