Patent ID: 9048942
Filing Date: 2015-06-02
Classification: H04B,H04R

Abstract:
1. A method for reducing interference in an audio signal in a form of a microphone signal acquired by an array of microphones from a source, comprising the steps of: determining an estimate of a target signal by beam-forming the microphone signal in a direction of the source; determining a set of estimates of interference by using a microphone array filtering matrix to block the target signal in the microphone signal; optimizing a set of filters by minimizing an objective function measuring a mismatch between the set of estimates of interference, determined by the estimates of interference determining step, and the estimate of the target signal, wherein the minimizing uses a sparse regularization of coefficients of the set of filters; filtering the set of estimates of interference using the set of filters after the optimizing; and subtracting the set of estimates of interference, filtered by the filtering step, after the optimizing from the target signal, wherein the steps are performed in a processor.