Patent ID: 6662153
Filing Date: 2003-12-09
Classification: G10L

Abstract:
A time-separated speech coder for coding the transitional signal of voiced/unvoiced sound through harmonic speech coding, the time-separated speech coder comprises:an excitation signal transitional analyzer analyzing means which comprises: a transitional point detecting means for detecting a transitional point to notify the transitional analyzer of said transitional signal; a harmonic excitation signal analyzing means including window means for extracting harmonic model parameter of each block by applying a Time Warp Hamming (TWH) window to a central point of each left/right block after dividing a Linear Prediction Coefficient (LPC) residual signal which is one of the inputted signals within the transitional analyzer centering said detected transitional point; and a harmonic excitation signal synthesizing means for adding said harmonic model parameter.