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Paper Abstract and Keywords
Presentation 2016-05-20 10:40
A Grammar-Based Data Compression Algorithm Using Chomsky Normal Form of Context Free Grammar
Mitsuharu Arimura (Shonan Inst. Tech.) IT2016-12 EMM2016-12
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a new class of grammar-based lossless source code. For the simplicity, a Semi-Chomsky Normal Form (semi-CNF) of context free grammar is introduced. A semi-CNF is a modified form of the CNF proposed in this paper. Grammar-based code is a class of universal data compression algorithm using a context-free grammar. The proposed algorithm translates a given sequence to the irreducible grammar generating only a given sequence in two step. In the first step, a semi-CNF of the set of production rules is constructed using repeated substitution from a pair of symbols or variables to a new variable. In the second step, semi-CNF is translated to an irreducible or smaller grammar by eliminating production rules which are used only once in the other production rules. LZ78, Multilevel Pattern Matching (MPM) and Byte Pair Encoding (BPE) algorithms can be treated as examples of this class of codes. These algorithms use only the first step of this two-step procedure. Therefore, the proposed method can improve the compression performance of these algorithms by the unified procedure. This method has an advantage that, transformation from a given sequence to the grammar is quite simple and efficient, by using the two step algorithm through semi-CNF.
Keyword (in Japanese) (See Japanese page) 
(in English) Lossless Data Compression / Context Free Grammar / Chomsky Normal Form / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 33, IT2016-12, pp. 69-74, May 2016.
Paper # IT2016-12 
Date of Issue 2016-05-12 (IT, EMM) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IT2016-12 EMM2016-12

Conference Information
Committee IT EMM  
Conference Date 2016-05-19 - 2016-05-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Otaru Economic Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Information Security, Information Theory, Information Hiding, etc. 
Paper Information
Registration To IT 
Conference Code 2016-05-IT-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Grammar-Based Data Compression Algorithm Using Chomsky Normal Form of Context Free Grammar 
Sub Title (in English)  
Keyword(1) Lossless Data Compression  
Keyword(2) Context Free Grammar  
Keyword(3) Chomsky Normal Form  
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1st Author's Name Mitsuharu Arimura  
1st Author's Affiliation Shonan Institute of Technology (Shonan Inst. Tech.)
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Speaker Author-1 
Date Time 2016-05-20 10:40:00 
Presentation Time 25 minutes 
Registration for IT 
Paper # IT2016-12, EMM2016-12 
Volume (vol) vol.116 
Number (no) no.33(IT), no.34(EMM) 
Page pp.69-74 
#Pages 6 
Date of Issue 2016-05-12 (IT, EMM) 

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