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无线低码率视频中的信源-信道联合RD模型 被引量：1

Joint Source-Channel RD Model for Wireless Low-Bit-Rate Video Transmission
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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. 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 G0P according to packet loss rate and characteristics of the video sequence. Experiments show that the accuracy of this model is satisfactory.
作者 裴智勇 蔡安妮
机构地区 北京邮电大学信息与通信工程学院
出处 《北京邮电大学学报》 EI CAS CSCD 北大核心 2010年第5期75-79,共5页 Journal of Beijing University of Posts and Telecommunications
基金 国家自然科学基金项目(60772114,90920001)
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 group of picture analysis source distortion channel distortion joint rate-distortion model quantization parameter
分类号 TN919.8 [电子电信—通信与信息系统]
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参考文献10

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同被引文献12

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北京邮电大学学报
2010年 第5期

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