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Paper Abstract and Keywords
Presentation 2012-07-19 13:30
A stable representation of group delay for periodic signals
Hideki Kawahara (Wakayama Univ.), Masanori Morise (Ritsumei. Univ.), Ryuichi Nisimura, Toshio Irino (Wakayama Univ.) EA2012-45
Abstract (in Japanese) (See Japanese page) 
(in English) Instantaneous frequency and group delay, which are defined as the temporal derivative and the frequency derivative of phase respectively, are better representations than phase itself, because they are physically meaningful and do not require unwrapping, which is a fragile operation. However, abrupt changes and discontinuities, which are caused by interference between constituent components prevented them from potential applications. As the final piece of the authors' investigations for providing interference-free representations of power spectrum and instantaneous frequency, an interference-free representation of group delay is introduced. It is derived from the group delay representation, analogues to Flanagan's instantaneous frequency representation. The interference-free group delay is the power spectrum weighted average of the shifted pair of group delays 1/2 fundamental frequency apart.
Keyword (in Japanese) (See Japanese page) 
(in English) power spectrum / instantaneous frequency / group delay / periodicisingals / Flanagan / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 125, EA2012-45, pp. 1-6, July 2012.
Paper # EA2012-45 
Date of Issue 2012-07-12 (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)
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Conference Information
Committee EA  
Conference Date 2012-07-19 - 2012-07-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Health Sci. Univ. of Hokkaido 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Engineering/Electro Acoustics, Musical Acoustics, Psychological and Physiological Acoustics, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2012-07-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A stable representation of group delay for periodic signals 
Sub Title (in English)  
Keyword(1) power spectrum  
Keyword(2) instantaneous frequency  
Keyword(3) group delay  
Keyword(4) periodicisingals  
Keyword(5) Flanagan  
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1st Author's Name Hideki Kawahara  
1st Author's Affiliation Wakayama University (Wakayama Univ.)
2nd Author's Name Masanori Morise  
2nd Author's Affiliation Ritsumeikan University (Ritsumei. Univ.)
3rd Author's Name Ryuichi Nisimura  
3rd Author's Affiliation Wakayama University (Wakayama Univ.)
4th Author's Name Toshio Irino  
4th Author's Affiliation Wakayama University (Wakayama Univ.)
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Speaker Author-1 
Date Time 2012-07-19 13:30:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2012-45 
Volume (vol) vol.112 
Number (no) no.125 
Page pp.1-6 
#Pages 6 
Date of Issue 2012-07-12 (EA) 

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