International Color Consortium
Members
Getting Started
V4
iccMAX
Making color seamles between devices and documents
ICC Specifications
Technical Notes
ICC Resource Center
ICC Slide Presentation
ICC Logos
Information on Profiles
ICC White Papers
Color Management Links
Member List
ICC Working Groups
FAQ
Forum
Home
Search ICC:
 
Got a question about ICC Profiles or colour management?

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: green@colourspace.demon.co.uk


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.