An adaptive MAP speech spectral amplitude estimator combined with a zero phase noise suppressor

We previously proposed an efficient MAP (Maximum a posteriori) speech spectral amplitude estimator for stationary noise suppression. Although this method can strongly reduce stationary noise signals, it cannot reduce impulsive noise signals, such that a thunder, clap, and other impact noise signals. On the other hand, we also previously proposed a zero phase noise suppression method to achieve impulsive noise reduction, where its effectiveness was confirmed through some simulations. In this paper, we combine these two effective noise reduction methods and achieve a noise suppressor which can remove both of stationary and impulsive noise signals. We evaluate its noise reduction capability for some types of noise. The simulation results show the effectiveness of the proposed noise suppression method.