Blind Matched Filtering for Speech Recording in Uncorrelated Noise

Abstract:
This work presents a matched filter design for multichannel microphone systems, where the noise signals are uncorrelated, but the noise power spectral densities can vary. The filter design requires no knowledge about the room impulse responses. It utilizes only estimates of the input signal to noise ratios and the noise power densities. Furthermore, it is shown that the proposed filter structure can be utilized for blind identification of the acoustic transfer functions. Index Terms — matched filter, multichannel speech enhancement, blind system identification