38.6.8 Color Space Conversion Unit

The color space conversion unit converts Luminance Chrominance color space into the Red Green Blue color space. The conversion matrix is defined below and is fully programmable through the LCD user interface.

[\begin{matrix} R \\ G \\ B \end{matrix}] = [\begin{matrix} CSCRY & CSCRU & CSCRV \\ CSCGY & CSCGU & CSCGV \\ CSCBY & CSCBU & CSCBV \end{matrix}] ∙ [\begin{matrix} Y - Yoff \\ Cb - Cboff \\ Cr - Croff \end{matrix}]

Color space conversion coefficients are defined with the following equation:

{CSC}_{ij} = \frac{1}{2^{7}} \cdot [{- 2}^{9} \cdot c_{9} + \sum_{n = 0}^{8} c_{n} \cdot 2^{n}]

Color space conversion coefficients are defined with one sign bit, 2 integer bits and 7 fractional bits. The range of the CSCij coefficients is defined below with a step of 1/128.

- 4 \leq {CSC}_{ij} \leq 3.9921875

Additionally, a set scaling factor {Yoff, Cboff, Croff} can be applied.