Authors: |
V. Mildner, S. Goetze, K.-D. Kammeyer |
Abstract: |
Multi-channel systems containing a Delay&Sum-Beamformer have been previously combined with post-filters to achieve higher speech enhancement in noisy conditions. Problems occurring in the lower frequency regions were compensated by applying a Wiener weighting rule or spectral subtraction. We extend this by referring to the log-STSA rule of Ephraim-Malah. Furthermore, we introduce a psychoacustically motivated postfilter based on the one presented by Gustafsson for single-channel systems. Relying on Li's subband approach we derive an algorithm which exploits the advantage of multi-channel systems in order to estimate those quantities necessary for computing the psychoacoustic weighting rule. |
Document type: |
Conference Paper |
Publication: |
Kiel, Germany, 26. - 28. April 2006 |
Conference: |
ITG-Fachtagung Sprachkommunikation 2006 |
Index: |
268 |
Files: |
BibTEX
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