Stereophonic Noise Reduction by a Combined Non-recursive Multi-stage Sliding Subspace Projection and Adaptive Signal Enhancement

This paper proposes a novel broad-band noise reduction technique in stereophonic situations. The method utilises a combined non-recursive multi-stage sliding subspace projection and adaptive signal enhancement. Simulation results based upon real stereophonic speech contaminated by broad-band noise components show that the proposed method yields a performance improvement in the speech enhancement quality evaluated by both the cepstral distance and segmental gain in SNR objective measurements, as well as by listening, in comparison with the conventional nonlinear spectral subtraction approach.