Table 3.8 (Continued)

IEC 61966-2-4 3.13 xvYCC

CIE chromaticities for reference primary colors and reference white

x

y

Red

0.640

0.330

Green

0.300

0.600

Blue

0.150

0.060

White D65

0.3127

0.3290

Opto-electronic transfer characteristics

If , then:

)

Else if , then:

4

Else if , then:

YCC encoding methods

xvYCC601 for applications SDTV (ITU-R BT.601-5):

xvYCC709 for applications HDTV (ITU-R BT.709-5):

Digital quantization methods

For 8-bit representation:

For n-bit (n>8) representation:

Note: Bit levels “from 0 to ” and from “ to ” (0 and 255 in the case of 8-bit encoding) are used exclusively for synchronization and are not allowed for storing color values. Levels from to (from 1 to 254, in the case of 8 bit encoding) are available.

Transformation from xvYCC values to CIE 1931 values

For 8 bit/channel encoding:

For N bit/channel encoding (N > 8):

For encoding:

For encoding:

For

For

For

Transformation from CIE 1931 XYZ values to xvYCC values

If :

Else if :

Else if :

For 8 bit/channel representation (the resulting values shall be limited to a range from 1 to 255):

For N-bit (N > 8) representation (the resulting values shall be limited to a range from to ):

IEC 61966-2-5 3 opRGB

Reference image display system characteristics

Display luminance level

160 cd/m²

Display model offset (R, G and B)

0.0

Display input/output characteristics (R, G and B)

2.2

Display primaries

x

y

Red

0.640

0.330

Green

0.210

0.710

Blue

0.150

0.060

Display white point ( )

152.07

160.00

174.25

0.3127

0.3290

Display black level

0.4 cd/m²