Rec2020ST

Rec2020ST is not an official ITU-R specification. The term occasionally appears in product literature and discussions as a nonstandard shorthand related to the Rec.2020 color space, but there is no formal standard by that name in ITU-R BT.2020, SMPTE, or IEC documentation. Because meanings vary, a precise definition should be sought from the source.

In context, Rec.2020 refers to the ITU-R BT.2020 standard that defines a wide color gamut for UHDTV and HDR-capable systems. It uses color primaries and a white point specified by the standard, and is typically deployed with transfer functions described in ITU-R BT.2100 (PQ or HLG) for high dynamic range, and with bit depths of 10 or 12 bits in modern pipelines. Rec.2020 is the basis for many UHD content workflows, televisions, and professional displays.

The "ST" designation attached to Rec2020 in nonstandard usage may indicate studio-oriented workflows, signal transport variants, or vendor-specific variants. However, because it is not recognized as a formal standard, the exact meaning is not consistent across sources. When encountering Rec2020ST, it is advisable to verify the context and source to determine what specific properties (gamut, transfer function, bit depth, matrix, etc.) are being referred to.

See also: Rec.2020, Rec.2100, BT.2020, HDR, color space, ITU-R.