Patent ID: 6667433
Filing Date: 2003-12-23
Classification: G10H,G10L

Abstract:
A method for synthesizing music and/or speech sound signals using sinusoidal modeling, comprising the steps of:measuring frequency and phase values at frame boundries t=ti and t=ti+1 (0&lE;i&lE;N) for N data frames of interval length T of a sampled signal; modeling phase and frequency functions for the ith data frame using a quadratic phase model &thgr;i(&tgr;)=ai+bi&tgr;+ci&tgr;2, &ohgr;i(&tgr;)=bi+2ci&tgr;, where &tgr;=tâˆ’tI; determining polynomial coefficients ai, bi, Ci assuming unwrapped phase and frequency are continuous at frame boundries, and determining unknowns by minimizing a square error function; and synthesizing said music and/or speech sound signals fron said model and coefficients.