Patent ID: 7305339

Claim:
A method for estimating high-order Mel Frequency Cepstral Coefficients, the method comprising: a) in an MFCC vector of length N having L low-order coefficients (LOC), initializing any of N−L high-order coefficients (HOC) of said MFCC vector to a predetermined value, thereby forming a candidate MFCC vector; b) synthesizing a speech signal frame from said candidate MFCC vector and a pitch value using a harmonic model of voiced speech for parametric representation of said speech frame; c) computing an N-dimensional MFCC vector from said synthesized frame, thereby producing an output MFCC vector; d) performing said steps b)-c) up to a predetermined number of additional iterations, wherein the HOC of said output MFCC vector of a given iteration is appended to said LOC to form a new candidate MFCC vector for the next iteration; and e) estimating for each of a plurality of iterations of steps b)-c) any of the parameters of said model from said candidate MFCC vector and said pitch value for said iteration.