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Paper Abstract and Keywords
Presentation 2011-02-18 14:45
Extraction of Mathematical Formulas for Supporting Real-time Captioning
Hironori Kawaguchi, Yoshinori Takeuchi, Tetsuya Matsumoto, Hiroaki Kudo, Noboru Ohnishi (Nagoya Univ.) WIT2010-70
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a method solving the problem of captioning when a instractor utters a mathematical formula with different interpretations, using Real-time Captioning system. In our study, we adopt a approach to extract a image corresponding uttered mathematical formula from lecture slides. This method uses a fact that a instractor usually points a mathematical formula on the slide when he/she utters it.
We use speech recognition decoder software "Julius" with acoustic model and language model generated Corpus of Spontaneous Japanese, we register mathematical formula components in the lecture into the dictionary in Julius. Then, we extract pointing gestures from the tracks of stick tip from the images of the lecture. We integrate the result of mathmatical formula component extraction with that of pointing gesture extraction, and extract mathematical formula images correspoding to utttered mathematical formula. We have conducted experiments by using recorded audio-visual signals from a real lecture. Experimental result shows that recall ratio is about 69{\%} and relevance ratio is about 91{\%}.
Keyword (in Japanese) (See Japanese page) 
(in English) Real-time Captioning / Mathematical Formulas Extraction / Pointing Gesture / / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 418, WIT2010-70, pp. 19-24, Feb. 2011.
Paper # WIT2010-70 
Date of Issue 2011-02-11 (WIT) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 WIT  
Conference Date 2011-02-18 - 2011-02-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WIT 
Conference Code 2011-02-WIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Extraction of Mathematical Formulas for Supporting Real-time Captioning 
Sub Title (in English)  
Keyword(1) Real-time Captioning  
Keyword(2) Mathematical Formulas Extraction  
Keyword(3) Pointing Gesture  
1st Author's Name Hironori Kawaguchi  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Yoshinori Takeuchi  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Tetsuya Matsumoto  
3rd Author's Affiliation Nagoya University (Nagoya Univ.)
4th Author's Name Hiroaki Kudo  
4th Author's Affiliation Nagoya University (Nagoya Univ.)
5th Author's Name Noboru Ohnishi  
5th Author's Affiliation Nagoya University (Nagoya Univ.)
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Date Time 2011-02-18 14:45:00 
Presentation Time 30 
Registration for WIT 
Paper # IEICE-WIT2010-70 
Volume (vol) IEICE-110 
Number (no) no.418 
Page pp.19-24 
#Pages IEICE-6 
Date of Issue IEICE-WIT-2011-02-11 

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