Combined Nonlinear Echo Cancellation and Residual Echo Suppression

Konferenz: Speech Communication - 11. ITG-Fachtagung Sprachkommunikation
24.09.2014 - 26.09.2014 in Erlangen, Deutschland

Tagungsband: Speech Communication

Seiten: 4Sprache: EnglischTyp: PDF

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Autoren:
Schwarz, Andreas; Hofmann, Christian; Kellermann, Walter (Multimedia Communications and Signal Processing, Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Erlangen, Germany)

Inhalt:
We describe a combined nonlinear acoustic echo cancellation and residual echo suppression system. The echo canceler uses parallel Hammerstein branches consisting of fixed nonlinear basis functions and linear adaptive filters. The residual echo suppressor uses an Artificial Neural Network for modeling of the residual echo spectrum from spectral features computed from the far-end signal. We show that modeling nonlinear effects both in the echo canceler and in the echo suppressor leads to an increased performance of the combined system.