无线低码率视频中的信源信道联合RD模型

doi:10.13190/jbupt.201005.75.peizhy

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (5): 75-79.doi: 10.13190/jbupt.201005.75.peizhy

无线低码率视频中的信源信道联合RD模型

裴智勇，蔡安妮

北京邮电大学信息与通信工程学院

收稿日期:2009-12-02 修回日期:2010-04-13 出版日期:2010-08-28 发布日期:2010-06-15
通讯作者: 裴智勇 E-mail:woodfish2004@gmail.com;woodfish2004@sohu.com
基金资助:
部级.博士点基金项目

Joint SourceChannel RD Model for Wireless LowBitRate Video Transmission

Received:2009-12-02 Revised:2010-04-13 Online:2010-08-28 Published:2010-06-15

摘要/Abstract

摘要：

为了实现无线低码率视频应用中端到端失真特性的动态分析，本文首先以图像组（GOP）为观察单元，分别对I帧和P帧进行了信源和信道的失真分析；然后分析了信道失真在GOP内的传播规律；最后在此基础上，提出了一个信源信道联合率失真（RD）模型. 该模型能根据视频序列的内容变化和信道丢包率，动态地估计出一个GOP中各帧的平均端到端失真. 实验结果表明，该模型具有很好的动态性能和精确性.

关键词: 图像组分析, 信源失真, 信道失真, 联合率失真, 量化参数

Abstract:

In order to dynamically analyze the endtoend distortion, a new joint sourcechannel ratedistortion (RD) model for wireless lowbitrate video transmission is proposed. The source and the channel distortions of I and P frames are respectively analyzed on a group of picture (GOP)，and the propagation of distortion within the GOP is discussed. It can dynamically estimate the average endtoend distortion of each frame in the GOP according to packet loss rate and characteristics of the video sequence. Experiments show that the accuracy of this model is satisfactory.

Key words: group of picture analysis, source distortion, channel distortion, joint ratedistortion model, quantization parameter

裴智勇蔡安妮. 无线低码率视频中的信源信道联合RD模型[J]. 北京邮电大学学报, 2010, 33(5): 75-79.

参考文献

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无线低码率视频中的信源信道联合RD模型

Joint SourceChannel RD Model for Wireless LowBitRate Video Transmission

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