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Paper Abstract and Keywords
Presentation 2009-01-29 15:10
WFST-based Dialog Management Using Statistical Dialog Model
Chiori Hori, Kiyonori Ohtake, Teruhisa Misu, Hideki Kashioka, Satoshi Nakamura (NICT-ATR) SP2008-130
Abstract (in Japanese) (See Japanese page) 
(in English) Abstract We have proposed an expandable and portable dialog scenario description and platform to manage dialog sys-tems using a Weighted Finite-State Transducer (WFST) in which user concept and system action tags are input and output of the transducer, respectively. This paper presents statistical dialog management acquired from an annotated corpus of hu-man-to-human conversation for hotel reservation is applied to WFST-based dialog systems. Interchange Format (IF) consisting of dialog acts and argument which is an interlingua for machine translation was used as user concept and system action tags. A scenario WFST for dialog management was automatically created by converting N-gram models of a tag sequence in the cor-pus. Additionally, a word-to-concept WFST for spoken language understanding (SLU) was obtained form the same corpus. The acquired scenario WFST and SLU WFST were composed together and then optimized. The composed WFST enables us to understand spoken language according to the state of the dialog. We have confirmed the automatically acquired dialog scenario can manage dialog reasonably. We evaluated statistic dialog management in terms of correctness to detect next system actions with and without detecting next user actions. The performance of detecting next systems actions were enhanced by the predic-tion of next user actions and the optimization of the scenario WFST and SLU WFST.
Keyword (in Japanese) (See Japanese page) 
(in English) Weighted Finite State Transducer (WFST) / Spoken Dialog / Statistical Dialog Management / Tag N-gram / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 422, SP2008-130, pp. 25-30, Jan. 2009.
Paper # SP2008-130 
Date of Issue 2009-01-22 (SP) 
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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Conference Information
Committee SP  
Conference Date 2009-01-29 - 2009-01-30 
Place (in Japanese) (See Japanese page) 
Place (in English) NAIST 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SP 
Conference Code 2009-01-SP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) WFST-based Dialog Management Using Statistical Dialog Model 
Sub Title (in English)  
Keyword(1) Weighted Finite State Transducer (WFST)  
Keyword(2) Spoken Dialog  
Keyword(3) Statistical Dialog Management  
Keyword(4) Tag N-gram  
Keyword(5)  
Keyword(6)  
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Keyword(8)  
1st Author's Name Chiori Hori  
1st Author's Affiliation National Institute of Information and Communications Technology - Advanced Telecommunications Research Institute International (NICT-ATR)
2nd Author's Name Kiyonori Ohtake  
2nd Author's Affiliation National Institute of Information and Communications Technology - Advanced Telecommunications Research Institute International (NICT-ATR)
3rd Author's Name Teruhisa Misu  
3rd Author's Affiliation National Institute of Information and Communications Technology - Advanced Telecommunications Research Institute International (NICT-ATR)
4th Author's Name Hideki Kashioka  
4th Author's Affiliation National Institute of Information and Communications Technology - Advanced Telecommunications Research Institute International (NICT-ATR)
5th Author's Name Satoshi Nakamura  
5th Author's Affiliation National Institute of Information and Communications Technology - Advanced Telecommunications Research Institute International (NICT-ATR)
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Speaker Author-1 
Date Time 2009-01-29 15:10:00 
Presentation Time 25 minutes 
Registration for SP 
Paper # SP2008-130 
Volume (vol) vol.108 
Number (no) no.422 
Page pp.25-30 
#Pages 6 
Date of Issue 2009-01-22 (SP) 

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