Interaural coherence preservation in multi-channel wiener filtering-based noise reduction for binaural hearing aids

摘要: Besides noise reduction an important objective of binaural speech enhancement algorithms is the preservation cues all sound sources. To this end, extension multi-channel Wiener filter (MWF), namely MWF-ITF, has been proposed, which aims to preserve Interaural Transfer Function (ITF) However, MWF-ITF well-suited only for directional sources but not for, e.g., spatially isotropic noise, whose spatial characteristics cannot be properly described by ITF rather Coherence (IC). Hence, another MWF, MWF-IC, recently IC component. Since MWF-IC a substantial tradeoff between and exists, in paper we propose perceptually constrained version where amount controlled based on discrimination ability human auditory system. In addition, theoretical analysis cue capabilities MWF fields provided. Several simulations diffuse scenarios show that yields controllable without significantly degrading output SNR compared MWF-ITF. Furthermore, contrary proposed algorithm retains separation components while component are slightly distorted, such hearing advantage intelligibility can still exploited.