44.6.14 Color Space Conversion (CSC) Module

By converting an image from RGB to YCbCr color space, it is possible to separate Y, Cb and Cr information. The CSC samples the gam_data[29:0] 30-bit data bus, extracts YCbCr information from the sampled data, and then generates the color-converted data csc_data[29:0] and the validity signal csc_valid.


ISC_CSC_CTRL.ENABLE	CSC_DATA Slice	Value
0	csc_data[29:0]	gam_data[29:0]
1	csc_data[29:20]	Y = clipped(sum(gam_data_x * gain_Yx) + offset_y << 2)
	csc_data[19:10]	Cb = clipped(sum(gam_data_x * gain_Cbx)+offset_cb << 2)
	csc_data[9:0]	Cr = clipped(sum(gam_data_x * gain_Crx)+offset_cr << 2)

[\begin{matrix} Y \\ CB \\ CR \end{matrix}] = [\begin{matrix} YR & YG & YB \\ CBR & CBG & CBB \\ CRR & CRG & CRB \end{matrix}] \times [\begin{matrix} gam_data[29:20] \\ gam_data[19:10] \\ gam_data[9:0] \end{matrix}] + [\begin{matrix} YOFST \\ CBOFST \\ CROFST \end{matrix}]