Luma and Chroma Encoding Using Common Predictor

The patent applies the luma coding algorithm to all three color components (Y, Cb, Cr) instead of using separate chroma coding algorithms. This universal approach allows the more efficient luma coding tools to be applied across all components, improving compression efficiency while maintaining algorithmic simplicity. The same prediction and transformation processes used for luma are now applied to chroma components as well.

By using the luma coding algorithm for all three color components, the patent achieves better compression quality and reduced bit usage. The operational simplicity is maintained because the same coding process is applied uniformly to all components, eliminating the need for separate chroma coding operations while improving the quantity of bits required for encoding.

The patent removes the residual color transform (RCT) from the coding process entirely. By extracting this complex processing step, the patent reduces device complexity and processing overhead. The color accuracy is maintained through the use of luma coding algorithm on all components, which provides sufficient precision without requiring the additional RCT processing stage.

The patent applies the same spatial prediction mode to all three color components, using the luma coding algorithm uniformly. This universal prediction approach maintains coding precision because the luma algorithm is applied to all components, while significantly reducing device complexity by eliminating the need for separate prediction mode processing for different color components.