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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, PP. 75-79

Keywords: 图像组分析,信源失真,信道失真,联合率失真,量化参数

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Abstract:

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.

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