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On spectral estimation of residual echo in hands-free telephony

Authors:
Gerald Enzner, Rainer Martin, and Peter Vary
Book Title:
Proceedings of International Workshop on Acoustic Echo and Noise Control (IWAENC)
Venue:
Darmstadt, Germany
Date:
Sept. 2001
Language:
English

Abstract

We present and compare residual echo power spectral estimation techniques. Residual echo arises in hands-free telephony equipment due to insufficient echo cancellation performance. The residual echo power spectral density is very important to control combined residual echo and noise postfiltering. Eventually, we introduce a new partitioned block-adaptive estimation technique delivering considerably improved estimates in reverberant and noisy double talk environments.

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