Method for Connecting Speech Synthesis Units
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-27
This article describes a method for connecting speech synthesis units that generates synthesis parameters for naturally co-articulated phonemes. (Image Omitted) Background Spectral features of phonemes in natural speech change under the influence of their phonetic environments. Such spectral fluctuation of phonemes has been one obstacle to synthesizing high quality speech successfully in rule synthesis systems. Most of former rule-systhesis methods were not successful in synthesizing, what is called co-articulated phonemes mainly because fixed speech synthesis units were used. A fixed extracted environment, connecting such units with a simple smoothing like linear interpolation, is not sufficient for generating appropriate co-articulations in various phonetic environments.