Multi-Microphone Speech Enhancement - =1=Using LCMV ...

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Problem Formulation Talk Outline Spatial processors (“beamformers”) based on the linearly constrained minimum variance (LCMV) criterion. Special cases: Enhancing single desired source (MVDR). Extracting desired source(s) in multiple competing speaker environment. Implementation: Generalized sidelobe canceller (GSC) in the short-time Fourier transform (STFT) domain. The relative transfer function (RTF): importance and estimation procedures. The applicability of the LCMV to binaural processing. S. Gannot (BIU) Multi-Microphone Speech Enhancement IWAENC 2012 6 / 53
Problem Formulation Problem Formulation in the STFT Domain Microphone Signals (m = 1, . . . , M): N d ∑ z m (l, k) = sj d (l, k)hjm(l, d k) N i Vector Formulation j=1 ∑ ∑N n + sj i (l, k)hjm(l, i k) + sj n (l, k)hjm(k) n + n m (l, k) j=1 j=1 z(l, k) = H d (l, k)s d (l, k) + H i (k)s i (l, k) + H n (l, k)s n (l, k) + n(l, k) } {{ } v(l,k); stationary component N = N d + N i + N n ≤ M S. Gannot (BIU) Multi-Microphone Speech Enhancement IWAENC 2012 7 / 53
Page 1 and 2: Multi-Microphone Speech Enhancement
Page 3 and 4: Introduction Room Acoustics Essenti
Page 5: Problem Formulation Problem Formula
Page 9 and 10: LCMV Beamformer Criterion and Solut
Page 11 and 12: LCMV Beamformer The GSC Implementat
Page 13 and 14: MVDR Criterion, Solution, GSC The M
Page 15 and 16: The Transfer Function GSC Relative
Page 17 and 18: The Transfer Function GSC RTF Estim
Page 19 and 20: The Constraints Set Multi-Constrain
Page 21 and 22: Single Desired Speaker Directional
Page 23 and 24: Binaural LCMV Binaural LCMV Beamfor
Page 25 and 26: Double LCMV Criterion Binaural LCMV
Page 27 and 28: Binaural LCMV ISR vs. ITF ISR vs. I
Page 29 and 30: Binaural LCMV Experimental Study So
Page 31 and 32: Binaural LCMV Experimental Study IL
Page 33 and 34: Vielen dank ! Acoustic Lab S. Ganno
Page 35 and 36: The Transfer Function GSC RTF Estim
Page 37 and 38: CTF vs. MTF Motivation The Convolut
Page 39 and 40: CTF vs. MTF Simulation Results Expe
Page 41 and 42: CTF vs. MTF Known RTF, Input SNR=0d
Page 43 and 44: Summary CTF vs. MTF Simulation Resu
Page 45 and 46: Multi-Constraint GSC Interferences
Page 47 and 48: Multi-Constraint GSC Parameter Esti
Page 49 and 50: Multi-Constraint GSC Parameter Esti
Page 51 and 52: QRD Pruning Graphical Interpretatio
Page 53: Setup Binaural LCMV Experimental St

Multi-Microphone Speech Enhancement - =1=Using LCMV ...

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