Paper Abstract and Keywords |
Presentation |
2014-07-17 14:25
Extended LZW codes with Modified Reduplicative Parsing Yuta Takabayashi, Hirosuke Yamamoto (Univ. of Tokyo) IT2014-19 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
The LZW code is categorized as the so-called dictionary method in the universal data compression codes and is used in GIF, TIFF, Unix Compress, etc. However, since the dictionary growing speed is not fast, the compression rate is not so good. On the other hand, a compression scheme is proposed based on the reduplicative parsing method to improve the dictionary growing speed. In this scheme we can realize the fast growing of the dictionary by storing the reduplicated sequence of a parsed one into the dictionary. But, the reduplicated sequence is not a sequence actually appeared in the past. In order to improve the above week points, we propose a new parsing method called ``concatenated parsing" and modified LZW codes based on the concatenated parsing. Furthermore, we evaluate the performance the modified LZW codes for Canterbury and Calgary corpuses. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
LZW code / universal data compression code / reduplicative parsing / concatenated parsing / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 114, no. 138, IT2014-19, pp. 43-48, July 2014. |
Paper # |
IT2014-19 |
Date of Issue |
2014-07-10 (IT) |
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) |
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IT2014-19 |
Conference Information |
Committee |
IT |
Conference Date |
2014-07-17 - 2014-07-18 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Kobe University |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
freshman session, general |
Paper Information |
Registration To |
IT |
Conference Code |
2014-07-IT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Extended LZW codes with Modified Reduplicative Parsing |
Sub Title (in English) |
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LZW code |
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universal data compression code |
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reduplicative parsing |
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concatenated parsing |
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1st Author's Name |
Yuta Takabayashi |
1st Author's Affiliation |
The University of Tokyo (Univ. of Tokyo) |
2nd Author's Name |
Hirosuke Yamamoto |
2nd Author's Affiliation |
The University of Tokyo (Univ. of Tokyo) |
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Speaker |
Author-1 |
Date Time |
2014-07-17 14:25:00 |
Presentation Time |
25 minutes |
Registration for |
IT |
Paper # |
IT2014-19 |
Volume (vol) |
vol.114 |
Number (no) |
no.138 |
Page |
pp.43-48 |
#Pages |
6 |
Date of Issue |
2014-07-10 (IT) |
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