IEC 61966-2-4:2006/COR1:2006

IEC 61966-2-4
(First edition – 2006)

Multimedia systems and equipment – Colour measurement and management
Part 2-4: Colour management – Extended-gamut YCC colour space for video applications – xvYCC

CORRIGENDUM 1

Page 8
4.4 Digital quantization methods
Replace the existing note after equation (7) by the following new note:
N-8 N-8 N
NOTE Bit levels “from 0 to 2 -1” and “from 255 × 2 to 2 -1” (0 and 255, for the case of 8-bit
encoding) are used exclusively for synchronization and are not allowed for storing colour values. Levels
N-8 N-8
from “2 ” to “255 × 2 -1” (from 1 to 254, for the case of 8-bit encoding) are available.
Page 9
5.2 Transformation from xvYCC values to CIE 1931 XYZ values
Replace, on page 10, the inequality signs for equations (12), (13) and (14) as follows:
′ ′ ′ ′ ′ ′
From R ,G , B < −0,081 to R ,G , B ≤ −0,081
From −0,081 ≤ R′,G′, B′ ≤ 0,081 to −0,081 < R′,G′, B′ < 0,081
′ ′ ′ ′ ′ ′
From R ,G , B > 0,081 to R ,G , B ≥ 0,081
Page 13
Replace the existing Annex A, by the following new Annex A:
Annex A
(informative)

Compression of specular components of Y’ signals

This annex describes an example method for the dynamic range compression of the specular
′
components that are brighter than white in Y (or Luma) signal.

In xvYCC colour encoding, linear R,G, B values after equation (8), or non-linear R′,G
...