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Paper Abstract and Keywords
Presentation 2026-08-28 13:55
[Invited Talk] Sparse Time-Frequency Analysis Based on the Reassignment Method and Its Applications
Tsubasa Kusano (Tokyo Metropolitan Univ) SIP2026-49
Abstract (in Japanese) (See Japanese page) 
(in English) Linear time-frequency analysis, such as the short-time Fourier transform (STFT), plays a crucial role in non-stationary signal processing. However, it suffers from limitations such as the time-frequency resolution trade-off stemming from Heisenberg's uncertainty principle and the resulting spectral smearing. This presentation provides an overview of the reassignment method, which enhances sparsity by relocating time-frequency components to coordinates determined by local instantaneous frequencies and group delays. Specifically, the mathematical foundations and principles of the reassignment method based on the STFT and wavelet transform are first outlined. Recent advanced techniques, including the synchrosqueezing transform capable of phase-preserving signal reconstruction as well as higher-order and extended methods, are then introduced. Furthermore, application examples in acoustic signal processing are presented.
Keyword (in Japanese) (See Japanese page) 
(in English) time-frequency reassignment / synchrosqueezing transform / instantaneous frequency / group delay / sparse time-frequency analysis / acoustic signal processing / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 157, SIP2026-49, pp. 70-70, Aug. 2026.
Paper # SIP2026-49 
Date of Issue 2026-08-20 (SIP) 
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 SIP2026-49

Conference Information
Committee SIP  
Conference Date 2026-08-27 - 2026-08-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Moriaki Ryokan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing, etc. 
Paper Information
Registration To SIP 
Conference Code 2026-08-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Sparse Time-Frequency Analysis Based on the Reassignment Method and Its Applications 
Sub Title (in English)  
Keyword(1) time-frequency reassignment  
Keyword(2) synchrosqueezing transform  
Keyword(3) instantaneous frequency  
Keyword(4) group delay  
Keyword(5) sparse time-frequency analysis  
Keyword(6) acoustic signal processing  
Keyword(7)  
Keyword(8)  
1st Author's Name Tsubasa Kusano  
1st Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ)
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Speaker Author-1 
Date Time 2026-08-28 13:55:00 
Presentation Time 35 minutes 
Registration for SIP 
Paper # SIP2026-49 
Volume (vol) vol.126 
Number (no) no.157 
Page p.70 
#Pages 1 
Date of Issue 2026-08-20 (SIP) 

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