Patent · US Active

Acoustic echo suppression unit and conferencing front-end

US8873764B2 · kind B2 · utility

4Cited by

2References

5Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Fabian Kuech · Erlangen, DE
Markus Kallinger · Erlangen, DE
Markus Schmidt · Seibersbach, DE
Meray Zourub · Erlangen, DE
Marco Diatschuk · Weisendorf, DE
Oliver Moser · Erlangen, DE

Key dates

Filing date	Oct 13, 2011
Grant date	Oct 28, 2014
Priority date	—
Expiry date	Sep 20, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2420/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An acoustic echo suppression unit according to an embodiment of the present invention includes and input interface for extracting a downmix signal from an input signal, the input signal including the downmix signal and parametric side information, wherein the downmix and the parametric side information together represent a multichannel signal, a calculator for calculating filter coefficients for an adaptive filter, wherein the calculator is adapted to determine the filter coefficients based on the downmix signal and a microphone signal or a signal derived from the microphone signal, and an adaptive filter adapted to filter the microphone signal or the signal derived from the microphone signal based on the filter coefficients to suppress an echo caused by the multichannel signal in the microphone signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.