ITU-T BT.2020
BT.2020 or Rec. 2020 is an ITU-R recommendation forUltra HDTV( UHDTV). BT.2020 contains all the specifications required for the creation, transmission and distribution of UHD signals. These include resolution, refresh rate, digital representation, color space, color depth, and audio formats.
UHDTV is characterized by its extremely high resolution, which is 3,840 × 2,160 pixels for UHD-1, the 4K standard, and 7,680 × 4,320 pixels for UHD-2, the 8K standard. The frame rates can be 24 Hz, 25 Hz, 30 Hz, 50 Hz, 60 Hz, and 120 Hz in progressive scan, and the color depth can be 10 bits or 12 bits for each color component.
In terms of color reproduction, the Ultra High Definition (UHD) color space can represent more colors than the color space of HDTV specified in BT.709 because it covers a much larger color area in the CIE color space. In this color space, the white pointis at coordinates 0.312/0.329 at 6,500 K, and is referred to as standard illuminant D65. The xy coordinates for red are 0.708/0.292, for green 0170/0.797, and for blue 0.131/0.046.
The BT.2020 recommendation, BT stands for Broadcasting Television, represents the production and exchange of video in Ultra High Definition (UHD) format. It supports the international exchange of UHD productions and the display on UHD televisions.