Concept for Combined Reduction of Acoustic Echo and Coding Noise in Digital Cellular Networks

Konferenz: Sprachkommunikation 2006 - ITG-Fachtagung
26.04.2006 - 28.04.2006 in Kiel, Germany

Tagungsband: Sprachkommunikation 2006

Seiten: 4Sprache: EnglischTyp: PDF

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Enzner, Gerald; Krüger, Hauke; Vary, Peter (Institut für Nachrichtengeräte und Datenverarbeitung, RWTH Aachen, 52056 Aachen, Germany)

Acoustic echo cancelers in base stations of cellular networks suffer from the unpredictability of the effective echo path. A main reason of this unpredictability is the quantization in speech encoders. In order to resolve this problem, we suggest a design of network acoustic echo controllers on the basis of a statistical echo path model. In contrast to earlier work, we consider an optimization criterion which aims at the combined reduction of acoustic echo and coding noise.