![]() ġ2 bits per sample Rec. 2020 uses video levels where the black level is defined as code 256 and the nominal peak is defined as code 3760. Codes 4 through 63 provide video data below the black level while codes 941 through 1,019 provide video data above the nominal peak. Codes 0–3 and 1,020–1,023 are used for the timing reference. ġ0 bits per sample Rec. 2020 uses video levels where the black level is defined as code 64 and the nominal peak is defined as code 940. Rec. 2020 defines a bit depth of either 10 bits per sample or 12 bits per sample. Only progressive scan frame rates are allowed. These both have an aspect ratio of 16:9 and use square pixels. Rec. 2020 is extended for high-dynamic-range (HDR) by Rec. 2100, which uses the same color primaries as Rec. 2020. The first version of Rec. 2020 was posted on the International Telecommunication Union (ITU) website on August 23, 2012, and two further editions have been published since then. ITU-R Recommendation BT.2020, more commonly known by the abbreviations Rec. 2020 or BT.2020, defines various aspects of ultra-high-definition television (UHDTV) with standard dynamic range (SDR) and wide color gamut (WCG), including picture resolutions, frame rates with progressive scan, bit depths, color primaries, RGB and luma-chroma color representations, chroma subsamplings, and an opto-electronic transfer function. Rec. 2020 uses Illuminant D65 for the white point. CIE 1931 chromaticity diagram showing the Rec. 2020 (UHDTV) color space in the triangle and the location of the primary colors.
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