DOI: 10.17586/2226-1494-2019-19-1-180-183


STUDY OF MVDR DUAL-MICROPHONE ALGORITHM FOR SPEECH ENHANCEMENT IN COHERENT NOISE PRESENCE

M. B. Stolbov, T.The Quan


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For citation: Stolbov M.B., T.The Quan. Study of MVDR dual-microphone algorithm for speech enhancement in coherent noise presence. Scientific and Technical Journal of Information Technologies, Mechanics and Optics , 2019, vol. 19, no. 1, pp. 180–183 (in Russian). doi: 10.17586/2226-1494-2019-19-1-180-183

Abstract

Subject of research. This paper considers a dual-channel algorithm implementation, namely, Minimum Variance Distortionless Response (MVDR), for speech enhancement in the presence of coherence noise using dual-microphone arrays. Methods. The study was performed using analytical models and recordings in an anechoic chamber. Main results. It is shown that the MVDR algorithm can be represented as a combination of a differential algorithm with an adaptive null steering adjustment in the directions of the coherent noise sources and an equalizer that equalizes the spatial-frequency response in the direction of the target source. Practical relevance. The advantage of the MVDR algorithm is automatic null steering in the directions of noise sources. The results are applicable in the design of systems with a large number of microphones.


Keywords: dual-microphone arrays, MVDR algorithm, coherent noise reduction

Acknowledgements. This work was partially financially supported by the Government of the Russian Federation (Grant 618278) and by the initial funding from the ITMO University.

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