13.2.4.7 YIQ Conversion

The YIQ color space is used in U.S. color television broadcasting. Conversion from RGBA to YIQA may be accomplished using the color matrix:

$$\left[ \begin{array}{c} Y \\ I \\ Q \\ A \end{array}\right... ...left[ \begin{array}{c} R \\ G \\ B \\ A \end{array}\right]$$

(Generally, YIQ is not used with an alpha channel so the fourth component is eliminated.) The inverse matrix is used to map YIQ to RGBA [27].