Noise robustness in speaker independent speech recognition. - Shuji Morii; Toshiyuki Morii; Masakatsu Hoshimi; Shoji Hiraoka; Taisuke Watanabe; Katsuyuki Niyada (ICSLP, 1990)

Dispersed-pulse codebook and its application to a 4 kb/s speech coder. - Kazutoshi Yasunaga; Hiroyuki Ehara; Koji Yoshida; Toshiyuki Morii (ICASSP, 2000)

Design of a Robust LSP Quantizer for a High-Quality 4-kbit/s CELP Speech Coder. - Yusuke Hiwasaki; Kazunori Mano; Kazutoshi Yasunaga; Toshiyuki Morii; Hiroyuki Ehara; Takao Kaneko (IEICE Trans. Inf. Syst., 2004)

Predictive VQ for Bandwidth Scalable LSP Quantization. - Hiroyuki Ehara; Toshiyuki Morii; Masahiro Oshikiri; Koji Yoshida (ICASSP (1), 2005)

Design of bandwidth scalable LSF quantization using interframe and intraframe prediction. - Hiroyuki Ehara; Toshiyuki Morii; Masahiro Oshikiri; Koji Yoshida; Kouichi Honma (INTERSPEECH, 2005)

An 8-32 kbit/s scalable wideband coder extended with MDCT-based bandwidth extension on top of a 6.8 kbit/s narrowband CELP coder. - Masahiro Oshikiri; Hiroyuki Ehara; Toshiyuki Morii; Tomofumi Yamanashi; Kaoru Satoh; Koji Yoshida (INTERSPEECH, 2007)

Predictive vector quantization of wideband LSF using narrowband LSF for bandwidth scalable coders. - Hiroyuki Ehara; Toshiyuki Morii; Koji Yoshida (Speech Commun., 2007)