Patent ID: 7565288
Filing Date: 2009-07-21
Classification: G10L

Abstract:
1. A method of reducing noise, the method comprising: obtaining a captured signal with a microphone array, wherein the captured signal comprises a desired signal and noise, wherein the microphone array comprises at least three microphones, and wherein each microphone has a known position and a known directivity pattern; determining spatial information based on phase differences of non-repetitive pairs of signals from the at least three microphones, wherein the spatial information is obtained from signals of at least two combinations of the at least three microphones, wherein the spatial information comprises an at least two-dimensional space, and wherein each physical point from a real space has a corresponding point in the at least two-dimensional space; and computing an estimate of the desired signal based on an a priori spatial signal-to-noise ratio and an a posteriori spatial signal-to-noise ratio, wherein the a priori spatial signal-to-noise ratio and the a posteriori spatial signal-to-noise ratio are each based on the spatial information.