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| Presentation | 2012-03-16 16:00 Probabilistic optimized method of dereverberation, acoustic echo canceller, and noise reduction based on time-varying model of systems and sources Masahito Togami, Yohei Kawaguchi (CRL, Hitachi)  EA2011-128 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper deals with a simultaneous reduction technique of an acoustic echo, reverberation, and background noise at systems in which acoustic transfer functions are time-varying. For high noise-reduction performance with little speech distortion in time-varying systems, an effective utilization of both of a linear-filter and a non-linear filter is desirable. However, a simple cascade-connection of linear/non-linear filters is not good, because this causes an interference of each filter and degradation of undesired-sound reduction performance. In this paper, we propose a simultaneous optimization method of all filters by maximizing an unified likelihood function with a probabilistic model of time-variance of systems, each source. In the proposed method, the linear filters are adapted with appropriate time-weights with reference to covariance matrices of each source and systems. Experimental results with data which is recorded under a real meeting room show that the propose method is superior to cascade methods. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Dereverberation / echo canceller / probablistic optimization / time-varying system / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 490, EA2011-128, pp. 49-54, March 2012. | |
| Paper # | EA2011-128 | |
| Date of Issue | 2012-03-09 (EA) | |
| 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) | |
| Download PDF | EA2011-128 |
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| Conference Information | |
| Committee | EA |
| Conference Date | 2012-03-16 - 2012-03-16 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Central Research Laboratory, Hitachi, Ltd. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General Topics |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2012-03-EA |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Probabilistic optimized method of dereverberation, acoustic echo canceller, and noise reduction based on time-varying model of systems and sources |
| Sub Title (in English) | |
| Keyword(1) | Dereverberation |
| Keyword(2) | echo canceller |
| Keyword(3) | probablistic optimization |
| Keyword(4) | time-varying system |
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| Keyword(8) | |
| 1st Author's Name | Masahito Togami |
| 1st Author's Affiliation | Central Research Laboratory, Hitachi Ltd. (CRL, Hitachi) |
| 2nd Author's Name | Yohei Kawaguchi |
| 2nd Author's Affiliation | Central Research Laboratory, Hitachi Ltd. (CRL, Hitachi) |
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| Speaker | Author-1 |
| Date Time | 2012-03-16 16:00:00 |
| Presentation Time | 30 minutes |
| Registration for | EA |
| Paper # | EA2011-128 |
| Volume (vol) | vol.111 |
| Number (no) | no.490 |
| Page | pp.49-54 |
| #Pages | 6 |
| Date of Issue | 2012-03-09 (EA) |
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