HMM-Based Voice Conversion Using Quantized F0 Context. - Takashi Nose; Yuhei Ota; Takao Kobayashi (IEICE Trans. Inf. Syst., 2010)

Optimal control of linear systems with stochastic parameters for variance suppression. - Kenji Fujimoto; Yuhei Ota; Makishi Nakayama (CDC/ECC, 2011)