Method for noise suppression in an adaptive beamformer

Details Method for noise suppression in an adaptive beamformer Method for noise suppression in an adaptive beamformer

2006-04-18

2006-04-18

Pendleton, Brian T. (Department: 2644)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S094100, C381S094300

Reexamination Certificate

active

07031478

ABSTRACT:
A method for noise suppression is described, wherein noisy input signals in a multiple input audio processing device are subjected to adaptations and summed and wherein the noise frequency components of the noisy input signals in the summed input signals are estimated based on individually kept noise frequency components and on said adaptations. Advantageously the method may be applied if a spectral subtraction like technique is applied in a multi input beamformer. Only one spectral frequency transformation is necessary, which reduces the number of necessary calculations.

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J. Meyer et al; “Multi-Channel Speech Enchancement in a Car Environment Using Wiener Filtering and Spectral Subtraction” 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing. Speech Processing, Munich, Apr. 21-24, 1997, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) , Los Alamitos, IEEE Comp. Soc. Press, US, vol. 2, pp. 1167-1170, XP000822660.

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