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Region based inter-color intra prediction for RGB signals

High-fidelity video coding tends to adopt the RGB coding, which directly reduces RGB inter-color redundancy without external color space conversion. This paper presents a region based inter-color prediction scheme for RGB signals, which treats G component as primary component and predicts B/R component from G component with different translation offsets based on different texture regions. Experimental results show that compared with H.264/AVC intra coding algorithm, the proposed algorithm can save an average of about 13.64% bits with limited PSNR loss for most high resolution video sequences and with much better PSNR gain for certain testing material. Meanwhile, the complexity of the proposed algorithm is much less than H.264/AVC intra prediction technique in independent mode.