PROCESSING SPEECH SIGNALS

摘要

A method of processing a speech signal in noise, comprising: determining a frequency spectrum of a frame of the speech signal; determining a value of the pitch of the frame of the speech signal; identifying peakes (12, 14, 16, 22, 28, 32) in the spectrum; and evaluating the peaks individually to determine respective scores for the peaks, the score for a peak being a measure of the likelihood that the peak is a harmonic band of teh speech signal. As a consequence there is: (a) no need for high f0 accuracy as there is no need to predict long sequences of harmonic positions; and (b) no need for an assumption of harmonic integrity at all points.