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Paper Abstract and Keywords
Presentation 2024-02-29 09:50
Derivation of Direct Update Rule for Back-Projected Separation Matrix
Yui Kuriki, Taishi Nakashima, Nobutaka Ono (TMU) EA2023-66 SIP2023-113 SP2023-48
Abstract (in Japanese) (See Japanese page) 
(in English) Blind source separation (BSS) is a widely used technique for separating mixed signals originating from multiple sources.
Traditionally, BSS is formulated as an optimization problem with respect to the demixing matrix $W$.
In order to resolve the scale ambiguity inherent in BSS, a post-processing step called "projection back" is employed, yielding a refined demixing matrix $tilde{W}$.
However, incorporating prior information or constraints directly on $tilde{W}$ has not been possible, as $tilde{W}$ is obtained only after the optimization and post-processing.

In this paper, we address this limitation by reformulating the BSS optimization problem in terms of $tilde{W}$ instead of $W$.
We propose novel algorithm for solving the reformulated problem, which are shown to monotonically decrease the objective function while satisfying the constraints. Through experiments, we demonstrate that our reformulation enables monotonically decrease the objective function.
Keyword (in Japanese) (See Japanese page) 
(in English) blind source separation / projection back / demixing matrix / independent vector analysis / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 401, EA2023-66, pp. 31-36, Feb. 2024.
Paper # EA2023-66 
Date of Issue 2024-02-22 (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 EA2023-66 SIP2023-113 SP2023-48

Conference Information
Committee SIP SP EA IPSJ-SLP  
Conference Date 2024-02-29 - 2024-03-01 
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 2024-02-SIP-SP-EA-SLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Derivation of Direct Update Rule for Back-Projected Separation Matrix 
Sub Title (in English)  
Keyword(1) blind source separation  
Keyword(2) projection back  
Keyword(3) demixing matrix  
Keyword(4) independent vector analysis  
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1st Author's Name Yui Kuriki  
1st Author's Affiliation Tokyo Metropolitan University (TMU)
2nd Author's Name Taishi Nakashima  
2nd Author's Affiliation Tokyo Metropolitan University (TMU)
3rd Author's Name Nobutaka Ono  
3rd Author's Affiliation Tokyo Metropolitan University (TMU)
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Speaker Author-1 
Date Time 2024-02-29 09:50:00 
Presentation Time 20 minutes 
Registration for EA 
Paper # EA2023-66, SIP2023-113, SP2023-48 
Volume (vol) vol.123 
Number (no) no.401(EA), no.402(SIP), no.403(SP) 
Page pp.31-36 
#Pages 6 
Date of Issue 2024-02-22 (EA, SIP, SP) 

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