Yoshihiko NANKAKU


A Bayesian Approach to Image Recognition Based on Separable Lattice Hidden Markov Models
Kei SAWADA Akira TAMAMORI Kei HASHIMOTO Yoshihiko NANKAKU Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/12/01
Vol. E99-D  No. 12  pp. 3119-3131
Type of Manuscript:  PAPER
Category: Pattern Recognition
Keyword: 
image recognitionhidden Markov modelsseparable lattice hidden Markov modelsBayesian approachdeterministic annealing
 Summary | Full Text:PDF(972.5KB)

Image Recognition Based on Separable Lattice Trajectory 2-D HMMs
Akira TAMAMORI Yoshihiko NANKAKU Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/07/01
Vol. E97-D  No. 7  pp. 1842-1854
Type of Manuscript:  PAPER
Category: Pattern Recognition
Keyword: 
image recognitionhidden Markov modelsseparable lattice 2-D HMMstrajectory HMMs
 Summary | Full Text:PDF(1.6MB)

Integration of Spectral Feature Extraction and Modeling for HMM-Based Speech Synthesis
Kazuhiro NAKAMURA Kei HASHIMOTO Yoshihiko NANKAKU Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/06/01
Vol. E97-D  No. 6  pp. 1438-1448
Type of Manuscript:  Special Section PAPER (Special Section on Advances in Modeling for Real-world Speech Information Processing and its Application)
Category: HMM-based Speech Synthesis
Keyword: 
integrative modelHMM-based speech synthesisacoustic modelingmel-cepstral analysistrajectory HMM
 Summary | Full Text:PDF(1.7MB)

A Bayesian Framework Using Multiple Model Structures for Speech Recognition
Sayaka SHIOTA Kei HASHIMOTO Yoshihiko NANKAKU Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2013/04/01
Vol. E96-D  No. 4  pp. 939-948
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
speech recognitionacoustic modelingBayesian approachmodel structure integrationdeterministic annealing
 Summary | Full Text:PDF(548.8KB)

An Extension of Separable Lattice 2-D HMMs for Rotational Data Variations
Akira TAMAMORI Yoshihiko NANKAKU Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2012/08/01
Vol. E95-D  No. 8  pp. 2074-2083
Type of Manuscript:  PAPER
Category: Pattern Recognition
Keyword: 
image recognitionhidden Markov modelsvariational method
 Summary | Full Text:PDF(1.3MB)

Bayesian Context Clustering Using Cross Validation for Speech Recognition
Kei HASHIMOTO Heiga ZEN Yoshihiko NANKAKU Akinobu LEE Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2011/03/01
Vol. E94-D  No. 3  pp. 668-678
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
Bayesian approachspeech recognitionHMMcontext clusteringcross validation
 Summary | Full Text:PDF(453.4KB)

A Covariance-Tying Technique for HMM-Based Speech Synthesis
Keiichiro OURA Heiga ZEN Yoshihiko NANKAKU Akinobu LEE Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/03/01
Vol. E93-D  No. 3  pp. 595-601
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
HMMspeech synthesisdecision treecontext-clusteringMDL criterionembedded device
 Summary | Full Text:PDF(662.9KB)

A Fully Consistent Hidden Semi-Markov Model-Based Speech Recognition System
Keiichiro OURA Heiga ZEN Yoshihiko NANKAKU Akinobu LEE Keiichi TOKUDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/11/01
Vol. E91-D  No. 11  pp. 2693-2700
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
speech recognitionhidden Markov modelhidden semi-Markov modelweighted finite-state transducer
 Summary | Full Text:PDF(531.3KB)

Parameter Sharing in Mixture of Factor Analyzers for Speaker Identification
Hiroyoshi YAMAMOTO Yoshihiko NANKAKU Chiyomi MIYAJIMA Keiichi TOKUDA Tadashi KITAMURA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/03/01
Vol. E88-D  No. 3  pp. 418-424
Type of Manuscript:  Special Section PAPER (Special Section on Corpus-Based Speech Technologies)
Category: Feature Extraction and Acoustic Medelings
Keyword: 
speaker identificationGMMmixture of factor analyzersparameter sharingminimum classification error training
 Summary | Full Text:PDF(545.3KB)

Deterministic Annealing EM Algorithm in Acoustic Modeling for Speaker and Speech Recognition
Yohei ITAYA Heiga ZEN Yoshihiko NANKAKU Chiyomi MIYAJIMA Keiichi TOKUDA Tadashi KITAMURA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/03/01
Vol. E88-D  No. 3  pp. 425-431
Type of Manuscript:  Special Section PAPER (Special Section on Corpus-Based Speech Technologies)
Category: Feature Extraction and Acoustic Medelings
Keyword: 
DAEM algorithmacoustic modelingEM algorithmGMMsHMMs
 Summary | Full Text:PDF(680.4KB)

Continuous Speech Recognition Based on General Factor Dependent Acoustic Models
Hiroyuki SUZUKI Heiga ZEN Yoshihiko NANKAKU Chiyomi MIYAJIMA Keiichi TOKUDA Tadashi KITAMURA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/03/01
Vol. E88-D  No. 3  pp. 410-417
Type of Manuscript:  Special Section PAPER (Special Section on Corpus-Based Speech Technologies)
Category: Feature Extraction and Acoustic Medelings
Keyword: 
continuous speech recognitiontriphone HMMscontext clusteringBayesian networksvoice characteristicnoise environment
 Summary | Full Text:PDF(487.4KB)

Applying Sparse KPCA for Feature Extraction in Speech Recognition
Amaro LIMA Heiga ZEN Yoshihiko NANKAKU Keiichi TOKUDA Tadashi KITAMURA Fernando G. RESENDE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/03/01
Vol. E88-D  No. 3  pp. 401-409
Type of Manuscript:  Special Section PAPER (Special Section on Corpus-Based Speech Technologies)
Category: Feature Extraction and Acoustic Medelings
Keyword: 
kernelsparsityprincipal component analysisfeature extractionspeech recognition
 Summary | Full Text:PDF(582.4KB)

On the Use of Kernel PCA for Feature Extraction in Speech Recognition
Amaro LIMA Heiga ZEN Yoshihiko NANKAKU Chiyomi MIYAJIMA Keiichi TOKUDA Tadashi KITAMURA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2004/12/01
Vol. E87-D  No. 12  pp. 2802-2811
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
kernelfeature spaceprincipal component analysisfeature extractionspeech recognition
 Summary | Full Text:PDF(425.6KB)