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On joint information embedding and lossy compression

机译:关于联合信息嵌入和有损压缩

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We consider the problem of optimum joint information embedding and lossy compression with respect to a fidelity criterion. The goal is to find the minimum achievable compression (composite) rate R/sub c/ as a function of the embedding rate R/sub e/ and the average distortion level /spl Delta/ allowed, such that the average probability of error in decoding of the embedded message can be made arbitrarily small for sufficiently large block length. We characterize the minimum achievable composite rate for both the public and the private versions of the problem and demonstrate how this minimum can be approached in principle. We also provide an alternative single-letter expression of the maximum achievable embedding rate (embedding capacity) as a function of R/sub c/ and /spl Delta/, above which there exist no reliable embedding schemes.
机译:我们考虑了关于保真度准则的最佳联合信息嵌入和有损压缩的问题。目的是根据嵌入率R / sub e /和允许的平均失真水平/ spl Delta /找到最小可达到的压缩(复合)率R / sub c /,从而使解码时的平均错误概率对于足够大的块长度,嵌入消息的大小可以任意减小。我们描述了该问题的公共版本和私有版本可实现的最低复合率,并说明了如何从原则上实现该最低率。我们还提供了最大可实现的嵌入率(嵌入容量)作为R / sub c /和/ spl Delta /的函数的替代单字母表达,在此之上,没有可靠的嵌入方案。

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