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Paper Abstract and Keywords
Presentation 2015-12-02 11:15
Evaluation and Analysis of Duration Correction for Non-Native Speech Based on Waveform Modification
Shinya Kura, Shinnosuke Takamichi (NAIST), Tomoki Toda (NAIST/Nagoya Univ.), Graham Neubig, Sakriani Sakti, Satoshi Nakamura (NAIST) SP2015-73
Abstract (in Japanese) (See Japanese page) 
(in English) There are several attempts at correcting durational patterns of non-native speech towards language learning. One of the typical approaches modifies a speech parameter sequence with Dynamic Time Warping (DTW) using native speech as the reference, generating corrected speech from the modified speech parameter sequence. Although this approach makes it possible to flexibly modify durational patterns of non-native speech, quality of the corrected speech significantly degrades due to the use of analysis-synthesis process to generate the corrected speech.
In this report, we propose a method for correcting durational patterns using direct waveform modification for performing DTW. In calculating a temporal warping function, statistical voice conversion is effectively used to reduce an adverse effect caused by speaker differences. Moreover, phoneme insertion often observed in non-native speech is also handled.
We conducted an experimental evaluation using English speech read by Japanese, demonstrating that the proposed method was capable of flexibly modifying durational patterns while avoiding quality degradation caused by the analysis-synthesis process. Furthermore, waveform segments suffering from quality degradation caused by temporal warping was analyzed using the modulation spectrum of spectral parameters.
Keyword (in Japanese) (See Japanese page) 
(in English) non-native speech / correction of durational patterns / dynamic time warping / waveform modification / modulation spectrum / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 346, SP2015-73, pp. 19-24, Dec. 2015.
Paper # SP2015-73 
Date of Issue 2015-11-25 (SP) 
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)
Notes on Review This article is a technical report without peer review, and its polished version will be published elsewhere.
Download PDF SP2015-73

Conference Information
Committee NLC IPSJ-NL SP IPSJ-SLP  
Conference Date 2015-12-02 - 2015-12-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Inst of Tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) The Second Natural Language Processing Symposium & The 17th Spoken Language Symposium 
Paper Information
Registration To SP 
Conference Code 2015-12-NLC-NL-SP-SLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation and Analysis of Duration Correction for Non-Native Speech Based on Waveform Modification 
Sub Title (in English)  
Keyword(1) non-native speech  
Keyword(2) correction of durational patterns  
Keyword(3) dynamic time warping  
Keyword(4) waveform modification  
Keyword(5) modulation spectrum  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Shinya Kura  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Shinnosuke Takamichi  
2nd Author's Affiliation Nara Institute of Science and Technology (NAIST)
3rd Author's Name Tomoki Toda  
3rd Author's Affiliation Nara Institute of Science and Technology/Nagoya University (NAIST/Nagoya Univ.)
4th Author's Name Graham Neubig  
4th Author's Affiliation Nara Institute of Science and Technology (NAIST)
5th Author's Name Sakriani Sakti  
5th Author's Affiliation Nara Institute of Science and Technology (NAIST)
6th Author's Name Satoshi Nakamura  
6th Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Speaker Author-1 
Date Time 2015-12-02 11:15:00 
Presentation Time 25 minutes 
Registration for SP 
Paper # SP2015-73 
Volume (vol) vol.115 
Number (no) no.346 
Page pp.19-24 
#Pages 6 
Date of Issue 2015-11-25 (SP) 

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