H.264视频编码系统中多参考帧的选择算法研究  

Study of multiple reference frame selection algorithm in H.264 video coding system

作　　者：沈敏一[1] 高新波[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电路与系统学报》2008年第4期50-54,49,共6页Journal of Circuits and Systems

基　　金：国家自然科学基金项目(No.60702061;No.60771068);教育部新世纪优秀人才支持计划资助(NCET-04-0948)

摘　　要：H.264/MPEG-4AVC中引入多参考帧运动补偿来提高视频编码性能,由此产生的多参考帧运动估计(MRF-ME)却带来了巨大的运算代价。本文提出一种基于快速分层特征匹配的运动估计策略(HFM-ME)来加速多参考帧的匹配过程。HFM-ME策略通过引入一种符号截断特征(STF)将块匹配被分解为均值匹配和二进制相位匹配。实验结果表明,与传统的块匹配ME相比,HFM-ME在保持匹配性能的同时显著提高了运算速度。H.264/MPEG-4 AVC introduces the multiple reference frame motion compensation to improve video coding performance. However, the resulted multiple reference frame motion estimation （MRF-ME） leads to much more computational cost. This paper presents a new method to speed up the matching process for multiple reference frames, called a fast hierarchical feature matching-motion estimation （HFM-ME） scheme. In the HFM-ME scheme, the sign truncated feature （STF） is defined and used for block matching. The block matching is then divided into mean matching and binary phase matching. Compared with the traditional block matching ME, the experimental results show that the proposed HFM-ME significantly reduces the CPU time while approximately keeps the similar performance.

关 键 词：多参考帧运动估计 快速分层特征匹配运动估计 符号截断特征 块匹配运动估计 

分 类 号：TN919.8[电子电信—通信与信息系统]