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Paper Abstract and Keywords
Presentation 2010-12-21 16:40
Study on HMM-based F0 Coding for Very Low Bit-Rate Vocoder
Takashi Nose, Masashi Kumamoto, Takao Kobayashi (Tokyo Inst. of Tech.) NLC2010-28 SP2010-101
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a novel F0 coding technique for very low bit-rate HMM-based phonetic vocoder. Our technique is based on the multi-space distribution HMM (MSD-HMM) with quantized F0 symbols used as a prosodic context. By introducing the F0 symbol, we can model F0 values without using manually labeled speech data including accent information. In the encoding process, the F0 sequence extracted from an input utterance is converted into the quantized F0 symbol sequence, and these symbols are transmitted with the phonemes and state durations obtained by a phoneme recognizer. In the decoding process, context-dependent labels are created from the phonemes and F0 symbols, and the spectral and F0 sequences are generated using the pre-trained MSD-HMM on the basis of a maximum likelihood criterion. The experimental results show that the degradation of F0 quality through the coding process is not annoying even if the bit-rate for F0 is less than 50 bit/s.
Keyword (in Japanese) (See Japanese page) 
(in English) phonetic vocoder / HMM-based speech synthesis / very low bit-rate speech coding / quantized F0 context / multi-space distribution HMM (MSD-HMM) / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 357, SP2010-101, pp. 189-194, Dec. 2010.
Paper # SP2010-101 
Date of Issue 2010-12-13 (NLC, 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 NLC2010-28 SP2010-101

Conference Information
Committee NLC SP  
Conference Date 2010-12-20 - 2010-12-21 
Place (in Japanese) (See Japanese page) 
Place (in English) National Olympics Memorial Youth Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Information Access, Speech and Language Processing, etc. 
Paper Information
Registration To SP 
Conference Code 2010-12-NLC-SP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on HMM-based F0 Coding for Very Low Bit-Rate Vocoder 
Sub Title (in English)  
Keyword(1) phonetic vocoder  
Keyword(2) HMM-based speech synthesis  
Keyword(3) very low bit-rate speech coding  
Keyword(4) quantized F0 context  
Keyword(5) multi-space distribution HMM (MSD-HMM)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Takashi Nose  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Masashi Kumamoto  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Takao Kobayashi  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2010-12-21 16:40:00 
Presentation Time 90 minutes 
Registration for SP 
Paper # NLC2010-28, SP2010-101 
Volume (vol) vol.110 
Number (no) no.356(NLC), no.357(SP) 
Page pp.189-194 
#Pages 6 
Date of Issue 2010-12-13 (NLC, SP) 

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