Systematic lossy forward error protection for video waveforms
Systematic lossy forward error protection for video waveforms
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DOI：
10.1109/icip.2003.1247035
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发表时间：
2003-11
期刊：
影响因子：
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通讯作者：
Anne Aaron;S. Rane;David Rebollo-Monedero;B. Girod
中科院分区：
文献类型：
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作者：
Anne Aaron;S. Rane;David Rebollo-Monedero;B. Girod
提出了一种新的基于Wyner-Ziv编码的容错数字视频广播方案。我们应用系统有损信源信道编码的一般框架来生成补充比特流，该补充比特流可以纠正解码视频波形中直到一定残余失真的传输错误。系统部分由传统的经MPEG编码的比特流组成，该比特流在容易出错的信道上传输，而不进行任何前向纠错。补充比特流是使用Wyner-Ziv编码生成的传输视频序列的低速率表示。我们使用常规解码的错误隐藏的mpeg视频序列作为边信息来解码Wyner-Ziv比特。解码器将容易出错的边信息和Wyner-Ziv描述相结合，以产生改进的解码视频信号。我们展示了如何使用该方案来构建一个系统，该系统在不需要视频波形的分层表示的情况下实现优雅的退化。
A novel scheme for error-resilient digital video broadcasting, using Wyner-Ziv coding, is presented in this paper. We apply the general framework of systematic lossy source-channel coding to generate a supplementary bitstream that can correct transmission errors in the decoded video waveform up to a certain residual distortion. The systematic portion consists of a conventional MPEG-coded bitstream, which is transmitted over the error-prone channel without any forward error correction. The supplementary bitstream is a low rate representation of the transmitted video sequence generated using Wyner-Ziv encoding. We use the conventionally decoded error-concealed MPEG video sequence as side information to decode the Wyner-Ziv bits. The decoder combines the error-prone side information and the Wyner-Ziv description to yield an improved decoded video signal. We show how this scheme can be used to build a system which achieves graceful degradation without the need of a layered representation of the video waveform.