DETECTION OF FRICATIVES IN SPEECH SIGNALS

摘要

The detection of fricative in a noisy speech signal including a clean speech signal and a noisy signal is performed by band-pass filtering the noisy speech signal using a first transfer function having a first passband range to obtain a first filtered noise. And providing a second filtered noisy speech signal by band-pass filtering the noisy speech signal using a second transfer function having a second passband range, The second passband is different from the first passband. Detecting fricatives includes applying a maximum operation to the first filtered noisy speech signal and the second filtered noisy speech signal to provide a maximum spectrum representing the frequency range of the maximum fricative energy, and the maximum spectrum. On the basis of, determining whether the fricative is included in the noisy speech signal and providing a decision signal indicative of the determination.