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Unbiased Residual Echo Power Estimation for Hands-Free Telephony

Authors:

Gerald Enzner, Rainer Martin, and Peter Vary

Book Title:

Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

Venue:

Orlando, Florida, USA

Date:

May 2002

Pages:

1893–1896

Language:

English

Abstract

Residual echo arises in hands-free telephony equipment due to insufficient echo canceler convergence, but can be suppressed using a postfilter. The most important control parameter for postfilter adaptation is therefore the residual echo power spectral density (PSD). In this contribution we present and compare residual echo PSD estimation techniques. We introduce a new partitioned lock-adaptive estimator delivering unbiased residual echo PSD estimates in strongly reverberant and noisy acoustic environments

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