HEVC帧内预测编码的快速CU决策算法

提出一种快速编码单元(CU)修剪方法和CU深度范围决策方法.在快速CU修剪方法中,根据贝叶斯决策准则,基于残差信息Hadamard变换绝对值之和(SATD)提前结束CU的修剪;在CU深度范围决策方法中,根据当前CU深度与空间邻近CU深度的相似性决策当前CU深度级范围.通过在HM10.1的实验证明:文中方法相比于HM10.1的标准代码,能降低35.9%的编码时间,且BDBR的增加仅为1.039%.

Fast CU Decision Algorithm for HEVC Intra Prediction Coding

In this paper, a fast coding unit(CU)pruning and depth levels decision method is proposed. The early CU pruning method is performed according to a Bayes decision rule method based on the absolute sum of Hadamard transformed coefficients of the residual signal(SATD). Based on the depth information resemblance between spatio adjacent CUs and the current CU, some depths can be excluded. Experimental results show that the proposed algorithm achieves 35.9% encoder time saving on average compared to the original coding in HM10.1 with only 1.039% bit rate increment in coding performance.