Wyner-Ziv视频编码中边信息生成算法研究  

Research on side information generation algorithm for Wyner-Ziv video coding

作　　者：宋彬[1] 贺红[1] 刘海华[1] 秦浩[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室,陕西西安710071

出　　处：《通信学报》2010年第12期97-103,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60802032);"高等学校创新引智计划"基金资助项目(B08038);长江学者和创新团队发展计划基金资助项目(IRT0852)~~

摘　　要：在Wyner-Ziv视频编码系统中,针对生成边信息容易出现块效应和重影现象的问题,提出了一种基于原始图像相关性的重叠块双向运动补偿算法。在编码端计算原始图像相关性,并将相关性数据发送到解码端辅助运动估计,得到较精确的运动矢量,最后通过重叠块双向运动补偿生成边信息。实验结果表明,与现有的双向运动补偿内插算法相比,提出的算法生成边信息的平均PSNR可以提高1.5~3dB,且边信息的主观质量也有明显改善。To reduce the block artifacts and ghosting artifacts of side-information frame in Wyner-Ziv video coding,an overlapped block bi-directional motion compensation algorithm based on the original-image correlation was proposed.Firstly,the correlation of the original image in the encoder is calculated and sent to the decoder.Secondly,the correlation data is used to motion estimation in the decoder to get more accurate motion vector.Then the side information is gener-ated by bi-directional motion compensation.Compared with the existing algorithm,the proposed method can increase the average PSNR（peak signal-to-noise ratio） by 1.5~3dB,and also significantly improve the subjective quality of the side information.

关 键 词：分布式视频编码 WYNER-ZIV编码 边信息 运动估计 帧内插 

分 类 号：TN919.8[电子电信—通信与信息系统]