![]() These were first proposed by NHK Science & Technology Research Laboratories and later defined and approved by the International Telecommunication Union (ITU). Ultra-high-definition television (also known as Ultra HD television, Ultra HD, UHDTV, UHD and Super Hi-Vision) today includes 4K UHD and 8K UHD, which are two digital video formats with an aspect ratio of 16:9. ![]() Both Rec. 2020 and Rec. 709 use Illuminant D65 for the white point. 709 (HDTV) color space in the inner triangle. ![]() 2020 (UHDTV) color space in the outer triangle and Rec. Diagram of the CIE 1931 color space that shows the Rec.
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