Design of co-processor for real-time HMM-based text-to-speech on hardware system applied to Vietnamese. - Trong-Thuc Hoang; Hong-Kiet Su; Hieu-Binh Nguyen; Duc-Hung Le; Huu-Thuan Huynh; Trong-Tu Bui; Cong-Kha Pham (IEICE Electron. Express, 2015)