Post-filtering Techniques

Authors: K.U. Simmer, J. Bitzer, C. Marro
Abstract: In the context of microphone arrays, the term post-filtering denotes the post-processing of the array output by a single-channel noise suppression filter. A theoretical analysis shows that Wiener post-filtering of the output of an optimum distortionless beamformer provides a minimum mean squared error solution. We examine published methods for post-filter estimation and develop a new algorithm. A simulation system is presented to compare the performance of the discussed algorithms.
Document type: Chapter in Book
in Book: Microphone Arrays
Publication: Springer, Berlin, Heidelberg, New York, May 2001
Pages: 39-57
Index: 119
Files: BibTEX
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