基于纹理方向的HEVC快速帧内算法

摘要

针对HEVC帧内编码算法的高复杂度,提出一种快速帧内算法.首先采用改进梯度算子,将预测单元的35种预测模式缩小到11-12种;再利用上下层编码块的纹理相似度和本层编码块的复杂度,提前结束编码单元的递归划分.实验结果表明,本文算法和测试平台HM13.0原始算法相比,编码时间平均较少了35%,同又时保持了较高的编码质量.%A fast intra coding algorithm is proposed to reduce the high complexity of high efficiency video coding (HEVC). Firstly with the improved gradient operator, reduce 35 intra prediction modes to 11-12. Taking use of the texture similarity of the lower coding block to the upper, and the the complexity of the current coding block, then early terminate the recursive partitioning of coding units. Experimental results show that the algorithm in this paper saves encoding time of 35% on average compared to the original algorithm of HM13.0, maintaining a higher quality of encoding.