Yasunari OBUCHI


In-Vehicle Voice Interface with Improved Utterance Classification Accuracy Using Off-the-Shelf Cloud Speech Recognizer
Takeshi HOMMA Yasunari OBUCHI Kazuaki SHIMA Rintaro IKESHITA Hiroaki KOKUBO Takuya MATSUMOTO 
Publication:   
Publication Date: 2018/12/01
Vol. E101-D  No. 12  pp. 3123-3137
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
speech recognition errorsnatural language understandingcar navigationnoisy environmentcloud speech recognition
 Summary | Full Text:PDF(1.1MB)

Multichannel Two-Stage Beamforming with Unconstrained Beamformer and Distortion Reduction
Masahito TOGAMI Yohei KAWAGUCHI Yasunari OBUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/04/01
Vol. E96-A  No. 4  pp. 749-761
Type of Manuscript:  PAPER
Category: Engineering Acoustics
Keyword: 
beamformingmultichannel noise reductionreverberant environmentmicrophone array
 Summary | Full Text:PDF(1.5MB)

Intentional Voice Command Detection for Trigger-Free Speech Interface
Yasunari OBUCHI Takashi SUMIYOSHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/09/01
Vol. E93-D  No. 9  pp. 2440-2450
Type of Manuscript:  Special Section PAPER (Special Section on Processing Natural Speech Variability for Improved Verbal Human-Computer Interaction)
Category: Robust Speech Recognition
Keyword: 
speech recognitionspeech/non-speech discriminationVADutterance verificationemotion recognitionhands-freetrigger-freeIVCD
 Summary | Full Text:PDF(833.5KB)

Multi-Input Feature Combination in the Cepstral Domain for Practical Speech Recognition Systems
Yasunari OBUCHI Nobuo HATAOKA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2009/04/01
Vol. E92-D  No. 4  pp. 662-670
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
robust speech recognitionmicrophone arrayMFCCfeature combinationHMM
 Summary | Full Text:PDF(880.7KB)

Stepwise Phase Difference Restoration Method for DOA Estimation of Multiple Sources
Masahito TOGAMI Yasunari OBUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/11/01
Vol. E91-A  No. 11  pp. 3269-3281
Type of Manuscript:  PAPER
Category: Engineering Acoustics
Keyword: 
DOA estimationphase differenceacoustic applicationsacoustic arrays
 Summary | Full Text:PDF(451.2KB)

Normalization of Time-Derivative Parameters for Robust Speech Recognition in Small Devices
Yasunari OBUCHI Nobuo HATAOKA Richard M. STERN 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2004/04/01
Vol. E87-D  No. 4  pp. 1004-1011
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
robust speech recognitionPDAtime-derivativehistogram equalization
 Summary | Full Text:PDF(288.5KB)