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Paper Abstract and Keywords
Presentation 2018-07-25 13:40
Interference-free power spectral representations of periodic sounds and their application to VOCODERs
Hideki Kawahara (Wakayama Univ.), Masanori Morise (Univ. Yamanashi), Kanru Hua (Univ. Illinois) EA2018-23
Abstract (in Japanese) (See Japanese page) 
(in English) We propose a method to calculate the spectral envelope of voiced sounds for VOCODER applications. In our previous technical report, we proposed two algorithms to calculate interference-free power spectra of periodic signals. This set of algorithms is our fourth reinvention of interference-free power spectral representations for legacy-STRAIGHT, TANDEM-STRAIGHT, and CheapTrick, 20, 10, and three years ago, respectively. The first method directly calculates the interference-free spectrogram using the one-stage procedure. The next method calculates an interference-free power spectrum in the time domain in the first stage. In the next stage, a fo adaptive procedure using moving averaging in the frequency domain removes the interference in the frequency domain. These two methods are using sinc function and smoothed rectangular function for representing spectral envelope and are not consistent with the transfer function of the vocal tract. We introduce a pre-processing and post-processing pipeline based on the autoregressive spectral model to alleviate this inconsistency.
Keyword (in Japanese) (See Japanese page) 
(in English) speech analysis / periodic signals / time-frequency representation / windowing function / cosine series / spline / autoregressive model /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 149, EA2018-23, pp. 135-140, July 2018.
Paper # EA2018-23 
Date of Issue 2018-07-17 (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)
Download PDF EA2018-23

Conference Information
Committee EA ASJ-H ASJ-AA  
Conference Date 2018-07-24 - 2018-07-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Engineering/Electro Acoustics, Psychological and Physiological Acoustics, Architectural Acoustics, Education in Acoustics, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2018-07-EA-H-AA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Interference-free power spectral representations of periodic sounds and their application to VOCODERs 
Sub Title (in English)  
Keyword(1) speech analysis  
Keyword(2) periodic signals  
Keyword(3) time-frequency representation  
Keyword(4) windowing function  
Keyword(5) cosine series  
Keyword(6) spline  
Keyword(7) autoregressive model  
Keyword(8)  
1st Author's Name Hideki Kawahara  
1st Author's Affiliation Wakayama University (Wakayama Univ.)
2nd Author's Name Masanori Morise  
2nd Author's Affiliation University of Yamanashi (Univ. Yamanashi)
3rd Author's Name Kanru Hua  
3rd Author's Affiliation University of Illinois (Univ. Illinois)
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Speaker Author-1 
Date Time 2018-07-25 13:40:00 
Presentation Time 25 minutes 
Registration for EA 
Paper # EA2018-23 
Volume (vol) vol.118 
Number (no) no.149 
Page pp.135-140 
#Pages 6 
Date of Issue 2018-07-17 (EA) 

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