Speaker adaptive phoneme recognition by multi-level clustering based on mutual information criterion. - Katsuhiko Shirai; Naoki Hosaka; Eiichiro Kitagawa (ICASSP, 1990)

Speaker adaptable phoneme recognition selecting reliable acoustic features based on mutual information. - Katsuhiko Shirai; Naoki Hosaka; Eiichiro Kitagawa; T. Endo (ICSLP, 1990)

Optimal construction of context sensitive quantizer for phoneme recognition in continuous speech. - Katsuhiko Shirai; Eiichiro Kitagawa; T. Endo (EUROSPEECH, 1991)