Distributed video coding
Distributed video coding
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DOI：
10.1109/jproc.2004.839619
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发表时间：
2005-01-01
影响因子：
20.6
通讯作者：
Rebollo-Monedero, D
中科院分区：
文献类型：
--
作者：
Girod, B;Margot, A;Rebollo-Monedero, D
分布式编码是基于Slepian和Wolf以及Wyner和Ziv在20世纪70年代的信息理论结果的一种新的视频压缩模式。本文综述了实用的分布式视频编码方案的最新发展，Wyner-Ziv编码，即，利用接收器侧信息的有损压缩实现了低复杂度视频编码，其中大量计算被转移到解码器。由于视频序列的帧间依赖性仅在解码器处被利用，因此帧内编码器可以与帧间解码器组合。其率失真性能比传统的帧内编码有上级的提高，但与传统的运动补偿帧间编码相比仍有差距。Wyner-Ziv编码对传输错误具有自然的鲁棒性，并且可以用于联合信源信道编码。保护视频波形而不是压缩比特流的Wyner-Ziv MPEG编码器在没有分层信号表示的情况下在恶化的信道条件下实现适度降级。
Distributed coding is a new paradigm for video compression, based on Slepian and Wolf's and Wyner and Ziv's information-theoretic results from the 1970s. This paper reviews the recent development of practical distributed video coding schemes, Wyner-Ziv coding, i.e., lossy compression with receiver side information, enables low-complexity video encoding where the bulk of the computation is shifted to the decoder. Since the interframe dependence of the video sequence is exploited only at the decoder, an intraframe encoder can be combined with an interframe decoder. The rate-distortion performance is superior to conventional intraframe coding, but there is still a gap relative to conventional motion-compensated interframe coding. Wyner-Ziv coding is naturally robust against transmission errors and can be used for joint source-channel coding. A Wyner-Ziv MPEG encoder that protects the video waveform rather than the compressed bit stream achieves graceful degradation under deteriorating channel conditions without a layered signal representation.