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

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Multi-Constraint GSC A Modified Constraints Set Derivation Noise & Interfernce Replace the ATFs by an equivalent orthonormal basis Q. Relax the dereverberation requirements using RTFs: [ ] (h d 11 ) ∗ . . . (h d T N ˜g d 1 } {{ )∗ 0 . . . 0 } } {{ } ⇒ ˜h d N−N j h d j /hj1 d N d d The modified Constraints Set ˜C [ ˜H d Q ] (estimation by applying subspace methods) LCMV output ∑N d y = + noise components hj1s d j d j=1 S. Gannot (BIU) Multi-Microphone Speech Enhancement IWAENC 2012 20 / 53
Single Desired Speaker Directional Noise Field Multi-Constraint GSC Experimental Study (a) Noisy at mic. #1 (b) Enhanced signal Figure: Female (desired) and male (interference) with Directional noise. 8 microphones recorded at BIU acoustic lab set to T 60 = 300ms. S. Gannot (BIU) Multi-Microphone Speech Enhancement IWAENC 2012 21 / 53
Page 1 and 2: Multi-Microphone Speech Enhancement
Page 3 and 4: Introduction Room Acoustics Essenti
Page 5 and 6: Problem Formulation Problem Formula
Page 7 and 8: 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: The Constraints Set Multi-Constrain
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

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