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细粒度并行归一化部分失真运动估计
作者姓名:袁竞杰  张清毅  马宜科  宋风龙
作者单位:1. 中国矿业大学(北京)机电与信息工程学院, 北京 100083; 2. 中国科学院计算技术研究所计算机体系结构国家重点实验室, 北京 100190
基金项目:国家自然科学基金(61100013)和中央高校基本科研业务费专项(2010YJ19)资助
摘    要:移动视频编码应用对实时性要求越来越高,传统编码器中使用的串行运动估计算法难以满足实时编码要求.本文并行化移动编码中典型的运动估计算法--归一化部分失真搜索.采用比帧和宏块更小的候选块作为并行粒度,保持归一化部分失真快速排除非最佳候选块优势,同时充分利用多核计算资源.4核CPU平台上实验结果表明,相比串行算法,该并行算法在计算量增加不超过1.2%的前提下,实现了3.88至3.96的加速比.

关 键 词:视频编码  运动估计  部分失真搜索  并行计算  
收稿时间:2012-12-19
修稿时间:2013-03-29

Fine-grained parallel algorithm for normalized partial distortion search
Authors:YUAN Jing-Jie  ZHANG Qing-Yi  MA Yi-Ke  SONG Feng-Long
Institution:1. College of Mechanical and Electrical Engineering, China University of Mining & Technology, Beijing 100083, China; 2. State Key Laboratory of Computer Architecture, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China
Abstract:Serial motion estimation does not satisfy real-time requirements of video coding in mobile terminal. A divided-spiral-path parallel motion estimation based on normalized partial distortion search is proposed to make full use of multi-core computing power, and it retains low computational complexity of the serial algorithm. Experimental results show that the proposed algorithm achieves speedup ratios of 3.88-3.96 on a 4-core CPU platform while the cost of trivial computational effort increases by less than 1.2%.
Keywords:video coding                                                                                                                        motion estimation                                                                                                                        partial distortion search                                                                                                                        parallel computing
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