基于迭代译码算法的分级分布式视频编码  

An iterative decoding based scalable distributed video coding

作　　者：卿粼波[1] 吕瑞[1] 欧先锋[1] 郑敏[1] 何小海[1] 

机构地区：[1]四川大学电子信息学院图像信息研究所,四川成都610064

出　　处：《山东大学学报（工学版）》2011年第2期58-61,共4页Journal of Shandong University（Engineering Science）

基　　金：四川大学青年科学基金资助项目(校青2008005);欧盟FP7-PEOPLE-IRSES资助项目(247083)

摘　　要：分布式视频编码(distributed video coding,DVC)是一种新的视频编码算法,与传统视频编码系统相比,具有低编码复杂度和高鲁棒性的优点。但它的压缩率比较低,对画面组(group of picture,GOP)的长度依赖性比较大。将H.264解码算法引入像素域视频编码系统(pixel domain Wyner-Ziv codec,PDWZ)中,提出了一种混合视频编码框架。系统采用了并行编码和迭代解码结构,同时引入了预测编码和一种新的边信息生成算法。仿真结果表明,提出的结构比最优的PDWZ有更高的压缩效率。同时它使视频能顺序编解码,并提供了多层的可分级性。As a new video coding paradigm,distributed video coding（DVC） has lower encoding complexity and higher robustness to transmission error than conventional video coding.However,its compression ratio was comparatively low and highly dependent on group-of-pictures（GOP） size.A combined video coding scheme was proposed by introducing H.264 coding into typical pixel domain Wyner-Ziv（PDWZ） coding.The coder has a parallel encoding and iterative decoding structure,in which a predictive coding scheme and a novel side-information（SI） generation algorithm are also adopted.Simulation showed that the proposed architecture has higher compression ratio than an optimized PDWZ coder.Moreover,it enables a video to be processed in sequential order and provides multilayer in scalability.

关 键 词：画面组(GOP) 迭代译码 预测编码 可分级视频编码 WZ视频编码技术 

分 类 号：TP919.81[自动化与计算机技术]