The output distribution of good lossy source codes
The output distribution of good lossy source codes
复制标题
良好有损源代码的输出分布
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
S. Verdú
中科院分区：
文献类型：
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作者：
V. Kostina;S. Verdú
本文提供了必要的条件，必须满足良好的利率延伸代码。具体而言，结果表明，随着良好有损代码的输出的输出，输入的分布会收敛到输入的分布，从而在归一化的情况下给定实现了速率 - 利率函数的联合分布的输出条件相对熵。该结果适用于具有固定长度和可变长度压缩的固定偏执源。对于有损耗的关节源通道编码，给出了类似的必要条件。
This paper provides a necessary condition good rate-distortion codes must satisfy. Specifically, it is shown that as the blocklength increases, the distribution of the input given the output of a good lossy code converges to the distribution of the input given the output of the joint distribution achieving the rate-distortion function, in terms of the normalized conditional relative entropy. The result holds for stationary ergodic sources with subadditive distortion measures, both for fixed-length and variable-length compression. A similar necessary condition is given for lossy joint source-channel coding.