一种基于HEVC帧内预测模式快速选择算法  

A fast-intra prediction mode selection algorithm based on HEVC

作　　者：袁国良[1] 陈慧 

机构地区：[1]上海海事大学信息工程学院,上海201306

出　　处：《微型机与应用》2017年第19期52-54,61,共4页Microcomputer & Its Applications

摘　　要：在保证编码性能前提下减少帧内编码复杂度是当前研究的热点。因此一种帧内预测模式快速选择算法被提出。首先基于边缘方向强度,将帧内预测模式按照基本方向进行初筛,然后结合累积梯度和最终确定帧内预测模式,从而降低了率失真优化所带来的计算复杂度。实验结果表明,整体编码时间相对于参考算法减少大约20%~25%。In the premise of ensuring encoding performance,reducing intra-frame coding complexity is a current reseapresents a fast intra prediction mode selection algorithm. Based on edge directional strength,the intra-jDrediction mode is screened in accord-ance witli the basic direction of the prediction modes. Then, combined with the accumulated gradient to finalize the intra-prediction mode, which reduces the computational complexity caused by rate distortion optimization. Experimental results show duces by about 20% to 25% compared with the reference algorithm.

关 键 词：HEVC 帧内预测 率失真性能 方向强度 

分 类 号：TN919.81[电子电信—通信与信息系统]