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BT.2020
Reference Name: ITU-R BT.2020
Definition: ITU-R Recommendation BT.2020 (2015)
Responsible Organization: International Telecommunication Union.
Contact Information:
ICC Technical Secretary
email: [email protected]
DOCUMENTATION
Documentation source ITU-R BT.2020 : Parameter values for ultra-high definition television systems for production and international programme exchange. .
Also see ITU-R BT.2087-0 Colour conversion from Recommendation ITU-R BT.709 to Recommendation ITU-R BT.2020
ENCODING CHARACTERISTICS
Color space
Type: Colorimetric RGB color space
Color gamut: extended (ITU-R BT.2020)
RGB primaries:| x | y | z | |
| R | 0.708 | 0.292 | 0.0 |
| G | 0.17 | 0.797 | 0.033 |
| B | 0.131 | 0.046 | 0.823 |
Color component transfer function: C'= C1/2.4
NOTE: The reference electro-optical transfer function for a Rec.2020 display is defined in ITU-R BT.1886. Some implementors use the inverse of the OETF as defined in BT.2020 (BT.2087 case #2) in place of ITU-R BT.1886.
White point luminance: variable
NOTE: The 10-bit signal level that should be measured for the display peak white, "super white" and black are defined in EBU 3325
White point chromaticity: x = 0.3127, y = 0.3290 (D65)
Encoding
Range: linear RGB: 0.0 to 1.0
Bit depth: 10 or 12
Image state: Output-referred
Reference viewing environment
Viewing surround: ratio of luminance of background behind picture monitor to peak luminance of picture: = between 10% ± 2% of reference white value
Ambient illuminance: 10 lux
Background chromaticity: x = 0.3127, y = 0.3290 (D65)
NOTE: background chromaticity is optionally D93 in some regions
Reference medium
White point luminance: unspecified
White point chromaticity: x = 0.3127, y = 0.3290 (D65)
Black point luminance: unspecified
Black point chromaticity: unspecified
PROFILES
A profile for the ITU-R BT.2020 Reference Display is here
Note for profile builders
The diffuse white point of the medium should be mapped to the PCS white point in the profile.
The chromaticities of the primaries for Rec.2020 yield negative tristimulus values when the D65-to-D50 chromatic adaptation matrix is applied. Negative XYZ values are technically not permitted by the v4 ICC specification, but can in practice be used in most CMMs without problems.
