Spatial interference suppression using dual-microphone arrays

摘要

Systems, processes, devices, apparatuses, algorithms and computer readable medium for suppressing spatial interference using a dual microphone array for receiving, from a first microphone and a second microphone that are separated by a predefined distance, and that are configured to receive source signals, respective first and second microphone signals based on received source signals. A phase difference between the first and the second microphone signals is calculated based on the predefined distance. An angular distance between directions of arrival of the source signals and a desired capture direction is calculated based on the phase difference. Directional-filter coefficients are calculated based on the angular distance. Undesired source signals are filtered from an output based on the directional-filter coefficients.

主权项

1. A controller comprising:
an interface configured to receive signals from a first microphone and a second microphone; a signal processor configured to:
calculate a phase difference between a first signal from a first microphone and a second signal from a second microphone, given a distance between the first microphone and the second microphone,calculate directional-filter coefficients based on the phase difference,obtain a plurality of directional-filter coefficients,identify a subset of robust subband directional-filter coefficients from the plurality of directional-filter coefficients,calculate a gain using an average of the subset of robust subband directional-filter coefficients, andapply the gain to the plurality of directional-filter coefficients; and a memory configured to store the gain to the plurality of directional-filter coefficients.