Low-complexity tonality-adaptive audio signal quantization

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United States of America Patent

PATENT NO 11694701
APP PUB NO 20210366499A1
SERIAL NO

17396526

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Abstract

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The invention provides an audio encoder for encoding an audio signal so as to produce therefrom an encoded signal, the audio encoder including: a framing device configured to extract frames from the audio signal; a quantizer configured to map spectral lines of a spectrum signal derived from the frame of the audio signal to quantization indices, wherein the quantizer has a dead-zone, in which the input spectral lines are mapped to quantization index zero; and a control device configured to modify the dead-zone; wherein the control device includes a tonality calculating device configured to calculate at least one tonality indicating value for at least one spectrum line or for at least one group of spectral lines, wherein the control device is configured to modify the dead-zone for the at least one spectrum line or the at least one group of spectrum lines depending on the respective tonality indicating value.

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Patent Owner(s)

Patent OwnerAddress
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E VHANSASTRASSE 27C MUENCHEN 80686

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dietz, Martin Nuremberg, DE 105 1158
Fuchs, Guillaume Bubenrath, DE 236 3361
Helmrich, Christian Erlangen, DE 154 944
Markovic, Goran Nuremberg, DE 80 383

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