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Paper Abstract and Keywords
Presentation 2015-07-16 17:20
Experimental evaluation of network size effect in speaker adaptive trained DNNs embedding linear transformation networks
Tsubasa Ochiai (Doshisha Univ./NICT), Shigeki Matsuda (Doshisha Univ.), Hideyuki Watanabe, Xugang Lu, Hisashi Kawai (NICT), Shigeru Katagiri (Doshisha Univ.) SP2015-41
Abstract (in Japanese) (See Japanese page) 
(in English) Recently we proposed a novel speaker adaptation method that applied the Speaker Adaptive Training
(SAT) concept to DNN-HMM (SAT-DNN) recognizer and showed its fundamental utility from speaker adaptation
experiments using the TED Talks corpus data. The network employed in our previous experiment consisted of seven
layers: an input layer, five hidden layers, and an output layer. Every hidden layer had 512 nodes, but the validity
of such a network size (512 nodes per layer) was not ensured. Actually, the demonstrated effect of a SAT-DNN
recognizer might have originated from some by-effect of a small network. In addition to this standing question, we
revised SAT-DNN by embedding a Linear Transformation Network (LTN) in a hidden layer of DNN and demonstrated
the superiority over SAT-DNN of this new network called SAT-DNN-LTN. Taking these facts into account,
we investigate in this paper the effectiveness of larger SAT-DNN-LTN recognizers, whose hidden DNN layer has
1024 or 2048 nodes, in the same speaker adaptation experiment framework as in our previous paper. Experiment
results show that larger SAT-DNN-LTN recognizers steadily improve word recognition accuracies and successfully
prove the utility of the recognizer concept of SAT-DNN-LTN.
Keyword (in Japanese) (See Japanese page) 
(in English) Speaker Adaptive Training / Deep Neural Network / Linear Transformation Network / Regularized Adaptation / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 146, SP2015-41, pp. 31-36, July 2015.
Paper # SP2015-41 
Date of Issue 2015-07-09 (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)
Download PDF SP2015-41

Conference Information
Committee SP IPSJ-SLP  
Conference Date 2015-07-16 - 2015-07-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Katakura Suwako Hotel 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Speech recognition and understanding, dialog system, etc. 
Paper Information
Registration To SP 
Conference Code 2015-07-SP-SLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental evaluation of network size effect in speaker adaptive trained DNNs embedding linear transformation networks 
Sub Title (in English)  
Keyword(1) Speaker Adaptive Training  
Keyword(2) Deep Neural Network  
Keyword(3) Linear Transformation Network  
Keyword(4) Regularized Adaptation  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Tsubasa Ochiai  
1st Author's Affiliation Doshisha University/National Institute of Information and Communications Technology (Doshisha Univ./NICT)
2nd Author's Name Shigeki Matsuda  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Hideyuki Watanabe  
3rd Author's Affiliation National Institute of Information and Communications Technology (NICT)
4th Author's Name Xugang Lu  
4th Author's Affiliation National Institute of Information and Communications Technology (NICT)
5th Author's Name Hisashi Kawai  
5th Author's Affiliation National Institute of Information and Communications Technology (NICT)
6th Author's Name Shigeru Katagiri  
6th Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2015-07-16 17:20:00 
Presentation Time 30 minutes 
Registration for SP 
Paper # SP2015-41 
Volume (vol) vol.115 
Number (no) no.146 
Page pp.31-36 
#Pages 6 
Date of Issue 2015-07-09 (SP) 

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