A Dual-Microphone Speech Enhancement Based Coherence and Speech Presence Probability

Abstract

In this paper, the authors proposed an efficiency estimation coherence noise method for distributed microphones. It utilizes an estimation of speech presence probability for calculating coherence noise, and signal-to-noise ration. Based-Wiener filter a gain function, which derived from the achieved signal-to-noise ratio, has proven the effectiveness of suppressing background noise while save the target speech. The proposed algorithm is useful for two-channel speech enhancement systems with microphone constellations where the microphones are placed separately, and can be combined with coherence based two-microphone noise reduction systems.