Development of a formant-based analysis-synthesis system and generation of high quality liquid sounds of Japanese. - Nobuyuki Nishizawa; Nobuaki Minematsu; Keikichi Hirose (INTERSPEECH, 2000)

Separation of voiced source characteristics and vocal tract transfer function characteristics for speech sounds by iterative analysis based on AR-HMM model. - Nobuyuki Nishizawa; Keikichi Hirose; Nobuaki Minematsu (INTERSPEECH, 2002)

Estimation of resonant characteristics based on AR-HMM modeling and spectral envelope conversion of vowel sounds. - Nobuyuki Nishizawa; Keikichi Hirose; Nobuaki Minematsu (INTERSPEECH, 2003)

Scaling of waveform segments along the time axis for concatenative speech synthesis. - Nobuyuki Nishizawa; Hisashi Kawai (ICASSP (1), 2004)

Using a depth-restricted search to reduce delays in unit selection. - Nobuyuki Nishizawa; Hisashi Kawai (INTERSPEECH, 2004)

Analysis of major factors of naturalness degradation in concatenative synthesis. - Toshio Hirai; Hisashi Kawai; Minoru Tsuzaki; Nobuyuki Nishizawa (INTERSPEECH, 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)

A Short-Latency Unit Selection Method with Redundant Search for Concatenative Speech Synthesis. - Nobuyuki Nishizawa; Hisashi Kawai (ICASSP (1), 2006)

A preselection method based on cost degradation from the optimal sequence for concatenative speech synthesis. - Nobuyuki Nishizawa; Hisashi Kawai (INTERSPEECH, 2007)

Unit database pruning based on the cost degradation criterion for concatenative speech synthesis. - Nobuyuki Nishizawa; Hisashi Kawai (ICASSP, 2008)

An efficient beam pruning with a reward considering the potential to reach various words on a lexical tree. - Tsuneo Kato; Kengo Fujita; Nobuyuki Nishizawa (ICASSP, 2010)

Substitution of state distributions to reproduce natural prosody on HMM-based speech synthesizers. - Nobuyuki Nishizawa; Tsuneo Kato (SSW, 2010)

Accurate parameter generation using fixed-point arithmetic for embedded HMM-based speech synthesizers. - Nobuyuki Nishizawa; Tsuneo Kato (ICASSP, 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)

Efficient Beam Pruning for Speech Recognition with a Reward Considering the Potential to Reach Various Words on a Lexical Tree. - Tsuneo Kato; Kengo Fujita; Nobuyuki Nishizawa (IEICE Trans. Inf. Syst., 2011)

Speech synthesis using a non-maximally decimated filter bank for embedded systems. - Nobuyuki Nishizawa; Tsuneo Kato (INTERSPEECH, 2012)

Speech synthesis using subband-coded multiband source components and sinusoids. - Nobuyuki Nishizawa; Tsuneo Kato (ICASSP, 2013)

Speech synthesis using a maximally decimated pseudo QMF bank for embedded devices. - Nobuyuki Nishizawa; Tsuneo Kato (SSW, 2013)

Prosodic Reading Tutor of Japanese, Suzuki-kun: The first and only educational tool to teach the formal Japanese. - Nobuaki Minematsu; Daisuke Saito; Nobuyuki Nishizawa (SSW, 2016)

Wide Passband Design for Cosine-Modulated Filter Banks in Sinusoidal Speech Synthesis. - Nobuyuki Nishizawa; Tomonori Yazaki (SSW, 2016)

Investigating Accuracy of Pitch-accent Annotations in Neural Network-based Speech Synthesis and Denoising Effects. - Hieu-Thi Luong; Xin Wang 037; Junichi Yamagishi; Nobuyuki Nishizawa (INTERSPEECH, 2018)

Development and Evaluation of Japanese Text-to-speech Middleware for 32-Bit Microcontrollers. - Nobuyuki Nishizawa; Tomohiro Obara; Gen Hattori (ICASSP, 2019)

Training Multi-Speaker Neural Text-to-Speech Systems Using Speaker-Imbalanced Speech Corpora. - Hieu-Thi Luong; Xin Wang 037; Junichi Yamagishi; Nobuyuki Nishizawa (INTERSPEECH, 2019)

Evaluation of Block-Wise Parameter Generation for Statistical Parametric Speech Synthesis. - Nobuyuki Nishizawa; Tomohiro Obara; Gen Hattori (SSW, 2019)