提高MPEG-2信噪比可分级视频编码效率的研究  

Research on Efficiency Improvement of Using SNR Scalability MPEG-2 Video Coding

作　　者：李晶[1] 尹昊晖[2] 张家谋[2] 

机构地区：[1]中国科学技术大学研究生院,北京100039 [2]北京邮电大学电信工程学院,北京100876

出　　处：《高技术通讯》2001年第8期55-59,共5页Chinese High Technology Letters

基　　金：国家自然科学基金资助项目 (69672 0 3 7)

摘　　要：采用信噪比可分级性的双层视频编码可以用于提供在信道资源不可靠情况下视频信号的恢复 ,然而 ,信噪比可分级编码的这一优点是以增加总比特率为代价的。针对这一问题 ,提出了一个新的基于率失真理论的优化方法 ,称为最优系数调整法。Two layer video coding using SNR scalability can be used to offer error resilience to video applications where channel resources are unreliable. However, SNR scalability guarantees good base quality pictures at the expense of increased overall bit rate. In accordance with this, a novel optimum method based on rate distortion theory called optimal coefficient adjustment is presented. The Experimental results show that the optimum method may improve the coding efficiency and superiority to traditional thresholding algorithms.

关 键 词：视频编码 MPEG-2 信噪比可分级性 率失真理论 视频通信 最优系数调整法 

分 类 号：TN919.81[电子电信—通信与信息系统]