7.3. YCrCb to RGB Color Conversion (HDTV)
Color information recorded in the color palette provided by each PGC is encoded
as luminance and color difference coded signals (YCrCb). This encoding is popular
among many component video systems and is used by the DVD-Video standard.
The reason for using YCrCb signal is that the human eye is less sensitive to
chrominance than luminance. Compression algorithms can take advantage of this
phenomenon and subsample the values of Cb and Cr without significant visual
degradation of the original color signal.
On computers, color information is recorded as red-green-blue signal (RGB).
Use the following equation to approximate the converted values of YCrCb color
information into the RGB components. The coefficients in the equation are
recommended by the ITU-R
BT.709-5 standard for HDTV.