Patent ID: 8358796

Claim:
A method for a noise reduction of a binaural microphone system, comprising: generating a left microphone signal by inputting a source signal and a first interfering signal to a left microphone of the binaural microphone system; generating a right microphone signal by inputting the source signal and a second interfering signal to a right microphone of the binaural microphone system; filtering the left and the right microphone signals by a Wiener filter to obtain binaural output signals of the source signal, wherein the Wiener filter is calculated as: H W ⁡ ( Ω ) = 1 - S y ⁢ ⁢ 1 , y ⁢ ⁢ 1 ⁡ ( Ω ) S v ⁢ ⁢ 1 , v ⁢ ⁢ 1 ⁡ ( Ω ) + S v ⁢ ⁢ 2 , v ⁢ ⁢ 2 ⁡ ( Ω ) , wherein: H W (Ω) is the Wiener filter, S y1,y1 (Ω) is an auto power spectral density of a sum of the first and the second interfering signals, S v1,v1 (Ω) is an auto power spectral density of a filtered left microphone signal, S v2,v2 (Ω) is an auto power spectral density of a filtered right microphone signal; inputting the left and the right microphone signals to a Blind Source Separation Filter; and approximating the sum of the first and the second interfering signals by an output of the Blind Source Separation Filter.