Supplementation of HMM for articulatory variation in speaker adaptation. - Hiroaki Hattori; Satoshi Nakamura 001; Kiyohiro Shikano (ICASSP, 1990)

Speaker weighted training of HMM using multiple reference speakers. - Hiroaki Hattori; Satoshi Nakamura 001; Kiyohiro Shikano; Shigeki Sagayama (ICSLP, 1990)

Speaker adaptation based on Markov modeling of speakers in speaker-independent speech recognition. - Hiroaki Hattori (ICASSP, 1991)

Text-independent speaker recognition using neural networks. - Hiroaki Hattori (ICASSP, 1992)

Vector field smoothing principle for speaker adaptation. - Hiroaki Hattori; Shigeki Sagayama (ICSLP, 1992)

A normalization method of prediction error for neural networks. - Hiroaki Hattori (ICSLP, 1994)

Speech recognition with rapid environment adaptation by spectrum equalization. - Keizaburo Takagi; Hiroaki Hattori; Takao Watanabe (ICSLP, 1994)

Rapid environment adaptation for robust speech recognition. - Keizaburo Takagi; Hiroaki Hattori; Takao Watanabe (ICASSP, 1995)

Speech recognition using sub-word units dependent on phonetic contexts of both training and recognition vocabularies. - Hiroaki Hattori; Eiko Yamada (ICSLP, 1996)

Unsupervised and incremental speaker adaptation under adverse environmental conditions. - Keizaburo Takagi; Koichi Shinoda; Hiroaki Hattori; Takao Watanabe (ICSLP, 1996)

An Automatic Speech Translation System on PDAs for Travel Conversation. - Ryosuke Isotani; Kiyoshi Yamabana; Shinichi Ando; Ken Hanazawa; Shin-ya Ishikawa; Tadashi Emori; Ken-ichi Iso; Hiroaki Hattori; Akitoshi Okumura; Takao Watanabe (ICMI, 2002)

Efficient language model development for spoken dialogue recognition and its evaluation on operator's speech at call centers. - Kiyokazu Miki; Kaichiro Hatazaki; Hiroaki Hattori (PACLIC, 2006)

Identity Verification Using Face Recognition for Artificial-Intelligence Electronic Forms with Speech Interaction. - Akitoshi Okumura; Shuji Komeiji; Motohiko Sakaguchi; Masahiro Tabuchi; Hiroaki Hattori (HCI (29), 2019)

Unmanned Aircraft System Traffic Management (UTM) Simulation of Drone Delivery Models in 2030 Japan. - Atsushi Oosedo; Hiroaki Hattori; Ippei Yasui; Kenya Harada (J. Robotics Mechatronics, 2021)