Paper Abstract and Keywords |
Presentation |
2007-06-29 13:00
Improvement of unsupervised adaptation in lecture speech recognition Takashi Kusama, Yohei Okuyama, Masaharu Katoh, Tetsuo Kosaka, Masaki Kohda (Yamagata Univ.) SP2007-20 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In recent years, many aggressive approaches for large vocabulary continuous speech recognition (LVCSR) system trained on large-scale spontaneous speech database have been investigated. In this paper, we present and compare several methods of unsupervised adaptation for LVCSR and evaluate the methods using diagonal-covariance and full-covariance models on the Corpus of Spontaneous Japanese. The results of recognition experiments with full-covariance model showed the decrease in word error rate from 19.17% without adaptation to 14.73% with unsupervised adaptation, moreover to 14.55% with unsupervised adaptation by weighting the adaptation data on the basis of a part of speech. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
LVCSR / lecture speech recognition / unsupervised adaptation / full-covariance model / Corpus of Spontaneous Japanese / / / |
Reference Info. |
IEICE Tech. Rep., vol. 107, no. 116, SP2007-20, pp. 73-78, June 2007. |
Paper # |
SP2007-20 |
Date of Issue |
2007-06-21 (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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SP2007-20 |
Conference Information |
Committee |
SP |
Conference Date |
2007-06-28 - 2007-06-29 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
The University of Aizu |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Speech Recognition, Speech Understanding, Speech Dialogue, etc. |
Paper Information |
Registration To |
SP |
Conference Code |
2007-06-SP |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Improvement of unsupervised adaptation in lecture speech recognition |
Sub Title (in English) |
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Keyword(1) |
LVCSR |
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lecture speech recognition |
Keyword(3) |
unsupervised adaptation |
Keyword(4) |
full-covariance model |
Keyword(5) |
Corpus of Spontaneous Japanese |
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1st Author's Name |
Takashi Kusama |
1st Author's Affiliation |
Yamagata University (Yamagata Univ.) |
2nd Author's Name |
Yohei Okuyama |
2nd Author's Affiliation |
Yamagata University (Yamagata Univ.) |
3rd Author's Name |
Masaharu Katoh |
3rd Author's Affiliation |
Yamagata University (Yamagata Univ.) |
4th Author's Name |
Tetsuo Kosaka |
4th Author's Affiliation |
Yamagata University (Yamagata Univ.) |
5th Author's Name |
Masaki Kohda |
5th Author's Affiliation |
Yamagata University (Yamagata Univ.) |
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Speaker |
Author-1 |
Date Time |
2007-06-29 13:00:00 |
Presentation Time |
30 minutes |
Registration for |
SP |
Paper # |
SP2007-20 |
Volume (vol) |
vol.107 |
Number (no) |
no.116 |
Page |
pp.73-78 |
#Pages |
6 |
Date of Issue |
2007-06-21 (SP) |
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