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Paper Abstract and Keywords
Presentation 2026-03-02 11:40
Joint Optimization of Demixing Filters and Sampling Rate Offsets via Auxiliary-Function Approach
Hayato Takeuchi, Takao Kawamura, Nobutaka Ono (Tokyo Metropolitan Univ.), Shoko Araki (NTT) EA2025-83 SIP2025-103 SP2025-36
Abstract (in Japanese) (See Japanese page) 
(in English) In blind source separation using asynchronous distributed microphone arrays, the separation performance can be significantly degraded due to sampling rate offsets (SROs) that arise among recording devices. Conventional approaches have proposed a two-step procedure: estimating and compensating for the SRO through synchronization, followed by blind source separation. These processes are independently optimized based on different objective functions. In contrast, this study proposes a method in which both the SROs and the demixing filters are jointly optimized by a single objective function. Through evaluation experiments, we confirmed that the proposed method achieves performance comparable to conventional approaches.
Keyword (in Japanese) (See Japanese page) 
(in English) asynchronous distributed microphone array / sampling rate offsets / blind synchronization / blind source separation / auxiliary function method / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 369, EA2025-83, pp. 63-68, March 2026.
Paper # EA2025-83 
Date of Issue 2026-02-23 (EA, SIP, SP) 
ISSN 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 EA2025-83 SIP2025-103 SP2025-36

Conference Information
Committee SP EA SIP IPSJ-SLP  
Conference Date 2026-03-02 - 2026-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EA 
Conference Code 2026-03-SP-EA-SIP-SLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Joint Optimization of Demixing Filters and Sampling Rate Offsets via Auxiliary-Function Approach 
Sub Title (in English)  
Keyword(1) asynchronous distributed microphone array  
Keyword(2) sampling rate offsets  
Keyword(3) blind synchronization  
Keyword(4) blind source separation  
Keyword(5) auxiliary function method  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Hayato Takeuchi  
1st Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
2nd Author's Name Takao Kawamura  
2nd Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
3rd Author's Name Nobutaka Ono  
3rd Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
4th Author's Name Shoko Araki  
4th Author's Affiliation NTT, Inc. (NTT)
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Speaker Author-1 
Date Time 2026-03-02 11:40:00 
Presentation Time 20 minutes 
Registration for EA 
Paper # EA2025-83, SIP2025-103, SP2025-36 
Volume (vol) vol.125 
Number (no) no.369(EA), no.370(SIP), no.371(SP) 
Page pp.63-68 
#Pages 6 
Date of Issue 2026-02-23 (EA, SIP, SP) 

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