Multi-Microphone Speech Enhancement - =1=Using LCMV ...
Multi-Microphone Speech Enhancement - =1=Using LCMV ...
Multi-Microphone Speech Enhancement - =1=Using LCMV ...
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<strong>Multi</strong>-Constraint GSC<br />
Interferences Subspace Estimation<br />
Step 1<br />
Parameter Estimation<br />
EVD and Pruning<br />
Estimate the signals<br />
subspace at each time<br />
segment without any<br />
desired sources active<br />
ˆΦ i zz = ¯Q i Λ i ¯Q H i<br />
All eigenvectors<br />
corresponding to “weak”<br />
eigenvalues are discarded<br />
dB<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
−10<br />
−20<br />
−30<br />
Eigen values per frequency<br />
100 200 300 400 500 600 700 800 900 1000<br />
Frequency index<br />
S. Gannot (BIU) <strong>Multi</strong>-<strong>Microphone</strong> <strong>Speech</strong> <strong>Enhancement</strong> IWAENC 2012 45 / 53
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