Jackson Walker L.L.P.
Wind noise reduction with beamforming
A device for wind noise reduction and spatial noise reduction comprises a first microphone for capturing a nominal speech signal, and a second microphone for capturing a nominal noise signal. The device has a generalized sidelobe canceller for spatial noise reduction, comprising a blocking matrix filter configured to adaptively process the nominal speech signal to produce a speech cancellation signal, a first subtraction node for subtracting the speech cancellation signal from the nominal noise signal to produce a noise reference signal, a noise cancellation filter configured to adaptively filter the noise reference signal to produce a noise cancellation signal, and a second subtraction node for subtracting the noise cancellation signal from the nominal speech signal to produce a speech reference signal. The device has a wind noise reduction module for wind noise reduction, the wind noise reduction module comprising at least one filter derived from the blocking matrix filter of the generalized sidelobe canceller.
Cirrus Logic, Inc.
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Hu
Chen