一种快速的H.264/AVC帧内预测模式选择算法

H.264/AVC采用RDO技术选择帧内和帧间预测模式以进一步提高编码的效率,取得显著效果,但同时大幅度增加了预测的复杂度。该文提出一种RDO模式下的快速Intra_4x4模式选择算法,该算法根据SATD特征以及相邻块的预测模式之间的相关性,可以预先排除约50%可能性小的Intra_4x4模式,避免了不必要的代价(RD_Cost)计算,从而大幅度降低帧内预测的复杂度,同时基本保持了H.264/AVC的编码性能。

A Fast Intra-Frame Prediction Mode Selection Algorithm of H.264/AVC

H.264/AVC employs RDO technique to select intra and inter prediction modes in order to enhance coding efficiency further,but it also increases prediction complexity drastically.In this paper,we propose a fast Intra_4x4 mode selection algorithm based on RDO.The Algorithm uses block's SATD and employs correlation between prediction modes of adjacent blocks to filter out about 50% less probable modes beforehand.This avoids unnecessary RD_Cost computation,and accordingly reduces the intra prediction complexity greatly.At the same time,almost the same coding performance comparing with H.264/AVC is kept.