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Paper Abstract and Keywords
Presentation 2016-03-28 13:15
[Poster Presentation] Nonaudible murmur enhancement based on non-negative tensor factorization of air- and body-conducted signals in real environments
Yusuke Tajiri (NAIST), Hirokazu Kameoka (NTT), Tomoki Toda (Nagoya Univ./NAIST), Satoshi Nakamura (NAIST)
Abstract (in Japanese) (See Japanese page) 
(in English) Nonaudible murmur (NAM) recorded with a special body-conductive microphone called NAM microphone is one of the promising silent speech interfaces but it easily suffers from external noise signals. To effectively suppress them from the body-conducted signals, external noise monitoring using an air-conductive microphone has been proposed. The noise suppression method using time-invariant linear filtering has been successfully implemented but its performance tends to degrade in real noisy environments including many moving sound sources. To address this issue, in this report, we propose a noise suppression method based on non-negative tensor factorization (NTF) of air- and body-conducted signals. Results of experimental evaluations using the noise signals recorded in real environments show that the proposed method yields significant improvements in signal-to-noise ratio (SNR) compared to the conventional method. The results also show that the proposed method is also effective for a change of speech characteristics caused by Lombard reflex.
Keyword (in Japanese) (See Japanese page) 
(in English) silent speech communication / nonaudible murmur / external noise monitoring / non-negative matrix factorization / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 523, SP2015-114, pp. 117-122, March 2016.
Paper # SP2015-114 
Date of Issue 2016-03-21 (EA, SIP, SP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee EA SP SIP  
Conference Date 2016-03-28 - 2016-03-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Beppu International Convention Center B-ConPlaza 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Engineering/Electro Acoustics, Speech, Signal Processing, and Related Topics 
Paper Information
Registration To SP 
Conference Code 2016-03-EA-SP-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Nonaudible murmur enhancement based on non-negative tensor factorization of air- and body-conducted signals in real environments 
Sub Title (in English)  
Keyword(1) silent speech communication  
Keyword(2) nonaudible murmur  
Keyword(3) external noise monitoring  
Keyword(4) non-negative matrix factorization  
1st Author's Name Yusuke Tajiri  
1st Author's Affiliation Nara Institute of Science and Technology (NAIST)
2nd Author's Name Hirokazu Kameoka  
2nd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
3rd Author's Name Tomoki Toda  
3rd Author's Affiliation Nagoya University/Nara Institute of Science and Technology (Nagoya Univ./NAIST)
4th Author's Name Satoshi Nakamura  
4th Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Date Time 2016-03-28 13:15:00 
Presentation Time 90 
Registration for SP 
Paper # IEICE-EA2015-86,IEICE-SIP2015-135,IEICE-SP2015-114 
Volume (vol) IEICE-115 
Number (no) no.521(EA), no.522(SIP), no.523(SP) 
Page pp.117-122 
#Pages IEICE-6 
Date of Issue IEICE-EA-2016-03-21,IEICE-SIP-2016-03-21,IEICE-SP-2016-03-21 

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