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A Multimicrophone Voice Activity Detection System Based on Mutual Information

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In many applications, such as hands-free telephony and smart environments, there is a need to distinguish voice from background noise and reverberation. A proposed system computes an information-theoretic coherency between multiple microphones in order to detect near-field speech. The system performance was compared to that of a reference case in both simulations and experiments. While all such systems degrade with increasing noise and reverberation, the proposed system proved to be more robust under adverse conditions.

JAES Volume 57 Issue 11 pp. 937-950; November 2009
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