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Paper Abstract and Keywords
Presentation 2021-03-04 11:20
A note on sufficient condition for reconstructable substring of CSE method
Shungo Tanaka, Hiroshi Kamabe, Shan Lu (Gifu Univ.) IT2020-116 ISEC2020-46 WBS2020-35
Abstract (in Japanese) (See Japanese page) 
(in English) Various data compression methods have been proposed, which can be roughly classified into two cat-egories: lossless compression methods that can completely recover the original data from compressed data andirreversible compression methods that cannot completely recover the original data. In this study, we focus on acompression method called Compression via Substring Enumeration (CSE) , which is a kind of lossless compressionmethod proposed by Dubé et al. In the CSE method, encoding is performed by counting the number of occurrencesof substrings in the string to be compressed. In one improvement of CSE by Shima et al. , it was shown thatby improving the conditional expression of the substring counting, the compression ratio is better than that of theCSE method proposed by Dubé et al. for some random information sources. In this study, the number of substringsto be encoded is reduced by creating a graph structure called CST when counting the number of occurrences ofsubstrings, conducting a full search from the root of the CST each time a node is created, and terminating the en-coding when a string of length n is found. The number of substrings to be encoded is reduced, and the compressionratio is improved by Huffman coding. Besides, we evaluate the coding rate by comparing the proposed method withexisting methods.
Keyword (in Japanese) (See Japanese page) 
(in English) Compression via Substring Enumeration / Substring enumeration / compression ratio / / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 410, IT2020-116, pp. 25-30, March 2021.
Paper # IT2020-116 
Date of Issue 2021-02-25 (IT, ISEC, WBS) 
ISSN 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 IT2020-116 ISEC2020-46 WBS2020-35

Conference Information
Committee WBS IT ISEC  
Conference Date 2021-03-04 - 2021-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Joint Meeting of WBS, IT, and ISEC 
Paper Information
Registration To IT 
Conference Code 2021-03-WBS-IT-ISEC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A note on sufficient condition for reconstructable substring of CSE method 
Sub Title (in English)  
Keyword(1) Compression via Substring Enumeration  
Keyword(2) Substring enumeration  
Keyword(3) compression ratio  
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1st Author's Name Shungo Tanaka  
1st Author's Affiliation Gifu University (Gifu Univ.)
2nd Author's Name Hiroshi Kamabe  
2nd Author's Affiliation Gifu University (Gifu Univ.)
3rd Author's Name Shan Lu  
3rd Author's Affiliation Gifu University (Gifu Univ.)
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Speaker Author-1 
Date Time 2021-03-04 11:20:00 
Presentation Time 25 minutes 
Registration for IT 
Paper # IT2020-116, ISEC2020-46, WBS2020-35 
Volume (vol) vol.120 
Number (no) no.410(IT), no.411(ISEC), no.412(WBS) 
Page pp.25-30 
#Pages 6 
Date of Issue 2021-02-25 (IT, ISEC, WBS) 

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