基于时间相关的H.264帧内预测算法*

为了降低H.264编码器的计算复杂度，提出了一种快速帧内预测模式选择算法，通过分析帧内预测模式在时间和空间上的相关性，将已编码帧中宏块的帧内预测模式作为当前宏块的候选预测模式，减少了计算的开销。实验结果表明，在图像性能和码率变化不大的情况下，编码时间减少约10%，有利于实时编码的实现。

Intra prediction algorithm for H.264 based on temporal correlation

In order to reduce the computational complexity, this paper proposed a fast algorithm for the intra-prediction mode selection. By analyzing the spatial correlation and temporal correlation of intra-frame prediction mode, the algorithm used intra-frame prediction modes of macro-blocks in coded frames as the candidate modes of current macro-block, which reduced the cost of computation. Experimental results show that the coding time reduces about 10% without obvious PSNR change.