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本帖最后由 medion 于 2019-1-4 05:23 编辑
是啊~你也清楚,但是DCIP3现行设备用的还是gama2.2, st1886,所以~如果是HDR,怎么可能会映射到DCIP3上???HDR的基础就是PQ曲线,这也是SDR和HDR最本质的区别?你可以看看~包括HLG格式都是直接往BT2020上直接套的
HDR影片本身或者设备本身不会强行开销把2020转映到DCIP3上!BT2020覆盖不全根本不是问题,~超过设备色域的极限的饱和度,都是映射到边界,这点有疑问吗?而能最大映射的范围是这个显示设备能显示色域的最大范围,DCI P3范围也好~NTSC范围也好
比如这样~ 借用R网的Z9F
来来来来~我找了段话,看看~
- Rec 709 Color Space
ITU-R Recommendation BT.709, first approved in 1990 and often referred to as Rec. 709 or BT.709, standardizes the format of High Definition Television (HDTV). This color space is identical to the sRGB color space and covers 35.6% of the CIE 1931 color space. All HD displays should be able to cover 100% of the Rec. 709 color space. - DCI/P3 Color Space
DCI-P3 is a popular high dynamic range (HDR) RGB color space that was introduced in 2007 by SMPTE and features a color gamut much wider than Rec. 709, covering 45.5% of all colors perceptible to humans as per the CIE 1931 color space. All Digital Cinema Projectors are capable of displaying the entire DCI P3 color space.
DCI/P3 has assumed importance in recent times since this is the reference color gamut for current ‘Ultra HD Premium TV’s, which are expected to support at least 90% of the DCI/P3 color space with a minimum brightness of 0.05nits and maximum brightness of 1000nits. - The Rec. 2020 color space
ITU-R Recommendation BT.2020, more commonly known by the abbreviations Rec. 2020 or BT.2020 is the de facto standard for HDR10 which defines various aspects of UHDTV such as resolution, frame rates, bit depth, chroma subsampling and color space. The associated color space is also commonly referred to as Rec. 2020. It covers 75.8% of all colors perceptible to humans as per the CIE 1931 xy color space.
In August 2015, the Consumer Electronics Association (CEA) standardized the HDR10 Media Profile format for all HDR compatible display devices. Support for REC.2020 color primaries and ST2084 EOTF transfer characteristics are essential to this format.
首先ITU的定义就已经说明了一切~种种迹象来看,DCIP3就是一个缓冲过渡,毕竟让流行设备完全覆盖BT2020不是件容易的事情!
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