A Fast Intra-prediction Mode Selection Algorithm Based on H.264/AVC
Guang Xiao, Guowei Teng, Guozhong Wang · 2005
In H.264/AVC,intra-prediction is used to improve the coding efficiency of I-frame.There are one size of(8×8) for the chroma block and two sizes including 4×4 and 16×16 for the luma block.Each kind of block provides many prediction modes,so that this multi-mode selection increases the coding complexity greatly while improving coding efficiency.In this paper,a fast intra-prediction mode selection algorithm with different criterion based on RDO(Rate distortion optimization) is proposed using the mode selection relation of chroma block and luma block and the relation of luma 4×4 block and luma 16×16 block.Experiment results show that our proposed algorithm can averagely speed up to 6 times while maintaining similar PSNR and bit rate.