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arXiv 0712.0097cs.ITmath.IT
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Bernoulli信源序列基于字编码的冗余度估计

Redundancy Estimates for Word-Based Encoding of Sequences Produced by a Bernoulli Source

G. L. Khodak

摘要:

码的效率由其冗余$R$来估计,而码的复杂度由其平均延迟$\bar N$来估计。在这项工作中,我们构建了基于单词的代码,其中$R \lesssim \bar N^{-5/3}$。因此,基于字的代码可以获得与块代码相同的冗余度,同时复杂度要低得多。我们还考虑了输出代码的统一,其好处是没有运行同步错误。对于这样的码$\bar N^{-1} \lesssim R \lesssim \bar N^{-1}$,除了当所有输入符号都是等概率的情况之外,当$R \leqslant \bar N^{-2}$对于无限多个$\bar N$。

英文摘要:

The efficiency of a code is estimated by its redundancy $R$, while the complexity of a code is estimated by its average delay $\bar N$. In this work we construct word-based codes, for which $R \lesssim \bar N^{-5/3}$. Therefore, word-based codes can attain the same redundancy as block-codes while being much less complex. We also consider uniform on the output codes, the benefit of which is the lack of a running synchronization error. For such codes $\bar N^{-1} \lesssim R \lesssim \bar N^{-1}$, except for a case when all input symbols are equiprobable, when $R \leqslant \bar N^{-2}$ for infinitely many $\bar N$.

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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