摘要： 为降低高效视频编码(HEVC)帧间预测编码的计算复杂度,提出一种快速编码单元(CU)深度选择算法。利用当前CU与时空域相邻CU的深度信息,初步预测当前CU的深度范围,并根据当前CU与邻近CU的运动矢量信息对当前CU深度选择做进一步终止判断。实验结果表明,该算法与HEVC测试模型(HM16.0)相比,在低时延和随机访问2种编码配置下,码率分别仅增加0.93%和1.01%,而编码时间减少了29.1%和30.3%。

关键词: 高效视频编码, 帧间预测, 计算复杂度, 编码单元, 深度选择, 运动矢量

Abstract: In order to reduce the computational complexity of High Efficiency Video Coding(HEVC) inter-frame prediction,a fast Coding Unit(CU) depth selection algorithm is proposed in this paper.Firstly,the spatio-temporal correlation of depth information among the current CU and adjacent CU is used to preliminary forecast the depth of the current CU.Secondly,the CU depth of current CU is judged further for stop based on the Motion Vector(MV)information of current CU and adjacent CU.The experimental results demonstrate that,compared with the HEVC test model(HM16.0),under two coding structures of low-delay and random-access,the proposed algorithm increases bit rate by 0.93% and 1.01% and saves coding time by 29.1% and 30.3%,respectively with the same objective quality.

Key words: High Efficiency Video Coding(HEVC), inter-frame prediction, computational complexity, Coding Unit(CU), depth selection, Motion Vector(MV)

中图分类号: 

• TN919.8