A Fast Intra-prediction Mode Selection Algorithm Based on H.264/AVC[J]. Journal of Image and Graphics, 2005, 10(11): 1375. DOI: 10.11834/jig.2005011249.
A Fast Intra-prediction Mode Selection Algorithm Based on H.264/AVC
提出一种基于RDO(rate d istortion optim ization)的不同判决依据的快速帧内预测模式选择算法。实验证明
在信噪比和码率变化不大的同时
该算法可使编码速度平均提高6倍。
Abstract
In H.264/AVC
intraprediction 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 multimode selection increases the coding complexity greatly while improving coding efficiency. In this paper
a fast intraprediction 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 times while maintaining similar PSNR and bit rate.