Speaking-style dependent lexicalized filler model for key-phrase detection and verification. - Tatsuya Kawahara; Kentaro Ishizuka; Shuji Doshita; Chin-Hui Lee (ICSLP, 1998)

A Live Video Imaging Method for Capturing Presentation Information in Distance Learning. - Yoshinari Kameda; Kentaro Ishizuka; Michihiko Minoh (IEEE International Conference on Multimedia and Expo (III), 2000)

Noise-robust speech recognition using a new spectral estimation method "PHASOR". - Kiyoaki Aikawa; Kentaro Ishizuka (ICASSP, 2002)

Effect of F0 fluctuation and amplitude modulation of natural vowels on vowel identification in noisy environments. - Kentaro Ishizuka; Kiyoaki Aikawa (INTERSPEECH, 2002)

Speech feature extraction method representing periodicity and aperiodicity in sub bands for robust speech recognition. - Kentaro Ishizuka; Noboru Miyazaki (ICASSP (1), 2004)

Improvement in robustness of speech feature extraction method using sub-band based periodicity and aperiodicity decomposition. - Kentaro Ishizuka; Noboru Miyazaki; Tomohiro Nakatani; Yasuhiro Minami (INTERSPEECH, 2004)

Fundamental Frequency Estimation for Noisy Speech Using Entropy-Weighted Periodic and Harmonic Features. - Yuichi Ishimoto; Kentaro Ishizuka; Kiyoaki Aikawa; Masato Akagi (IEICE Trans. Inf. Syst., 2004)

Speech Signal Analysis with Exponential Autoregressive Model. - Kentaro Ishizuka; Hiroko Kato Solvang; Tomohiro Nakatani (ICASSP (1), 2005)

A longitudinal analysis of the spectral peaks of vowels for a Japanese infant. - Kentaro Ishizuka; Ryoko Mugitani; Hiroko Kato Solvang; Shigeaki Amano (INTERSPEECH, 2005)

A Feature for Voice Activity Detection Derived from Speech Analysis with the Exponential Autoregressive Model. - Kentaro Ishizuka; Hiroko Kato Solvang (ICASSP (1), 2006)

Study of noise robust voice activity detection based on periodic component to aperiodic component ratio. - Kentaro Ishizuka; Tomohiro Nakatani (SAPA@INTERSPEECH, 2006)

A feature extraction method using subband based periodicity and aperiodicity decomposition with noise robust frontend processing for automatic speech recognition. - Kentaro Ishizuka; Tomohiro Nakatani (Speech Commun., 2006)

Noise Robust Voice Activity Detection Based on Statistical Model and Parallel Non-Linear Kalman Filtering. - Masakiyo Fujimoto; Kentaro Ishizuka; Hiroko Kato Solvang (ICASSP (4), 2007)

Two-Microphone Voice Activity Detection Based on the Homogeneity of the Direction of Arrival Estimates. - Juan E. Rubio; Kentaro Ishizuka; Hiroshi Sawada; Shoko Araki; Tomohiro Nakatani; Masakiyo Fujimoto (ICASSP (4), 2007)

The world of mushrooms: human-computer interaction prototype systems for ambient intelligence. - Yasuhiro Minami; Minako Sawaki; Kohji Dohsaka; Ryuichiro Higashinaka; Kentaro Ishizuka; Hideki Isozaki; Tatsushi Matsubayashi; Masato Miyoshi; Atsushi Nakamura; Takanobu Oba; Hiroshi Sawada; Takeshi Yamada; et al. (ICMI, 2007)

Noise robust front-end processing with voice activity detection based on periodic to aperiodic component ratio. - Kentaro Ishizuka; Tomohiro Nakatani; Masakiyo Fujimoto; Noboru Miyazaki (INTERSPEECH, 2007)

Speaker indexing and speech enhancement in real meetings / conversations. - Shoko Araki; Masakiyo Fujimoto; Kentaro Ishizuka; Hiroshi Sawada; Shoji Makino (ICASSP, 2008)

A voice activity detection based on the adaptive integration of multiple speech features and a signal decision scheme. - Masakiyo Fujimoto; Kentaro Ishizuka; Tomohiro Nakatani (ICASSP, 2008)

A realtime multimodal system for analyzing group meetings by combining face pose tracking and speaker diarization. - Kazuhiro Otsuka; Shoko Araki; Kentaro Ishizuka; Masakiyo Fujimoto; Martin Heinrich; Junji Yamato (ICMI, 2008)

Study of integration of statistical model-based voice activity detection and noise suppression. - Masakiyo Fujimoto; Kentaro Ishizuka; Tomohiro Nakatani (INTERSPEECH, 2008)

Statistical speech activity detection based on spatial power distribution for analyses of poster presentations. - Kentaro Ishizuka; Shoko Araki; Tatsuya Kawahara (INTERSPEECH, 2008)

Multi-modal recording, analysis and indexing of poster sessions. - Tatsuya Kawahara; Hisao Setoguchi; Katsuya Takanashi; Kentaro Ishizuka; Shoko Araki (INTERSPEECH, 2008)

Noise Robust Voice Activity Detection Based on Switching Kalman Filter. - Masakiyo Fujimoto; Kentaro Ishizuka (IEICE Trans. Inf. Syst., 2008)

A method for fundamental frequency estimation and voicing decision: Application to infant utterances recorded in real acoustical environments. - Tomohiro Nakatani; Shigeaki Amano; Toshio Irino; Kentaro Ishizuka; Tadahisa Kondo (Speech Commun., 2008)

Voice activity detection based on adjustable linear prediction and GARCH models. - Hiroko Kato Solvang; Kentaro Ishizuka; Masakiyo Fujimoto (Speech Commun., 2008)

A speaker diarization method based on the probabilistic fusion of audio-visual location information. - Kentaro Ishizuka; Shoko Araki; Kazuhiro Otsuka; Tomohiro Nakatani; Masakiyo Fujimoto (ICMI, 2009)

Realtime meeting analysis and 3D meeting viewer based on omnidirectional multimodal sensors. - Kazuhiro Otsuka; Shoko Araki; Dan Mikami; Kentaro Ishizuka; Masakiyo Fujimoto; Junji Yamato (ICMI, 2009)

A study of mutual front-end processing method based on statistical model for noise robust speech recognition. - Masakiyo Fujimoto; Kentaro Ishizuka; Tomohiro Nakatani (INTERSPEECH, 2009)

Noise robust voice activity detection based on periodic to aperiodic component ratio. - Kentaro Ishizuka; Tomohiro Nakatani; Masakiyo Fujimoto; Noboru Miyazaki (Speech Commun., 2010)

Speech Activity Detection for Multi-Party Conversation Analyses Based on Likelihood Ratio Test on Spatial Magnitude. - Kentaro Ishizuka; Shoko Araki; Tatsuya Kawahara (IEEE Trans. Speech Audio Process., 2010)