Patent ID: 7152032
Filing Date: 2006-12-19
Classification: G10L

Abstract:
1. A voice enhancement device comprising: a signal separating part which separates an input voice signal into sound source characteristics and vocal tract characteristics; a characteristic extraction part which extracts characteristic information from said vocal tract characteristics; a corrected vocal tract characteristic calculating part which determines vocal tract characteristic correction information from said vocal tract characteristics and said characteristic information; a vocal tract characteristic correction part which corrects the vocal tract characteristics using said vocal tract characteristic correction information; and signal synthesizing part for synthesizing said sound source characteristics and said corrected vocal tract characteristics from said vocal tract characteristic correction part; wherein a voice synthesized by said signal synthesizing part is output; wherein said signal separating part is a filter constructed by linear prediction (LPC) coefficients obtained by subjecting the input voice to linear prediction analysis; and wherein said linear prediction coefficients are determined from an average of self-correlation functions calculated from the input voice.