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Title An Efficient Bayes Coding Algorithm using a New Unlimited Depth Context Tree (in Japanese)
Authors Toshiyasu Matsushima 、Shigeichi Hirasawa
Released Year 2008
Format Conference
Category Source coding
Jounal Name Proceedings of the 31th Symposium on Information Theory and its Applications
Jounal Page vol.31, no.2, pp.809-814
Published Year 2008
Published Month 10
Abstract
(English)
There are predictive and non-predictive algorithms
in the Bayes codes. The CTW(Context TreeWeighting)
algorithm has been interpreted as the non-predictive
Bayes coding algorithm assuming a special prior distribution
over context tree models. The two kinds of predictive
Bayes coding algorithms using a fixed and an unlimited
depth context tree were also proposed. The space complexity
of the predictive Bayes coding algorithm using an unlimited
depth context tree is O(t2) where t is the length of a
source sequence. In this paper, we propose an efficient predictive
Bayes coding algorithm using a new unlimited depth
context tree whose space complexity is O(t). Moreover, the
asymptotic code length of the Bayes coding algorithm using
the unlimited depth context tree is investigated
Note
(English)
1
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