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IEICE TRANSACTIONS on Fundamentals

A Note on the ε-Overflow Probability of Lossless Codes

Ryo NOMURA, Toshiyasu MATSUSHIMA, Shigeichi HIRASAWA

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Summary :

In this letter, we generalize the achievability of variable-length coding from two viewpoints. One is the definition of an overflow probability, and the other is the definition of an achievability. We define the overflow probability as the probability of codeword length, not per symbol, is larger than ηn and we introduce the ε-achievability of variable-length codes that implies an existence of a code for the source under the condition that the overflow probability is smaller than or equal to ε. Then we show that the ε-achievability of variable-length codes is essentially equivalent to the ε-achievability of fixed-length codes for general sources. Moreover by using above results, we show the condition of ε-achievability for some restricted sources given ε.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E90-A No.12 pp.2965-2970
Publication Date
2007/12/01
Publicized
Online ISSN
1745-1337
DOI
10.1093/ietfec/e90-a.12.2965
Type of Manuscript
LETTER
Category
Information Theory

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