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Paper Abstract and Keywords
Presentation 2018-07-19 16:20
Easy Construction of Binary AIFV Codes for Unequal Letter Costs
Takahiro Yoshida (The Univ. Tokyo), Hirosuke Yamamoto (Meiji Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In the case that the costs of letters (code symbols) 0 and 1 are equal, it is known that the AIFV code with two code trees $T_0$ and $T_1$ can attain better compression rate than the Huffman code with a single code tree $T_{rm H}$. Furthermore, if we use the so-called easy construction of an AIFV code, the code trees $T_0$ and $T_1$ can be easily constructed from Huffman code tree $T_{rm H}$. Although the obtained AIFV code is not optimal generally, it can usually attain better compression rate than the Huffman code. In this paper, we treat AIFV coding and propose easy construction algorithms of AIFV codes for unequal letter costs. In ordinary AIFV code trees, a master node is connected to its grandchild by code symbols `00'. But, we consider the cases that a master node is connected to its grandchild by `01', `10', `11' in addition to `00', and we clarify the merits and demerits for their cases.
Keyword (in Japanese) (See Japanese page) 
(in English) letter costs / AIFV code / source coding / data compression / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 139, IT2018-18, pp. 31-36, July 2018.
Paper # IT2018-18 
Date of Issue 2018-07-12 (IT) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee IT  
Conference Date 2018-07-19 - 2018-07-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Yamato Kaigishitsu 
Topics (in Japanese) (See Japanese page) 
Topics (in English) freshman session, general 
Paper Information
Registration To IT 
Conference Code 2018-07-IT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Easy Construction of Binary AIFV Codes for Unequal Letter Costs 
Sub Title (in English)  
Keyword(1) letter costs  
Keyword(2) AIFV code  
Keyword(3) source coding  
Keyword(4) data compression  
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1st Author's Name Takahiro Yoshida  
1st Author's Affiliation The University of Tokyo (The Univ. Tokyo)
2nd Author's Name Hirosuke Yamamoto  
2nd Author's Affiliation Meiji University (Meiji Univ.)
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Speaker
Date Time 2018-07-19 16:20:00 
Presentation Time 25 
Registration for IT 
Paper # IEICE-IT2018-18 
Volume (vol) IEICE-118 
Number (no) no.139 
Page pp.31-36 
#Pages IEICE-6 
Date of Issue IEICE-IT-2018-07-12 


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