信噪比可调dpcm编码视频的差错鲁棒分组传输信道速率分配

Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI:10.1109/ISSPA.2003.1224846

Till Halbach, T. Fischer

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引用次数: 2

摘要

考虑了一种具有质量约束的可扩展信噪比的混合视频编码方案。编码的数字数据以包的形式在易出错的信道上传输。我们推导了一种低复杂度的算法，该算法基于有限的代码集，并考虑信道条件，代码属性，数据的重要性和包间依赖关系，为每个数据包分配最佳代码。因此，实现了高容错性传输，图像质量等于低错误概率(0.002)的近似高质量层信噪比。随着信道条件的退化，质量的下降只是适度的。

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Channel rate allocation for error-robust packet transmission of SNR-scalable DPCM-coded video

An SNR-scalable hybrid video coding scheme with a quality constraint is considered. The encoded digital data are conveyed as packets over an error-prone channel. We derive a low-complexity algorithm which assigns the best code to each packet, based on a limited set of codes, and accounting for channel conditions, code properties, the data's importance, and inter-packet dependencies. A highly error-resilient transmission is hereby achieved, the image quality being equal to approximately high-quality layer SNR for a low error probability (0.002). The quality decrease with degrading channel conditions is only moderate.

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Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.

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