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arXiv 1111.2217cs.ITmath.IT
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离散和高斯信源有损信源编码的中偏差

Moderate-Deviations of Lossy Source Coding for Discrete and Gaussian Sources

Vincent Y. F. Tan

摘要:

研究了平稳无记忆信源有损信源编码的中偏差设置。更具体地说,我们得出的基本压缩极限的源代码的速率是$R(D) \pm ε_n$,其中$R(D)$是率失真函数和$ε_n$是一个序列,占主导地位的$\sqrt{1/n}$。该MD设置是对大偏差和中心极限设置的补充,Altug和Wagner针对信道编码设置进行了研究。我们表明,有限字母表和高斯源,在中央限制型的结果,所谓的分散体的有损信源编码中起着根本性的作用,在MD设置的有损信源编码问题。

英文摘要:

We study the moderate-deviations (MD) setting for lossy source coding of stationary memoryless sources. More specifically, we derive fundamental compression limits of source codes whose rates are $R(D) \pm ε_n$, where $R(D)$ is the rate-distortion function and $ε_n$ is a sequence that dominates $\sqrt{1/n}$. This MD setting is complementary to the large-deviations and central limit settings and was studied by Altug and Wagner for the channel coding setting. We show, for finite alphabet and Gaussian sources, that as in the central limit-type results, the so-called dispersion for lossy source coding plays a fundamental role in the MD setting for the lossy source coding problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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