Adaptive filtering based on cepstral representation-adaptive cepstral analysis of speech. - Keiichi Tokuda; Takao Kobayashi; Shoji Shiomoto; Satoshi Imai (ICASSP, 1990)

Generalized cepstral analysis of speech - unified approach to LPC and cepstral method. - Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICSLP, 1990)

An adaptive algorithm for mel-cepstral analysis of speech. - Toshiaki Fukada; Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICASSP, 1992)

Design of stable two-dimensional IIR digital filters with arbitrary magnitude function. - Takao Kobayashi; Kazuyoshi Fukushi; Keiichi Tokuda; Satoshi Imai (ICASSP, 1992)

Spectral estimation based on AR-model excited by t-distribution process. - Junibakti Sanubari; Keiichi Tokuda; Mahoki Onoda (ICASSP, 1992)

Robust recursive spectral estimation based on AR model excited by a t-distribution process. - Junibakti Sanubari; Keiichi Tokuda; Mahoki Onoda (ICASSP (3), 1994)

Speech coding based on adaptive mel-cepstral analysis. - Keiichi Tokuda; Hidetoshi Matsumura; Takao Kobayashi; Satoshi Imai (ICASSP (1), 1994)

Speech coding based on adaptive MEL-cepstral analysis for noisy channels. - Kazuhito Koishida; Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICSLP, 1994)

Mel-generalized cepstral analysis - a unified approach to speech spectral estimation. - Keiichi Tokuda; Takao Kobayashi; Takashi Masuko; Satoshi Imai (ICSLP, 1994)

AR Spectrum Estimation Based on Wavelet Representation. - Fernando Gil Resende; Keiichi Tokuda; Mineo Kaneko (ISCAS, 1994)

CELP coding based on mel-cepstral analysis. - Kazuhito Koishida; Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICASSP, 1995)

Speech parameter generation from HMM using dynamic features. - Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICASSP, 1995)

An algorithm for speech parameter generation from continuous mixture HMMs with dynamic features. - Keiichi Tokuda; Takashi Masuko; Tetsuya Yamada; Takao Kobayashi; Satoshi Imai (EUROSPEECH, 1995)

Adaptive cepstral analysis of speech. - Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (IEEE Trans. Speech Audio Process., 1995)

Speech synthesis using HMMs with dynamic features. - Takashi Masuko; Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICASSP, 1996)

Robust two dimensional spectral estimation based on AR model excited by a t-distribution process. - Junibakti Sanubari; Keiichi Tokuda; Mahoki Onoda (ICASSP, 1996)

CELP coding system based on mel-generalized cepstral analysis. - Kazuhito Koishida; Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICSLP, 1996)

Efficient encoding of mel-generalized cepstrum for CELP coders. - Kazuhito Koishida; Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICASSP, 1997)

Voice characteristics conversion for HMM-based speech synthesis system. - Takashi Masuko; Keiichi Tokuda; Takao Kobayashi; Satoshi Imai (ICASSP, 1997)

HMM compensation for noisy speech recognition based on cepstral parameter generation. - Takao Kobayashi; Takashi Masuko; Keiichi Tokuda (EUROSPEECH, 1997)

Speaker interpolation in HMM-based speech synthesis system. - Takayoshi Yoshimura; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi; Tadashi Kitamura (EUROSPEECH, 1997)

Visual Speech Synthesis Based on Parameter Generation From HMM: Speech-Driven and Text-And-Speech-Driven Approaches. - Masatsune Tamura; Takashi Masuko; Takao Kobayashi; Keiichi Tokuda (AVSP, 1998)

A wideband CELP speech coder at 16 kbit/s based on mel-generalized cepstral analysis. - Kazuhito Koishida; Gou Hirabayashi; Keiichi Tokuda; Takao Kobayashi (ICASSP, 1998)

Text-to-visual speech synthesis based on parameter generation from HMM. - Takashi Masuko; Takao Kobayashi; Masatsune Tamura; Jun Masubuchi; Keiichi Tokuda (ICASSP, 1998)

A very low bit rate speech coder using HMM-based speech recognition/synthesis techniques. - Keiichi Tokuda; Takashi Masuko; Jun Hiroi; Takao Kobayashi; Tadashi Kitamura (ICASSP, 1998)

A 16 kbit/s wideband CELP coder using MEL-generalized cepstral analysis and its subjective evaluation. - Kazuhito Koishida; Gou Hirabayashi; Keiichi Tokuda; Takao Kobayashi (ICSLP, 1998)

A very low bit rate speech coder using HMM with speaker adaptation. - Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (ICSLP, 1998)

HMM-based visual speech recognition using intensity and location normalization. - Oscar Vanegas; Akiji Tanaka; Keiichi Tokuda; Tadashi Kitamura (ICSLP, 1998)

Duration modeling for HMM-based speech synthesis. - Takayoshi Yoshimura; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (ICSLP, 1998)

Speaker adaptation for HMM-based speech synthesis system using MLLR. - Masatsune Tamura; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (SSW, 1998)

Robust recursive time series modeling based on an AR model excited by a t-distribution process. - Junibakti Sanubari; Keiichi Tokuda; Mahoki Onoda (IEEE Trans. Signal Process., 1998)

Hidden Markov models based on multi-space probability distribution for pitch pattern modeling. - Keiichi Tokuda; Takashi Masuko; Noboru Miyazaki; Takao Kobayashi (ICASSP, 1999)

Image Modeling Using Two Dimensional Exponential Systems. - Junibakti Sanubari; Keiichi Tokuda (ICIP (4), 1999)

Location Normalization of HMM-Based Lip Reading: Experiments for the M2VTS Database. - Oscar Vanegas; Keiichi Tokuda; Tadashi Kitamura (ICIP (2), 1999)

On the security of HMM-based speaker verification systems against imposture using synthetic speech. - Takashi Masuko; Takafumi Hitotsumatsu; Keiichi Tokuda; Takao Kobayashi (EUROSPEECH, 1999)

Intensity- and location-normalized training for HMM-based visual speech recognition. - Yoshihiko Nankaku; Keiichi Tokuda; Tadashi Kitamura (EUROSPEECH, 1999)

Simultaneous modeling of spectrum, pitch and duration in HMM-based speech synthesis. - Takayoshi Yoshimura; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (EUROSPEECH, 1999)

LMS-like two dimensional adaptive filter with t-distribution assumption and nonsymmetrical half-plane support. - Junibakti Sanubari; Keiichi Tokuda (NSIP, 1999)

A New Robust Two Dimensional Spectral Estimation Based on an AR Model Excited by a t Distribution Process and its QR-Decomposition Recursive Algorithm. - Junibakti Sanubari; Keiichi Tokuda (J. Circuits Syst. Comput., 1999)

Robust estimation of an AR multi-channel model by using t-distribution assumption. - Junibakti Sanubari; Keiichi Tokuda (EUSIPCO, 2000)

Speech parameter generation algorithms for HMM-based speech synthesis. - Keiichi Tokuda; Takayoshi Yoshimura; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (ICASSP, 2000)

Normalized Training for HMM-Based Visual Speech Recognition. - Yoshihiko Nankaku; Keiichi Tokuda; Tadashi Kitamura; Takao Kobayashi (ICIP, 2000)

Imposture using synthetic speech against speaker verification based on spectrum and pitch. - Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (INTERSPEECH, 2000)

Audio-visual speech recognition using MCE-based hmms and model-dependent stream weights. - Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (INTERSPEECH, 2000)

HMM-based text-to-audio-visual speech synthesis. - Shinji Sako; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (INTERSPEECH, 2000)

RLS-type two-dimensional adaptive filter with a t-distribution assumption. - Junibakti Sanubari; Keiichi Tokuda (Signal Process., 2000)

Speaker identification using Gaussian mixture models based on multi-space probability distribution. - Chiyomi Miyajima; Yosuke Hattori; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (ICASSP, 2001)

Adaptation of pitch and spectrum for HMM-based speech synthesis using MLLR. - Masatsune Tamura; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (ICASSP, 2001)

Minimum classification error training for speaker identification using Gaussian mixture models based on multi-space probability distribution. - Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (INTERSPEECH, 2001)

A robust speaker verification system against imposture using an HMM-based speech synthesis system. - Takayuki Satoh; Takashi Masuko; Takao Kobayashi; Keiichi Tokuda (INTERSPEECH, 2001)

Text-to-speech synthesis with arbitrary speaker's voice from average voice. - Masatsune Tamura; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (INTERSPEECH, 2001)

Mixed excitation for HMM-based speech synthesis. - Takayoshi Yoshimura; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (INTERSPEECH, 2001)

Fast convergence transversal adaptive filtering algorithm for impulsive environment based on T distribution assumption. - Junibakti Sanubari; Keiichi Tokuda (ISCAS (2), 2001)

Very low bit rate speech coding based on HMMs. - Jun Hiroi; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (Syst. Comput. Jpn., 2001)

A new approach to designing a feature extractor in speaker identification based on discriminative feature extraction. - Chiyomi Miyajima; Hideyuki Watanabe; Keiichi Tokuda; Tadashi Kitamura; Shigeru Katagiri (Speech Commun., 2001)

A new algorithm for updating adaptive system. - Junibakti Sanubari; Keiichi Tokuda (APCCAS (1), 2002)

Eigenvoices for HMM-based speech synthesis. - Kengo Shichiri; Atsushi Sawabe; Takayoshi Yoshimura; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (INTERSPEECH, 2002)

A context clustering technique for average voice model in HMM-based speech synthesis. - Junichi Yamagishi; Masatsune Tamura; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (INTERSPEECH, 2002)

Decision tree distribution tying based on a dimensional split technique. - Heiga Zen; Keiichi Tokuda; Tadashi Kitamura (INTERSPEECH, 2002)

Pitch pattern generation using multispace probability distribution HMM. - Takashi Masuko; Keiichi Tokuda; Noboru Miyazaki; Takao Kobayashi (Syst. Comput. Jpn., 2002)

Improving the performance of HMM-based very low bit rate speech coding. - Takahiro Hoshiya; Shinji Sako; Heiga Zen; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (ICASSP (1), 2003)

Speech recognition using voice-characteristic-dependent acoustic models. - Hiroyuki Suzuki; Heiga Zen; Yoshihiko Nankaku; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (ICASSP (1), 2003)

A training method for average voice model based on shared decision tree context clustering and speaker adaptive training. - Junichi Yamagishi; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (ICASSP (1), 2003)

Towards the development of a brazilian portuguese text-to-speech system based on HMM. - Ranniery Maia; Heiga Zen; Keiichi Tokuda; Tadashi Kitamura; Fernando Gil Vianna Resende Jr. (INTERSPEECH, 2003)

Trajectory modeling based on HMMs with the explicit relationship between static and dynamic features. - Keiichi Tokuda; Heiga Zen; Tadashi Kitamura (INTERSPEECH, 2003)

Decision tree-based simultaneous clustering of phonetic contexts, dimensions, and state positions for acoustic modeling. - Heiga Zen; Keiichi Tokuda; Tadashi Kitamura (INTERSPEECH, 2003)

Mixture Density Models Based on Mel-Cepstral Representation of Gaussian Process. - Toru Takahashi 003; Keiichi Tokuda; Takao Kobayashi; Tadashi Kitamura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003)

A Training Method of Average Voice Model for HMM-Based Speech Synthesis. - Junichi Yamagishi; Masatsune Tamura; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003)

Parameter sharing and minimum classification error training of mixtures of factor analyzers for speaker identification. - Hiroyoshi Yamamoto; Yoshihiko Nankaku; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (ICASSP (1), 2004)

A Viterbi algorithm for a trajectory model derived from HMM with explicit relationship between static and dynamic features. - Heiga Zen; Keiichi Tokuda; Tadashi Kitamura (ICASSP (1), 2004)

Deterministic annealing EM algorithm in parameter estimation for acoustic model. - Yohei Itaya; Heiga Zen; Yoshihiko Nankaku; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (INTERSPEECH, 2004)

Decision-tree backing-off in HMM-based speech synthesis. - Shunsuke Kataoka; Nobuaki Mizutani; Keiichi Tokuda; Tadashi Kitamura (INTERSPEECH, 2004)

Acoustic-to-articulatory inversion mapping with Gaussian mixture model. - Tomoki Toda; Alan W. Black; Keiichi Tokuda (INTERSPEECH, 2004)

Constructing emotional speech synthesizers with limited speech database. - Heiga Zen; Tadashi Kitamura; Murtaza Bulut; Shrikanth S. Narayanan; Ryosuke Tsuzuki; Keiichi Tokuda (INTERSPEECH, 2004)

Hidden semi-Markov model based speech synthesis. - Heiga Zen; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (INTERSPEECH, 2004)

XIMERA: a new TTS from ATR based on corpus-based technologies. - Hisashi Kawai; Tomoki Toda; Jinfu Ni; Minoru Tsuzaki; Keiichi Tokuda (SSW, 2004)

Mapping from articulatory movements to vocal tract spectrum with Gaussian mixture model for articulatory speech synthesis. - Tomoki Toda; Alan W. Black; Keiichi Tokuda (SSW, 2004)

An introduction of trajectory model into HMM-based speech synthesis. - Heiga Zen; Keiichi Tokuda; Tadashi Kitamura (SSW, 2004)

On the Use of Kernel PCA for Feature Extraction in Speech Recognition. - Amaro A. de Lima; Heiga Zen; Yoshihiko Nankaku; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (IEICE Trans. Inf. Syst., 2004)

Speaker adaptation of pitch and spectrum for HMM-based speech synthesis. - Masatsune Tamura; Takashi Masuko; Keiichi Tokuda; Takao Kobayashi (Syst. Comput. Jpn., 2004)

Galatea: Open-Source Software for Developing Anthropomorphic Spoken Dialog Agents. - Shinichi Kawamoto; Hiroshi Shimodaira; Tsuneo Nitta; Takuya Nishimoto; Satoshi Nakamura 001; Katsunobu Itou; Shigeo Morishima; Tatsuo Yotsukura; Atsuhiko Kai; Akinobu Lee; Yoichi Yamashita; Takao Kobayashi; et al. (Life-like characters, 2004)

Minimum Classification Error Interactive Training for Speaker Identification. - Yusuke Kida; Hiroyoshi Yamamoto; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (ICASSP (1), 2005)

Sparse KPCA for Feature Extraction in Speech Recognition. - Amaro A. de Lima; Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda; Tadashi Kitamura; Fernando Gil Resende (ICASSP (1), 2005)

Spectral Conversion Based on Maximum Likelihood Estimation Considering Global Variance of Converted Parameter. - Tomoki Toda; Alan W. Black; Keiichi Tokuda (ICASSP (1), 2005)

HMM-based european Portuguese TTS system. - Maria João Barros; Ranniery Maia; Keiichi Tokuda; Fernando Gil Resende; Diamantino Freitas (INTERSPEECH, 2005)

The blizzard challenge - 2005: evaluating corpus-based speech synthesis on common datasets. - Alan W. Black; Keiichi Tokuda (INTERSPEECH, 2005)

Deterministic Annealing EM Algorithm in Acoustic Modeling for Speaker and Speech Recognition. - Yohei Itaya; Heiga Zen; Yoshihiko Nankaku; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (IEICE Trans. Inf. Syst., 2005)

Applying Sparse KPCA for Feature Extraction in Speech Recognition. - Amaro A. de Lima; Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda; Tadashi Kitamura; Fernando Gil Resende (IEICE Trans. Inf. Syst., 2005)

Continuous Speech Recognition Based on General Factor Dependent Acoustic Models. - Hiroyuki Suzuki; Heiga Zen; Yoshihiko Nankaku; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (IEICE Trans. Inf. Syst., 2005)

Parameter Sharing in Mixture of Factor Analyzers for Speaker Identification. - Hiroyoshi Yamamoto; Yoshihiko Nankaku; Chiyomi Miyajima; Keiichi Tokuda; Tadashi Kitamura (IEICE Trans. Inf. Syst., 2005)

Incorporating a mixed excitation model and postfilter into HMM-based text-to-speech synthesis. - Takayoshi Yoshimura; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (Syst. Comput. Jpn., 2005)

Simultaneous clustering of phonetic context, dimension, and state position for acoustic modeling using decision trees. - Heiga Zen; Keiichi Tokuda; Tadashi Kitamura (Syst. Comput. Jpn., 2005)

Developing a Test Bed of English Text-to-Speech System XIMERA for the Blizzard Challenge 2006. - Tomoki Toda; Hisashi Kawai; Toshio Hirai; Jinfu Ni; Nobuyuki Nishizawa; Junichi Yamagishi; Minoru Tsuzaki; Keiichi Tokuda; Satoshi Nakamura 001 (Blizzard Challenge, 2006)

Face Recognition Based on Separable Lattice HMMS. - Daisuke Kurata; Yoshihiko Nankaku; Keiichi Tokuda; Tadashi Kitamura; Zoubin Ghahramani (ICASSP (5), 2006)

On the Use of Phonetic Information for Mapping from Articulatory Movements to Vocal Tract Spectrum. - Kenichi Nakamura; Tomoki Toda; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP (1), 2006)

Hidden Semi-Markov Model Based Speech Recognition System using Weighted Finite-State Transducer. - Keiichiro Oura; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (ICASSP (1), 2006)

Estimating Trajectory Hmm Parameters Using Monte Carlo Em With Gibbs Sampler. - Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda; Tadashi Kitamura (ICASSP (1), 2006)

Reducing computation on parallel decoding using frame-wise confidence scores. - Tomohiro Hakamata; Akinobu Lee; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2006)

An HMM-based singing voice synthesis system. - Keijiro Saino; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2006)

Voice conversion based on mixtures of factor analyzers. - Yosuke Uto; Yoshihiko Nankaku; Tomoki Toda; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2006)

Speaker adaptation of trajectory HMMs using feature-space MLLR. - Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda; Tadashi Kitamura (INTERSPEECH, 2006)

An HMM-Based Approach to Flexible Speech Synthesis. - Keiichi Tokuda (ISCSLP (Selected Papers), 2006)

Very low bit rate speech coding based on HMM with speaker adaptation. - Takashi Masuko; Takao Kobayashi; Keiichi Tokuda (Syst. Comput. Jpn., 2006)

ATRECSS - ATR English speech corpus for speech synthesis. - Jinfu Ni; Toshio Hirai; Hisashi Kawai; Tomoki Toda; Keiichi Tokuda; Minoru Tsuzaki; Shinsuke Sakai; Ranniery Maia; Satoshi Nakamura 001 (Blizzard Challenge, 2007)

Speaker-independent HMM-based speech synthesis system - HTS-2007 system for the Blizzard Challenge 2007. - Junichi Yamagishi; Heiga Zen; Tomoki Toda; Keiichi Tokuda (Blizzard Challenge, 2007)

Face Recognition using Hidden Markov Eigenface Models. - Yoshihiko Nankaku; Keiichi Tokuda (ICASSP (2), 2007)

A trainable excitation model for HMM-based speech synthesis. - Ranniery Maia; Tomoki Toda; Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2007)

Model-space MLLR for trajectory HMMs. - Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2007)

An excitation model for HMM-based speech synthesis based on residual modeling. - Ranniery Maia; Tomoki Toda; Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2007)

Spectral conversion based on statistical models including time-sequence matching. - Yoshihiko Nankaku; Kenichi Nakamura; Tomoki Toda; Keiichi Tokuda (SSW, 2007)

Communicative speech synthesis with XIMERA: a first step. - Shinsuke Sakai; Jinfu Ni; Ranniery Maia; Keiichi Tokuda; Minoru Tsuzaki; Tomoki Toda; Hisashi Kawai; Satoshi Nakamura 001 (SSW, 2007)

Improved average-voice-based speech synthesis using gender-mixed modeling and a parameter generation algorithm considering GV. - Junichi Yamagishi; Takao Kobayashi; Steve Renals; Simon King 001; Heiga Zen; Tomoki Toda; Keiichi Tokuda (SSW, 2007)

The HMM-based speech synthesis system (HTS) version 2.0. - Heiga Zen; Takashi Nose; Junichi Yamagishi; Shinji Sako; Takashi Masuko; Alan W. Black; Keiichi Tokuda (SSW, 2007)

Reformulating the HMM as a trajectory model by imposing explicit relationships between static and dynamic feature vector sequences. - Heiga Zen; Keiichi Tokuda; Tadashi Kitamura (Comput. Speech Lang., 2007)

A Speech Parameter Generation Algorithm Considering Global Variance for HMM-Based Speech Synthesis. - Tomoki Toda; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2007)

State Duration Modeling for HMM-Based Speech Synthesis. - Heiga Zen; Takashi Masuko; Keiichi Tokuda; Takayoshi Yoshimura; Takao Kobayashi; Tadashi Kitamura (IEICE Trans. Inf. Syst., 2007)

A Hidden Semi-Markov Model-Based Speech Synthesis System. - Heiga Zen; Keiichi Tokuda; Takashi Masuko; Takao Kobayashi; Tadashi Kitamura (IEICE Trans. Inf. Syst., 2007)

Details of the Nitech HMM-Based Speech Synthesis System for the Blizzard Challenge 2005. - Heiga Zen; Tomoki Toda; Masaru Nakamura; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2007)

Vector quantization of mel-cepstral coefficients using distortion measure for spectral analysis. - Toru Takahashi 003; Keiichi Tokuda; Takao Kobayashi; Tadashi Kitamura (Syst. Comput. Jpn., 2007)

Voice Conversion Based on Maximum-Likelihood Estimation of Spectral Parameter Trajectory. - Tomoki Toda; Alan W. Black; Keiichi Tokuda (IEEE Trans. Speech Audio Process., 2007)

The NICT/ATR speech synthesis system for the Blizzard Challenge 2008. - Ranniery Maia; Jinfu Ni; Shinsuke Sakai; Tomoki Toda; Keiichi Tokuda; Tohru Shimizu; Satoshi Nakamura 001 (Blizzard Challenge, 2008)

The HTS-2008 System: Yet Another Evaluation of the Speaker-Adaptive HMM-based Speech Synthesis System in The 2008 Blizzard Challenge. - Junichi Yamagishi; Heiga Zen; Yi-Jian Wu; Tomoki Toda; Keiichi Tokuda (Blizzard Challenge, 2008)

On the state definition for a trainable excitation model in HMM-based speech synthesis. - Ranniery Maia; Tomoki Toda; Keiichi Tokuda; Shinichi Sakai; Shun Nakamura (ICASSP, 2008)

Acoustic modeling with contextual additive structure for HMM-based speech recognition. - Yoshihiko Nankaku; Kazuhiro Nakamura; Heiga Zen; Keiichi Tokuda (ICASSP, 2008)

Statistical approach to vocal tract transfer function estimation based on factor analyzed trajectory HMM. - Tomoki Toda; Keiichi Tokuda (ICASSP, 2008)

Performance evaluation of the speaker-independent HMM-based speech synthesis system "HTS 2007" for the Blizzard Challenge 2007. - Junichi Yamagishi; Takashi Nose; Heiga Zen; Tomoki Toda; Keiichi Tokuda (ICASSP, 2008)

Bayesian context clustering using cross valid prior distribution for HMM-based speech recognition. - Kei Hashimoto; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2008)

Speaker recognition based on variational Bayesian method. - Tatsuya Ito; Kei Hashimoto; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2008)

Unsupervised adaptation for HMM-based speech synthesis. - Simon King 001; Keiichi Tokuda; Heiga Zen; Junichi Yamagishi (INTERSPEECH, 2008)

Acoustic modeling based on model structure annealing for speech recognition. - Sayaka Shiota; Kei Hashimoto; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2008)

Minimum generation error training with direct log spectral distortion on LSPs for HMM-based speech synthesis. - Yi-Jian Wu; Keiichi Tokuda (INTERSPEECH, 2008)

Probabilistic answer selection based on conditional random fields for spoken dialog system. - Yoshitaka Yoshimi; Ryota Kakitsuba; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2008)

Simultaneous conversion of duration and spectrum based on statistical models including time-sequence matching. - Kaori Yutani; Yosuke Uto; Yoshihiko Nankaku; Tomoki Toda; Keiichi Tokuda (INTERSPEECH, 2008)

Probabilistic feature mapping based on trajectory HMMs. - Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2008)

Simultaneous Acoustic, Prosodic, and Phrasing Model Training for TTs Conversion Systems. - Keiichiro Oura; Yoshihiko Nankaku; Tomoki Toda; Keiichi Tokuda; Ranniery Maia; Shinsuke Sakai; Satoshi Nakamura 001 (ISCSLP, 2008)

Cross-Lingual Speaker Adaptation for HMM-Based Speech Synthesis. - Yi-Jian Wu; Simon King 001; Keiichi Tokuda (ISCSLP, 2008)

A Fully Consistent Hidden Semi-Markov Model-Based Speech Recognition System. - Keiichiro Oura; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2008)

The Nitech-NAIST HMM-Based Speech Synthesis System for the Blizzard Challenge 2006. - Heiga Zen; Tomoki Toda; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2008)

Statistical mapping between articulatory movements and acoustic spectrum using a Gaussian mixture model. - Tomoki Toda; Alan W. Black; Keiichi Tokuda (Speech Commun., 2008)

The NICT Entry for the Blizzard Challenge 2009: an Enhanced HMM-based Speech Synthesis System with Trajectory Training considering Global Variance and State-Dependent Mixed Excitation. - Ranniery Maia; Tomoki Toda; Shinsuke Sakai; Yoshinori Shiga; Jinfu Ni; Hisashi Kawai; Keiichi Tokuda; Minoru Tsuzaki; Satoshi Nakamura 001 (Blizzard Challenge, 2009)

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2009. - Keiichiro Oura; Yi-Jian Wu; Keiichi Tokuda (Blizzard Challenge, 2009)

A Bayesian approach to HMM-based speech synthesis. - Kei Hashimoto; Heiga Zen; Yoshihiko Nankaku; Takashi Masuko; Keiichi Tokuda (ICASSP, 2009)

Full covariance state duration modeling for HMM-based speech synthesis. - Heng Lu 002; Yi-Jian Wu; Keiichi Tokuda; Li-Rong Dai 001; Ren-Hua Wang (ICASSP, 2009)

Minimum generation error training by using original spectrum as reference for log spectral distortion measure. - Yi-Jian Wu; Keiichi Tokuda (ICASSP, 2009)

Voice conversion based on simultaneous modelling of spectrum and F0. - Kaori Yutani; Yosuke Uto; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (ICASSP, 2009)

Stereo-based stochastic noise compensation based on trajectory GMMS. - Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2009)

A Bayesian approach to Hidden Semi-Markov Model based speech synthesis. - Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2009)

A decision tree-based clustering approach to state definition in an excitation modeling framework for HMM-based speech synthesis. - Ranniery Maia; Tomoki Toda; Keiichi Tokuda; Shinsuke Sakai; Satoshi Nakamura 001 (INTERSPEECH, 2009)

Tying covariance matrices to reduce the footprint of HMM-based speech synthesis systems. - Keiichiro Oura; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2009)

Deterministic annealing based training algorithm for Bayesian speech recognition. - Sayaka Shiota; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2009)

State mapping based method for cross-lingual speaker adaptation in HMM-based speech synthesis. - Yi-Jian Wu; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2009)

An improved minimum generation error based model adaptation for HMM-based speech synthesis. - Yi-Jian Wu; Long Qin; Keiichi Tokuda (INTERSPEECH, 2009)

Thousands of voices for HMM-based speech synthesis. - Junichi Yamagishi; Bela Usabaev; Simon King 001; Oliver Watts; John Dines; Jilei Tian; Rile Hu; Yong Guan; Keiichiro Oura; Keiichi Tokuda; Reima Karhila; Mikko Kurimo (INTERSPEECH, 2009)

Reordering Model Using Syntactic Information of a Source Tree for Statistical Machine Translation. - Kei Hashimoto; Hirohumi Yamamoto; Hideo Okuma; Eiichiro Sumita; Keiichi Tokuda (SSST@HLT-NAACL, 2009)

A Reordering Model Using a Source-Side Parse-Tree for Statistical Machine Translation. - Kei Hashimoto; Hirofumi Yamamoto; Hideo Okuma; Eiichiro Sumita; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2009)

Statistical parametric speech synthesis. - Heiga Zen; Keiichi Tokuda; Alan W. Black (Speech Commun., 2009)

Robust Speaker-Adaptive HMM-Based Text-to-Speech Synthesis. - Junichi Yamagishi; Takashi Nose; Heiga Zen; Zhen-Hua Ling; Tomoki Toda; Keiichi Tokuda; Simon King 001; Steve Renals (IEEE Trans. Speech Audio Process., 2009)

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2010. - Keiichiro Oura; Kei Hashimoto; Sayaka Shiota; Keiichi Tokuda (Blizzard Challenge, 2010)

NICT Blizzard Challenge 2010 Entry. - Yoshinori Shiga; Tomoki Toda; Shinsuke Sakai; Jinfu Ni; Hisashi Kawai; Keiichi Tokuda; Minoru Tsuzaki; Satoshi Nakamura 001 (Blizzard Challenge, 2010)

A Deterministic Annealing-Based Training Algorithm For Statistical Machine Translation Models. - Pascual Martínez-Gómez; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda; Germán Sanchis-Trilles (EAMT, 2010)

Factor analyzed voice models for HMM-based speech synthesis. - Kyosuke Kazumi; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2010)

Unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis. - Keiichiro Oura; Keiichi Tokuda; Junichi Yamagishi; Simon King 001; Mirjam Wester (ICASSP, 2010)

Face recognition based on separable lattice 2-D HMM with state duration modeling. - Yoshiaki Takahashi; Akira Tamamori; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2010)

Statistical parametric speech synthesis based on product of experts. - Heiga Zen; Mark J. F. Gales; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2010)

Speaker adaptation based on nonlinear spectral transform for speech recognition. - Toyohiro Hayashi; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2010)

HMM-based singing voice synthesis system using pitch-shifted pseudo training data. - Ayami Mase; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2010)

Voice activity detection based on conditional random fields using multiple features. - Akira Saito; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (INTERSPEECH, 2010)

Bayesian speech synthesis framework integrating training and synthesis processes. - Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2010)

Recent development of the HMM-based singing voice synthesis system - Sinsy. - Keiichiro Oura; Ayami Mase; Tomohiko Yamada; Satoru Muto; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2010)

Spectral modeling with contextual additive structure for HMM-based speech synthesis. - Shinji Takaki; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2010)

Speaker adaptation and the evaluation of speaker similarity in the EMIME speech-to-speech translation project. - Mirjam Wester; John Dines; Matthew Gibson; Hui Liang; Yi-Jian Wu; Lakshmi Babu Saheer; Simon King 001; Keiichiro Oura; Philip N. Garner; William Byrne; Yong Guan; Teemu Hirsimäki; et al. (SSW, 2010)

A Covariance-Tying Technique for HMM-Based Speech Synthesis. - Keiichiro Oura; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2010)

Thousands of Voices for HMM-Based Speech Synthesis-Analysis and Application of TTS Systems Built on Various ASR Corpora. - Junichi Yamagishi; Bela Usabaev; Simon King 001; Oliver Watts; John Dines; Jilei Tian; Yong Guan; Rile Hu; Keiichiro Oura; Yi-Jian Wu; Keiichi Tokuda; Reima Karhila; et al. (IEEE Trans. Speech Audio Process., 2010)

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2011. - Kei Hashimoto; Shinji Takaki; Keiichiro Oura; Keiichi Tokuda (Blizzard Challenge, 2011)

An analysis of machine translation and speech synthesis in speech-to-speech translation system. - Kei Hashimoto; Junichi Yamagishi; William J. Byrne; Simon King 001; Keiichi Tokuda (ICASSP, 2011)

Global variance modeling on frequency domain delta LSP for HMM-based speech synthesis. - Shifeng Pan; Yoshihiko Nankaku; Keiichi Tokuda; Jianhua Tao 001 (ICASSP, 2011)

An optimization algorithm of independent mean and variance parameter tying structures for HMM-based speech synthesis. - Shinji Takaki; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2011)

Estimation of Window Coefficients for Dynamic Feature Extraction for HMM-Based Speech Synthesis. - Ling-Hui Chen; Yoshihiko Nankaku; Heiga Zen; Keiichi Tokuda; Zhen-Hua Ling; Li-Rong Dai 001 (INTERSPEECH, 2011)

Multi-Speaker Modeling with Shared Prior Distributions and Model Structures for Bayesian Speech Synthesis. - Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2011)

Large-Scale Subjective Evaluations of Speech Rate Control Methods for HMM-Based Speech Synthesizers. - Tsuneo Kato; Makoto Yamada; Nobuyuki Nishizawa; Keiichiro Oura; Keiichi Tokuda (INTERSPEECH, 2011)

A Bayesian Approach to Voice Conversion Based on GMMs Using Multiple Model Structures. - Lei Li; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2011)

GMM-Based Missing-Feature Reconstruction on Multi-Frame Windows. - Ulpu Remes; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2011)

Estimation of Perceptual Spaces for Speaker Identities Based on the Cross-Lingual Discrimination Task. - Minoru Tsuzaki; Keiichi Tokuda; Hisashi Kawai; Jinfu Ni (INTERSPEECH, 2011)

Bayesian Context Clustering Using Cross Validation for Speech Recognition. - Kei Hashimoto; Heiga Zen; Yoshihiko Nankaku; Akinobu Lee; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2011)

Continuous Stochastic Feature Mapping Based on Trajectory HMMs. - Heiga Zen; Yoshihiko Nankaku; Keiichi Tokuda (IEEE Trans. Speech Audio Process., 2011)

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2012. - Shinji Takaki; Kei Sawada; Kei Hashimoto; Keiichiro Oura; Keiichi Tokuda (Blizzard Challenge, 2012)

Face recognition based on extended separable lattice 2-D HMMS. - Keisuke Kumaki; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2012)

Pitch adaptive training for hmm-based singing voice synthesis. - Keiichiro Oura; Ayami Mase; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2012)

Face recognition based on separable lattice 2-D HMMS using variational bayesian method. - Kei Sawada; Akira Tamamori; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2012)

A model structure integration based on a Bayesian framework for speech recognition. - Sayaka Shiota; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2012)

A Bayesian Approach to Speaker Recognition Based on GMMs Using Multiple Model Structures. - Takafumi Hattori; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2012)

Cross-lingual Speaker Adaptation for HMM-based Speech Synthesis based on Perceptual Characteristics and Speaker Interpolation. - Viviane de Franca Oliveira; Sayaka Shiota; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2012)

An Extension of Separable Lattice 2-D HMMs for Rotational Data Variations. - Akira Tamamori; Yoshihiko Nankaku; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2012)

Impacts of machine translation and speech synthesis on speech-to-speech translation. - Kei Hashimoto; Junichi Yamagishi; William Byrne; Simon King 001; Keiichi Tokuda (Speech Commun., 2012)

Analysis of unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis using KLD-based transform mapping. - Keiichiro Oura; Junichi Yamagishi; Mirjam Wester; Simon King 001; Keiichi Tokuda (Speech Commun., 2012)

Product of Experts for Statistical Parametric Speech Synthesis. - Heiga Zen; Mark J. F. Gales; Yoshihiko Nankaku; Keiichi Tokuda (IEEE Trans. Speech Audio Process., 2012)

Image recognition based on hidden Markov eigen-image models using variational Bayesian method. - Kei Sawada; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (APSIPA, 2013)

Realizing Tibetan speech synthesis by speaker adaptive training. - Hongwu Yang; Keiichiro Oura; Zhenye Gan; Keiichi Tokuda (APSIPA, 2013)

Overview of NITECH HMM-based speech synthesis system for Blizzard Challenge 2013. - Shinji Takaki; Kei Sawada; Kei Hashimoto; Keiichiro Oura; Keiichi Tokuda (Blizzard Challenge, 2013)

Mmdagent - A fully open-source toolkit for voice interaction systems. - Akinobu Lee; Keiichiro Oura; Keiichi Tokuda (ICASSP, 2013)

Separable lattice 2-D HMMS introducing state duration control for recognition of images with various variations. - Takaya Makino; Shinji Takaki; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2013)

Integration of acoustic modeling and mel-cepstral analysis for HMM-based speech synthesis. - Kazuhiro Nakamura; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2013)

Contextual partial additive structure for HMM-based speech synthesis. - Shinji Takaki; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2013)

Cross-lingual speaker adaptation based on factor analysis using bilingual speech data for HMM-based speech synthesis. - Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2013)

Personalising speech-to-speech translation: Unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis. - John Dines; Hui Liang; Lakshmi Babu Saheer; Matthew Gibson; William Byrne; Keiichiro Oura; Keiichi Tokuda; Junichi Yamagishi; Simon King 001; Mirjam Wester; Teemu Hirsimäki; Reima Karhila; et al. (Comput. Speech Lang., 2013)

A Bayesian Framework Using Multiple Model Structures for Speech Recognition. - Sayaka Shiota; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2013)

Speech Synthesis Based on Hidden Markov Models. - Keiichi Tokuda; Yoshihiko Nankaku; Tomoki Toda; Heiga Zen; Junichi Yamagishi; Keiichiro Oura (Proc. IEEE, 2013)

The Blizzard Challenge 2014. - Kishore Prahallad; Anandaswarup Vadapalli; Santosh Kesiraju; Hema A. Murthy; Swaran Lata; T. Nagarajan 001; S. R. Mahadeva Prasanna; Hemant A. Patil; Anil Kumar Sao; Simon King 001; Alan W. Black; Keiichi Tokuda (Blizzard Challenge, 2014)

Overview of NITECH HMM-based text-to-speech system for Blizzard Challenge 2014. - Kei Sawada; Shinji Takaki; Kei Hashimoto; Keiichiro Oura; Keiichi Tokuda (Blizzard Challenge, 2014)

Voice interaction system with 3D-CG virtual agent for stand-alone smartphones. - Daisuke Yamamoto; Keiichiro Oura; Ryota Nishimura; Takahiro Uchiya; Akinobu Lee; Ichi Takumi; Keiichi Tokuda (HAI, 2014)

HMM-Based singing voice synthesis and its application to Japanese and English. - Kazuhiro Nakamura; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2014)

Integration of speaker and pitch adaptive training for HMM-based singing voice synthesis. - Kanako Shirota; Kazuhiro Nakamura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2014)

A mel-cepstral analysis technique restoring high frequency components from low-sampling-rate speech. - Kazuhiro Nakamura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2014)

Integration of Spectral Feature Extraction and Modeling for HMM-Based Speech Synthesis. - Kazuhiro Nakamura; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2014)

Image Recognition Based on Separable Lattice Trajectory 2-D HMMs. - Akira Tamamori; Yoshihiko Nankaku; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2014)

Contextual Additive Structure for HMM-Based Speech Synthesis. - Shinji Takaki; Yoshihiko Nankaku; Keiichi Tokuda (IEEE J. Sel. Top. Signal Process., 2014)

Introduction to the Issue on Statistical Parametric Speech Synthesis. - Jianhua Tao 001; Keikichi Hirose; Keiichi Tokuda; Alan W. Black; Simon King 001 (IEEE J. Sel. Top. Signal Process., 2014)

The Blizzard Challenge 2015. - Kishore Prahallad; Anandaswarup Vadapalli; Sai Krishna Rallabandi; Santosh Kesiraju; Hema A. Murthy; T. Nagarajan 001; Bira Chandra Singh; T. Sajani; K. Sreenivasa Rao; Suryakanth V. Gangashetty; Simon King 001; Keiichi Tokuda; et al. (Blizzard Challenge, 2015)

The NITECH HMM-based text-to-speech system for the Blizzard Challenge 2015. - Kei Sawada; Kei Hashimoto; Keiichiro Oura; Keiichi Tokuda (Blizzard Challenge, 2015)

The effect of neural networks in statistical parametric speech synthesis. - Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2015)

Directly modeling speech waveforms by neural networks for statistical parametric speech synthesis. - Keiichi Tokuda; Heiga Zen (ICASSP, 2015)

Simultaneous optimization of multiple tree structures for factor analyzed HMM-based speech synthesis. - Takenori Yoshimura; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2015)

Using speaker adaptive training to realize Mandarin-Tibetan cross-lingual speech synthesis. - Hongwu Yang; Keiichiro Oura; Haiyan Wang; Zhenye Gan; Keiichi Tokuda (Multim. Tools Appl., 2015)

The NITech text-to-speech system for the Blizzard Challenge 2016. - Kei Sawada; Chiaki Asai; Kei Hashimoto; Keiichiro Oura; Keiichi Tokuda (Blizzard Challenge, 2016)

Trajectory training considering global variance for speech synthesis based on neural networks. - Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2016)

Directly modeling voiced and unvoiced components in speech waveforms by neural networks. - Keiichi Tokuda; Heiga Zen (ICASSP, 2016)

Redefining the Linguistic Context Feature Set for HMM and DNN TTS Through Position and Parsing. - Rasmus Dall; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2016)

Voice Conversion Based on Trajectory Model Training of Neural Networks Considering Global Variance. - Naoki Hosaka; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2016)

Singing Voice Synthesis Based on Deep Neural Networks. - Masanari Nishimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2016)

A Hierarchical Predictor of Synthetic Speech Naturalness Using Neural Networks. - Takenori Yoshimura; Gustav Eje Henter; Oliver Watts; Mirjam Wester; Junichi Yamagishi; Keiichi Tokuda (INTERSPEECH, 2016)

Temporal modeling in neural network based statistical parametric speech synthesis. - Keiichi Tokuda; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku (SSW, 2016)

A Bayesian Approach to Image Recognition Based on Separable Lattice Hidden Markov Models. - Kei Sawada; Akira Tamamori; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (IEICE Trans. Inf. Syst., 2016)

User Generated Dialogue Systems: uDialogue. - Keiichi Tokuda; Akinobu Lee; Yoshihiko Nankaku; Keiichiro Oura; Kei Hashimoto; Daisuke Yamamoto; Ichi Takumi; Takahiro Uchiya; Shuhei Tsutsumi; Steve Renals; Junichi Yamagishi (Human-Harmonized Information Technology (2), 2017)

Generalization of Thai tone contour in HMM-based speech synthesis. - Anocha Rugchatjaroen; Sittipong Saychum; Keiichiro Oura; Keiichi Tokuda (APSIPA, 2017)

The blizzard machine learning challenge 2017. - Kei Sawada; Keiichi Tokuda; Simon King 001; Alan W. Black (ASRU, 2017)

The NITech text-to-speech system for the Blizzard Challenge 2017. - Kei Sawada; Kei Hashimoto; Keiichiro Oura; Keiichi Tokuda (Blizzard Challenge, 2017)

Image recognition based on discriminative models using features generated from separable lattice HMMS. - Yoshinari Tsuzuki; Kei Sawada; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2017)

Articulatory Text-to-Speech Synthesis Using the Digital Waveguide Mesh Driven by a Deep Neural Network. - Amelia Jane Gully; Takenori Yoshimura; Damian T. Murphy; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2017)

Simultaneous Optimization of Multiple Tree-Based Factor Analyzed HMM for Speech Synthesis. - Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (IEEE ACM Trans. Audio Speech Lang. Process., 2017)

Speech Synthesis Using WaveNet Vocoder Based on Periodic/Aperiodic Decomposition. - Takato Fujimoto; Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (APSIPA, 2018)

Recent Development of the DNN-based Singing Voice Synthesis System - Sinsy. - Yukiya Hono; Shumma Murata; Kazuhiro Nakamura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (APSIPA, 2018)

Image Recognition Based on Convolutional Neural Networks Using Features Generated from Separable Lattice Hidden Markov Models. - Takayuki Kasugai; Yoshinari Tsuzuki; Kei Sawada; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (APSIPA, 2018)

Speaker Adaptation for Speech Synthesis Based on Deep Neural Networks Using Hidden Semi-Markov Model Structures. - Kento Nakao; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (APSIPA, 2018)

Singing Voice Conversion Using Posted Waveform Data on Music Social Media. - Koki Senda; Yukiya Hono; Kei Sawada; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (APSIPA, 2018)

Discriminative Feature Extraction Based on Sequential Variational Autoencoder for Speaker Recognition. - Takenori Yoshimura; Natsumi Koike; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (APSIPA, 2018)

The NITech text-to-speech system for the Blizzard Challenge 2018. - Kei Sawada; Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (Blizzard Challenge, 2018)

Image Recognition Based on Separable Lattice Hmms Using a Deep Neural Network for Output Probability Distributions. - Eiji Ichikawa; Kei Sawada; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2018)

Statistical Voice Conversion Based on Wavenet. - Jumpei Niwa; Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2018)

WaveNet-Based Zero-Delay Lossless Speech Coding. - Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (SLT, 2018)

Mel-Cepstrum-Based Quantization Noise Shaping Applied to Neural-Network-Based Speech Waveform Synthesis. - Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (IEEE ACM Trans. Audio Speech Lang. Process., 2018)

Singing Voice Synthesis Based on Generative Adversarial Networks. - Yukiya Hono; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2019)

Speaker-dependent Wavenet-based Delay-free Adpcm Speech Coding. - Takenori Yoshimura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2019)

Statistical Approach to Speech Synthesis: Past, Present and Future. - Keiichi Tokuda (INTERSPEECH, 2019)

Impacts of input linguistic feature representation on Japanese end-to-end speech synthesis. - Takato Fujimoto; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2019)

Deep neural network based real-time speech vocoder with periodic and aperiodic inputs. - Keiichiro Oura; Kazuhiro Nakamura; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2019)

Low computational cost speech synthesis based on deep neural networks using hidden semi-Markov model structures. - Motoki Shimada; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (SSW, 2019)

Singing voice synthesis based on convolutional neural networks. - Kazuhiro Nakamura; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (CoRR, 2019)

Semi-Supervised Learning Based on Hierarchical Generative Models for End-to-End Speech Synthesis. - Takato Fujimoto; Shinji Takaki; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2020)

Fast and High-Quality Singing Voice Synthesis System Based on Convolutional Neural Networks. - Kazuhiro Nakamura; Shinji Takaki; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2020)

Hierarchical Multi-Grained Generative Model for Expressive Speech Synthesis. - Yukiya Hono; Kazuna Tsuboi; Kei Sawada; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2020)

A Vector Quantized Variational Autoencoder (VQ-VAE) Autoregressive Neural F0 Model for Statistical Parametric Speech Synthesis. - Xin Wang 037; Shinji Takaki; Junichi Yamagishi; Simon King 001; Keiichi Tokuda (IEEE ACM Trans. Audio Speech Lang. Process., 2020)

Periodnet: A Non-Autoregressive Waveform Generation Model with a Structure Separating Periodic and Aperiodic Components. - Yukiya Hono; Shinji Takaki; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2021)

PeriodNet: A Non-Autoregressive Raw Waveform Generative Model With a Structure Separating Periodic and Aperiodic Components. - Yukiya Hono; Shinji Takaki; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (IEEE Access, 2021)

Sinsy: A Deep Neural Network-Based Singing Voice Synthesis System. - Yukiya Hono; Kei Hashimoto; Keiichiro Oura; Yoshihiko Nankaku; Keiichi Tokuda (IEEE ACM Trans. Audio Speech Lang. Process., 2021)

Autoregressive Variational Autoencoder with a Hidden Semi-Markov Model-Based Structured Attention for Speech Synthesis. - Takato Fujimoto; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2022)

End-to-End Text-to-Speech Based on Latent Representation of Speaking Styles Using Spontaneous Dialogue. - Kentaro Mitsui; Tianyu Zhao 001; Kei Sawada; Yukiya Hono; Yoshihiko Nankaku; Keiichi Tokuda (INTERSPEECH, 2022)

Singing Voice Synthesis Based on a Musical Note Position-Aware Attention Mechanism. - Yukiya Hono; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2023)

Lightweight, Multi-Speaker, Multi-Lingual Indic Text-to-Speech. - Abhayjeet Singh; Amala Nagireddi; Deekshitha G; Jesuraja Bandekar; Roopa R.; Sandhya Badiger; Sathvik Udupa; Prasanta Kumar Ghosh; Hema A. Murthy; Heiga Zen; Pranaw Kumar; Kamal Kant; et al. (ICASSP, 2023)

Embedding a Differentiable Mel-Cepstral Synthesis Filter to a Neural Speech Synthesis System. - Takenori Yoshimura; Shinji Takaki; Kazuhiro Nakamura; Keiichiro Oura; Yukiya Hono; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2023)

SPTK4: An Open-Source Software Toolkit for Speech Signal Processing. - Takenori Yoshimura; Takato Fujimoto; Keiichiro Oura; Keiichi Tokuda (SSW, 2023)

Singing voice synthesis based on frame-level sequence-to-sequence models considering vocal timing deviation. - Miku Nishihara; Yukiya Hono; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (CoRR, 2023)

PeriodGrad: Towards Pitch-Controllable Neural Vocoder Based on a Diffusion Probabilistic Model. - Yukiya Hono; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (ICASSP, 2024)

LIMMITS'24: Multi-Speaker, Multi-Lingual Indic TTS with Voice Cloning. - Abhayjeet Singh; Amala Nagireddi; Deekshitha G; Jesuraja Bandekar; Roopa R.; Sandhya Badiger; Sathvik Udupa; Prasanta Kumar Ghosh; Hema A. Murthy; Pranaw Kumar; Keiichi Tokuda; Mark Hasegawa-Johnson; et al. (ICASSP Workshops, 2024)

V2Coder: A Non-Autoregressive Vocoder Based on Hierarchical Variational Autoencoders. - Takato Fujimoto; Kei Hashimoto; Yoshihiko Nankaku; Keiichi Tokuda (IEEE Access, 2025)