Cross-correlation functions with binary signal involving phase information for speech enhancement

Abstract

In this paper, adding phase information to the cross-correlation function between speech signal and its binary signal, we propose a speech enhancement method in noisy environments. Methods to connect the auto-correlation function periodically or utilize exponentiated amplitude spectrum are known as a correlation function based approach for speech enhancement. In the conventional methods, spectral square distortion occurs. In the proposed method, by using the binary signal to calculate the cross-correlation function, it is possible to mitigate the influence of spectral square distortion. Experimental results show that the proposed method effectively works especially in non-stationary noise environments.