基于块匹配的H.264/AVC帧内预测算法

Improved intra prediction of H.264/AVC based on block matching algorithm

基于H.264/AVC标准的帧内预测算法是一种减小宏块间空间冗余的预测算法。针对进一步提高H.264/AVC帧内预测性能的问题,提出了一种基于块匹配算法的帧内预测算法,该算法将帧内预测中的DC模式与BM模式两种模式相结合,形成了一种新的预测模式,替代了原有的帧内预测中的模式2。并应用H.264标准的相关参考软件JM18.2对算法性能做了测试。测试结果表明,相较于标准的H.264/AVC算法,该算法可从总体上提高峰值信噪比0.1 dB^0.4 dB,有效地改善了编解码性能。

The intra prediction algorithm based on H.264/AVC standard is a method of reducing spatial redundancy between macroblocks.Aiming at the performance of intra prediction,a block-matching based intra frame prediction algorithm was proposed.The mode 2 of H.264’s standard prediction methods was replaced by a block-matching algorithm （BM）-DC novel mode.And the reference software JM18.2 was applied to do the test.The results indicate that this method could improve the PSNR by 0.1 dB～0.4 dB.Significant improvement of coding performance can be gained compared to the H.264 algorithm.