MPEG-2多节目的系统复用分析  

The Analysis of MPEG-2 Multi-program System Multiplexing

作　　者：王玉霞[1] 姜秀华[1] 

机构地区：[1]北京广播学院电子信息工程系,北京100024

出　　处：《中国传媒大学学报（自然科学版）》2003年第2期58-65,共8页Journal of Communication University of China：Science and Technology

摘　　要：本文主要研究了MPEG - 2多节目系统复用的问题。对多路节目的复用 ,在图像通信领域 ,可采用两种编码方式 :独立编码和联合编码。在独立编码中介绍了帧平移算法和基于宏块条的互相关算法 ;对于联合编码 ,本文介绍了一种利用超帧概念的基于率失真理论的联合码率控制策略 ,同时阐述TM 5码率控制原理。最后得出结论 ,独立编码中重建图像存在显著差异 ,联合码率控制可以改善此缺陷 ,可节省频带资源 ,但仍需要进一步研究。In this paper, MPEG-2 multi-program system multiplexing is studied. In multi-program transmission environment,there are two ways of transcoding: independent or joint transcoding. For independent transcoding of MPEG-2 VBR video,frame shift and algorithm based on correlation of slice are proposed;For joint transcoding, we introduce the joint rate control strategy based on the rate distortion, which uses the concept of superframe. At the same time, the principle of TM5 rate control is explained. And the last part concludes this paper.

关 键 词：MPEG-2 TM5 统计复用 宏块条 固定比特率 可变比特率 率失真 

分 类 号：TN949.194[电子电信—信号与信息处理]