Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Marco Diatschuk

Ralf Geiger

Markus Schnell

Manfred Lutzky

Fabian Kuech

Fabian Küch

Markus Schmidt

Markus Kallinger

Oliver Moser

Meray Zourub

An apparatus for level estimation of an encoded audio signal is provided. The apparatus has a codebook determinator for determining a codebook from a plurality of codebooks as an identified codebook. The audio signal has been encoded by employing the identified codebook. Moreover, the apparatus has an estimation unit configured for deriving a level value associated with the identified codebook as a derived level value and for estimating a level estimate of the audio signal using the derived level value.

Apparatus and method for codebook level estimation of coded audio frames in a bit stream domain to determine a codebook from a plurality of codebooks

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.

Acoustic echo suppression unit and conferencing front-end

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Weisendorf, Germany

Marco Diatschuk