基于运动特性的帧间预测模式快速选择算法  

Fast Inter-prediction Mode Selection Algorithm Based on Motion Characteristics

作　　者：黄涛涛 刘立程[1,2] 彭同壮 Huang Tao-tao;Liu Li-cheng;Peng Tong-zhuang(School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China;Synergy Innovation Institute for Modern Industries of GDUT,Heyuan 517500,China)

机构地区：[1]广东工业大学信息工程学院,广东广州510006 [2]东源广工大现代产业协同创新研究院,广东河源517500

出　　处：《广东工业大学学报》2020年第2期74-79,共6页Journal of Guangdong University of Technology

基　　金：广州市科技计划项目(201802020008)。

摘　　要：高效视频编码(High Efficiency Video Coding, HEVC)大部分编码时间消耗在帧间预测,为了缩短编码时间,本文提出了一种基于CU (Coding Unit)块运动特性的帧间模式快速选择算法。首先,运用本文定义的运动特征对帧间预测模式分类;然后让CU进行尺寸N×N的帧间预测,获取子PU (Prediction Unit)块运动矢量,根据4个运动矢量的关系确定当前CU块的运动特性;最后通过运动特性确定要遍历的帧间预测模式,从而实现快速编码算法。实验结果表明,与HM16.15相比,本文提出的算法在低时延和随机接入配置下分别降低了31.6%和27.4%的编码时间,而编码器的编码性能基本不受影响。High Efficiency Video Coding(HEVC) consumes most of the coding time in inter-prediction. In order to shorten the encoding time,a fast inter-prediction mode selection algorithm is proposed based on CU’s motion characteristics. Firstly, the inter-prediction mode is classified by using the motion characteristics defined in this study. Secondly, the CU performs inter-prediction of size N×N, and determines the current CU motion characteristics according to the relationship of the sub-PU(Prediction Unit) motion vectors. At last, the traversal range of inter-prediction mode is determined by the current CU motion characteristics. The experimental results demonstrate that compared with HM16.15, the proposed algorithm reduces by 31.6% the coding time in low delay configuration and by 27.4% in random access configuration, while the coding performance of the encoder is substantially unaffected.

关 键 词：视频编解码 高效视频编码 帧间预测 运动特性 快速算法 

分 类 号：TN919.81[电子电信—通信与信息系统]