Publications-Detail

Generalized Filter-Bank Equalizer for Noise Reduction with Reduced Signal Delay

Authors:
Löllmann, H. W.Vary, P.
Book Title:
Proceedings of European Conference on Speech Communication and Technology (INTERSPEECH)
Organization:
ISCA
Address:
Lisbon, Portugal
Date:
Sep. 2005
Language:
English

Abstract

An efficient realization of a low delay filter-bank, termed as generalized filter-bank equalizer (FBE), will be proposed for noise reduction with low signal delay. The FBE is equivalent to a time-domain filter with coefficients adapted in the frequency-domain.
This filter-bank structure ensures perfect signal reconstruction for a variety of spectral transforms with less restrictions than for an analysis-synthesis filter-bank (AS FB). A non-uniform frequency resolution can be achieved by an allpass transformation. In this case, the FBE has not only a lower signal delay than the AS FB, but also a lower algorithmic complexity for most parameter configurations. Another advantage of the FBE is the lower number of required delay elements (memory) compared to the AS FB. The noise reduction achieved by means of the AS FB and the FBE is approximately equal.

Download

BibTeX

Copyright © by IKS
loellmann05b.pdf
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.