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Paper Abstract and Keywords
Presentation
Improving accuracy in spectral envelope estimation based on TANDEM-STRAIGHT -- Recovery of higher spatial frequency components exceeding Nyquist limit posed by the fundamental frequency --
Hideki Kawahara (Wakayama Univ.), Masanori Morise (Kwansei Univ.), Toru Takahashi (Kyoto Univ.), Hideki Banno (Meijo Univ.), Ryuichi Nisimura, Toshio Irino (Wakayama Univ.) SP2008-23
Abstract (in Japanese) (See Japanese page) 
(in English) A simple new method to recover details in a spectral envelope is proposed based on a speech analysis, modification and resynthesis framework called TANDEM-STRAIGHT. Spectral envelope recovery of voiced sounds is a discrete-to-analog conversion in the frequency domain. However, there is a fundamental problem because the spatial frequency contents of vocal tract functions generally exceed the Nyquist limit of the equivalent sampling rate determined by the fundamental frequency. TANDEM-STRAIGHT yields a method to recover a spectral envelope based on the consistent sampling theory and provides base information for exceeding this limit. At the final stage, the AR spectral envelope estimated from the TANDEM-STRAIGHT spectrum is divided by the F0 adaptively smoothed version of itself to supply the missing high-spatial-frequency details of the envelope.
Keyword (in Japanese) (See Japanese page) 
(in English) speech analysis / sampling theory / speech modification / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 116, SP2008-23, pp. 19-24, June 2008.
Paper # SP2008-23 
Date of Issue  
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 SP  
Conference Date 2008-06-27 - 2008-06-28 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) Speech Production, Speech Perception, Hearing and Speech, etc. 
Paper Information
Registration To SP 
Conference Code 2008-06-SP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improving accuracy in spectral envelope estimation based on TANDEM-STRAIGHT 
Sub Title (in English) Recovery of higher spatial frequency components exceeding Nyquist limit posed by the fundamental frequency 
Keyword(1) speech analysis  
Keyword(2) sampling theory  
Keyword(3) speech modification  
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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 Kwansei University (Kwansei Univ.)
3rd Author's Name Toru Takahashi  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Hideki Banno  
4th Author's Affiliation Meijo University (Meijo Univ.)
5th Author's Name Ryuichi Nisimura  
5th Author's Affiliation Wakayama University (Wakayama Univ.)
6th Author's Name Toshio Irino  
6th Author's Affiliation Wakayama University (Wakayama Univ.)
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Registration for SP 
Paper # SP2008-23 
Volume (vol) vol.108 
Number (no) no.116 
Page pp.19-24 
#Pages
Date of Issue  


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