WIND NOISE REDUCTION

摘要

A method of wind noise reduction. Left side and right side microphone signals are obtained. In a first stage wind noise reduction is applied to a first sub-band of one of the signals, below a spectral threshold NA. In a second stage the wind noise reduced first side signal, and the second side signal, are both split into a sub-band below a threshold NB less than NA. The sub-band of the first side signal is mixed with the sub-band of the second side signal to produce an aggregate third sub-band signal having reduced wind noise, which is recombined with the respective sub-bands above the threshold NB to produce output first and second side signals.

主权项

1. A method of wind noise reduction, the method comprising:
deriving from a plurality of microphones at least one first side input signal and at least one second side input signal, the first and second sides each being one of a left side and a right side; in a first stage:
splitting the first side signal into a first sub-band below a spectral threshold NA and a second sub-band above the spectral threshold NA;applying wind noise reduction to the first sub-band of the first signal to produce a wind noise reduced first sub-band of the first signal; andrecombining the wind noise reduced first sub-band of the first signal with the second sub-band of the first signal, to produce a wind noise reduced first side signal; in a second stage:
splitting the wind noise reduced first side signal into a third sub-band below a spectral threshold NB and a fourth sub-band above the spectral threshold NB;splitting the second side signal into a third sub-band below the spectral threshold NB and a fourth sub-band above the spectral threshold NB;mixing the third sub-band of the first side signal with the third sub-band of the second side signal to produce an aggregate third sub-band signal having reduced wind noise;combining the aggregate third sub-band signal with the fourth sub-band of the first side signal to produce an output first side signal; andcombining the aggregate third sub-band signal with the fourth sub-band of the second side signal to produce an output second side signal, and wherein NB is less than NA.