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arXiv 0901.1904cs.ITcs.LGmath.IT
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通用字母表平稳混合源的联合通用有损编码与识别

Joint universal lossy coding and identification of stationary mixing sources with general alphabets

Beckman Institute for Advanced Science and Technology, University of Illinois(伊利诺伊大学贝克曼先进科学技术研究所);Duke University(杜克大学)

Maxim Raginsky

摘要:

我们考虑的问题,联合通用可变速率有损编码和识别的参数类的固定$β$混合源一般(波兰)字母。压缩性能是衡量的拉格朗日,而识别性能是衡量的变化之间的距离真实源和估计源。假设源以足够快的速率混合并满足一定的平滑性和Vapnik-Chervonenkis可学习性条件,则对于有界度量失真,存在用于联合有损压缩和识别的通用方案,其拉格朗日冗余收敛到零,如块长度$n$趋于无穷大时的$\sqrt{V_n \log n /n}$,其中$V_n$是由源的$n$维边缘分布定义的某类决策区域的Vapnik-Chervonenkis维数;此外,对于每个$n$,解码器可以识别活动源的$n$维边缘,直到在变距离中的半径为$O(\sqrt{V_n\log n/n})$的球,最终概率为1。结果补充了几个例子的参数源满足正则性条件。

英文摘要:

We consider the problem of joint universal variable-rate lossy coding and identification for parametric classes of stationary $β$-mixing sources with general (Polish) alphabets. Compression performance is measured in terms of Lagrangians, while identification performance is measured by the variational distance between the true source and the estimated source. Provided that the sources are mixing at a sufficiently fast rate and satisfy certain smoothness and Vapnik-Chervonenkis learnability conditions, it is shown that, for bounded metric distortions, there exist universal schemes for joint lossy compression and identification whose Lagrangian redundancies converge to zero as $\sqrt{V_n \log n /n}$ as the block length $n$ tends to infinity, where $V_n$ is the Vapnik-Chervonenkis dimension of a certain class of decision regions defined by the $n$-dimensional marginal distributions of the sources; furthermore, for each $n$, the decoder can identify $n$-dimensional marginal of the active source up to a ball of radius $O(\sqrt{V_n\log n/n})$ in variational distance, eventually with probability one. The results are supplemented by several examples of parametric sources satisfying the regularity conditions.

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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