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

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Multi-Constraint GSC Parameter Estimation Desired Sources RTF Estimation For a Single Desired Source PSD Estimation Estimate spatial PSD of stationary sources (during noise-only segments). Estimate spatial PSD of one desired source + stationary sources. Largest Generalized Eigenvector f = GEVD(“Desired+Noise PSD”, “Noise PSD”). Rotate and normalize f to obtain the RTF ˆ˜h d j . Back S. Gannot (BIU) Multi-Microphone Speech Enhancement IWAENC 2012 52 / 53
Setup Binaural LCMV Experimental Study Hearing device: 2 hearing aid devices mounted on B&K HATS, with 2 microphones, 2cm inter-distance. A 9 × 5 utility device with 4 mics. at the corners, average distance 3.5cm. The device placed on a table at a distance of 0.5m. Signals: 1 desired speaker, θ d = 30 o , 1m (constrained). 1 interference speaker at θ i = −70 o , 1m (constrained). 1 directional stationary noise, θ n = −40 o , 2.5m (unconstrained). SIR=0dB, SNR=14dB. Acoustic lab: Dimensions 6 × 6 × 2.4; Controllable reverb. time T 60 = 0.3s. STFT: Sampling frequency 8kHz, 4096 points, 75% overlap. Algorithm Cue gain factors: Desired speech - η = 1. Interference speech - µ = 0.1 (20dB attenuation). Back S. Gannot (BIU) Multi-Microphone Speech Enhancement IWAENC 2012 53 / 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 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: QRD Pruning Graphical Interpretatio

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