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Low Delay Filter for Adaptive Noise Reduction

Authors:

Heinrich W. Löllmann and Peter Vary

Book Title:

Proceedings of International Workshop on Acoustic Echo and Noise Control (IWAENC)

Venue:

Eindhoven, The Netherlands

Organization:

Technische Universiteit Eindhoven

Date:

Sept. 2005

Pages:

205–208

Language:

English

Abstract

A filter structure is proposed which has a significantly lower signal delay than common frequency-domain filtering by means of an analysis-synthesis filter-bank (AS FB). The recently published filter-bank equalizer (FBE) is a filter(-bank) with a lower signal delay compared to the corresponding AS FB. In this contribution, the signal delay of the FBE is further reduced by approximating the time-domain filter of the FBE by a filter of lower degree. The proposed low delay filter (LDF) achieves a higher amount of noise reduction than an AS FB or FBE with the same signal delay.

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