BT.2020: what it is, how it works and what it does
BT.2020 is an ITU-R standard defining the ultra-high gamut (UHG) color space for ultra-high definition (UHD) television systems. It is used as an HDR format in display devices to expand the range of representable colors.
Definition and Principles
BT.2020 is a technical standard developed by the International Telecommunication Union (ITU-R) that specifies the ultra-high gamut (UHG) color space for ultra-high definition (UHD) television systems. Unlike previous color spaces, BT.2020 covers a much wider spectrum of colors, allowing for the representation of more vibrant and realistic tones.
Functioning and Architecture
The standard defines the primary color points (red, green, and blue) and the reference luminance required for video signal encoding and decoding. Its architecture is based on expanding the color triangle in the CIE xy diagram, which allows including colors that are not reproducible in standard gamut standards (such as BT.709).
Applications and Scope
- HDR Format: BT.2020 is used as an HDR (High Dynamic Range) format in display devices, as evidenced by technical specifications of screens listing
display_hdr_formats = HDR BT.2020. - UHD Television: It is the reference color standard for the production and transmission of 4K and 8K content.
Limitations and Interpretation
The presence of BT.2020 in a product indicates that the device supports or is designed to handle ultra-high gamut content. However, the ability of a monitor or television to reproduce 100% of the BT.2020 color space varies depending on the panel technology used. The mention of the standard in a product's specifications confirms its compatibility with this extended color format, although it does not guarantee full color space coverage without further technical data.
Note: Cited sources confirm the presence of BT.2020 as an HDR format in screen specifications, but do not detail the percentage coverage of the color space.