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BT.601

Reference Name: ITU-R BT.601

Definition: ITU-R BT.709-6: Studio encoding parameters of digital television for standard 4:3 and wide-screen 16:9 aspect ratios.

Responsible Organization: International Telecommunication Union

Contact Information:
ICC Technical Secretary
email: [email protected]


DOCUMENTATION

Documentation source ITU Recommendation BT.601-7 (03/2011)


ENCODING CHARACTERISTICS

Color space

Type: Colorimetric RGB color space

RGB primaries:
525-line625-line
    x   y   z     x   y   z
R 0.630.340.03   0.640.330.03
G 0.310.5950.095   0.290.600.11
B 0.1550.070.775   0.150.060.79

Color component transfer function: 2.4 gamma

White point luminance: 100 cd/m2

White point chromaticity: x = 0.3127, y = 0.3290 (D65)

Encoding Range: linear RGB: 0.0 to 1.0

Bit depth: 8

Image state: Output-referred (CRT)


PROFILES

Profiles for the Rec. 601 Display are available:
BT601_525-line.icc
BT601_625-line.icc

Note that 525-line and 625-line encodings were previously designated NTSC and PAL respectively in ITU-R BT.1700.


HINTS FOR PROFILE MAKERS

See Transforming via the ICC PCS for details on the derivation and use of D50 adapted data, chromatic adaptation matrix and measurement corrections.