On the Speech Distortion Weighted Multichannel Wiener Filter for diffuse Noise

In this paper the multichannelWiener filter is analyzed under the constraint of a diffuse noise field. An equivalent filter function is derived that partly omits the computationally demanding and error-prone matrix inversion. This yields a reduction of the computational complexity of the algorithm. By a theoretical analysis and by simulation results the equivalence of the two filter functions is shown. The simulations were performed with real noise and speech data recorded in a car where a diffuse noise field can be assumed.