A Phonological Control Method on A Speech Compensation System for Dysarthria Using A Standardized Space

摘要

We have developed a speech compensation system for dysarthria. The system aims at improving the phonological properties of vowels without losing speaker individuality. We propose a method for phonological control of vowels using a standardized space to control vowels in the normalized articulation space, normalized for speaker individuality. The method maps an original dysarthric speaker's normalized articulation space to a standardized space, then from the standardized space to the target speaker's normalized articulation space assuming normality to improve the phonological properties of vowels. We confirm phonological control of vowels by performing a processing simulation, comparison different target speakers and a processing simulation using a dummy original speaker as a dysarthria.