关键词: H.264/AVC, 模式选择, 帧内预测, 纹理

Abstract: To simplify the high computational complexity of intra mode selection for H.264/AVC high profile，a novel fast intra mode decision algorithm based on texture information is proposed in this paper.First，the block size mode can be predicted by MB’s texture complexity which is detected by the mean of absolute differences；then，the candidate prediction modes can be selected by the texture direction which is detected by the mean of absolute adjacent-pixel-difference.Experimental results show that the computational complexity of intra mode selection can be reduced effectively when the above two parts work independently with the encoding speed improved about 27% and 64% respectively，while the effection on RD performance is very slightly.The integrated algortihm can make the speed of intra coding improve over 70% with almost the same RD performance.

Key words: H.264/AVC, mode decision, intra prediction, texture