Patent ID: 6044342
Filing Date: 2000-03-28
Classification: G10L

Abstract:
A speech spurt detecting apparatus for detecting speech spurts in a voice signal, said speech spurt detecting apparatus comprising:a storage for storing an input voice signal;a decision portion for making a decision of speech spurt sections and mute sections from the input voice signal using a threshold value;a mute level statistical processor for estimating noise distribution of a signal in the mute sections by statistically processing the mute sections decided by the decision portion;a speech spurt detecting threshold value decision portion for obtaining an average and a variance of the noise distribution from said mute level statistical processor and for approximating the noise distribution to a gamma distribution in accordance with said average and said variance to decide a speech spurt detecting threshold value in such a way that the possibility of erroneously detecting noise as a speech signal is lowered; anda speech spurt transmitting portion for outputting the voice signal in the speech spurt sections from the storage.