44.6.15 Contrast, Brightness, Hue and Saturation
This module is for YUV formats purpose. Brightness Offset allows the Luminance to be adjusted. Hue is used for Chroma phase adjustment, and Color Saturation for Chroma amplitude. Contrast gain is applied on all pixel components (Luma and Chroma). The CBHS samples the csc_data[29:0] 30-bit bus when csc_valid is asserted and generates cbhs_data[29:0] with the validity signal cbc_valid.
| ISC_CBC_CTRL.ENABLE | ISC_CBC_CFG.CCIR | CBC_DATA Slice | Value |
|---|---|---|---|
| 0 | 0 | cbc_data[29:0] | csc_data[29:0] |
| 1 | 0 | cbc_data[29:20] | Y = clipped(contrast * (csc_data[29:20]+brightness)) |
| cbc_data[19:10] |
Cb = clipped( saturation * contrast * (csc_data[19:10]*cos(hue)+csc_data[9:0]*sin(hue) ) |
||
| cbc_data[9:0] |
Cr = clipped( saturation * contrast * (csc_data[19:10]*sin(hue)-csc_data[9:0]*cos(hue) ) |
||
| 1 | 1 | cbc_data[29:10] | 0 |
| cbc_data[9:0] | ccir656 stream with luminance correction |