Patent ID: 8290189

Claim:
A method for noise reduction of a binaural microphone signal (x 1 , x 2 ) with one target point source and M interfering point sources (n 1 , n 2 , . . . , n M ) as input sources to a left and a right microphone of a binaural microphone system, the method comprising the following step: filtering a left and a right microphone signal (x 1 , x 2 ) by a Wiener filter to obtain binaural output signals (Å L ,Å R ) of the target point source, where the Wiener filter is calculated as: H W = â¢ 1 - Î¦ ( x 1 , n + x 2 , n ) â¢ ( x 1 , n + x 2 , n ) Î¦ ( x 1 + x 2 ) â¢ ( x 1 + x 2 ) , where H W is the Wiener filter, Î¦ (x 1,n +x 2,n )(x 1,n +x 2,n ) is an auto power spectral density of a sum of all of the M interfering point sources components (x 1,n , x 2,n ) contained in the left and right microphone signals (x 1 , x 2 ) and Î¦ (x 1 +x 2 )(x 1 +x 2 ) is an auto power spectral density of a sum of left and right microphone signals (x 1 , x 2 ).