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Reducing the Delay of an Acoustic Echo Canceller with Subband Adaptation

Authors:

Matthias Dörbecker and Peter Vary

Book Title:

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

Series:

4

Venue:

Røros, Norway

Event Date:

0.-0.6.1995

Organization:

n.n.

Date:

June 1995

Pages:

103–106

Language:

English

Abstract

In this contribution a novel structure for acoustic echo cancellation is presented. On one side the new structure takes advantage of subband adaptation, which results in high convergence speed as well as low complexity in comparison to the time domain NLMS algorithm. On the other side the key problem of subband echo cancellers, i.e. the large delay of the signal transmitted to the far-end talker, is eliminated by carrying out parts of the compensation in the time domain. Consequently, the proposed approach can be interpreted as combination between subband and time domain echo cancellers. Experimental simulations confirm the theoretical results.

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