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Paper Abstract and Keywords
Presentation 2010-03-26 15:15
Evaluation of a nonlinear-echo canceller applied to a hands-free communication system with sampling-frequency offsets
Yasuhiro Mochida (Univ. of Tokyo), Osamu Hoshuyama, Toshiyuki Nomura (NEC) EA2009-118
Abstract (in Japanese) (See Japanese page) 
(in English) This paper provieds a performance evaluation of a nonlinear-echo canceller (NLEC) applied to a hands-free communication system with sampling-frequency offsets. When a conventional echo canceller using linear adaptive filter (EC-LAF) is used for the system, it cannot cancel out the echo because the optimal echo path fluctuates. However, the echo replica, which is the output signal of EC-LAF, and the residual echo have correlation, which is similar to the residual echo model in the NLEC and leads to the effectiveness of the NLEC. Simulations with speech signals including doubletalk periods demonstrate that the echo suppression performance of the NLEC is approximately 20 dB higher than that of the EC-LAF. Furthermore, mean opinion score shows that the near-end speech quality of the NLEC is 0.5 point higher than that of EC-LAF.
Keyword (in Japanese) (See Japanese page) 
(in English) hands-free communication / sampling-frequency offset / nonlinear-echo canceller / / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 472, EA2009-118, pp. 19-24, March 2010.
Paper # EA2009-118 
Date of Issue 2010-03-19 (EA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 EA  
Conference Date 2010-03-26 - 2010-03-26 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To EA 
Conference Code 2010-03-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of a nonlinear-echo canceller applied to a hands-free communication system with sampling-frequency offsets 
Sub Title (in English)  
Keyword(1) hands-free communication  
Keyword(2) sampling-frequency offset  
Keyword(3) nonlinear-echo canceller  
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1st Author's Name Yasuhiro Mochida  
1st Author's Affiliation The University of Tokyo (Univ. of Tokyo)
2nd Author's Name Osamu Hoshuyama  
2nd Author's Affiliation NEC Corporation (NEC)
3rd Author's Name Toshiyuki Nomura  
3rd Author's Affiliation NEC Corporation (NEC)
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Speaker Author-1 
Date Time 2010-03-26 15:15:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2009-118 
Volume (vol) vol.109 
Number (no) no.472 
Page pp.19-24 
#Pages
Date of Issue 2010-03-19 (EA) 


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