Audio encoder for encoding a multichannel signal and audio decoder for decoding an encoded audio signal

US10388287B2 · kind B2 · utility

Assignee

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

Inventors

• Sascha Disch · Bad Mergentheim, DE
• Guillaume Fuchs · Erlangen, DE
• Emmanuel Ravelli · Erlangen, DE
• Christian Neukam · Kalchreuth, DE
• Konstantin Schmidt · Nuremberg, DE
• Conrad Benndorf · Erlangen, DE
• Andreas Niedermeier · Munich, DE
• Benjamin Schubert · Nuremberg, DE
• Ralf Geiger · Erlangen, DE

Key dates

• Filing date: Sep 5, 2017
• Grant date: Aug 20, 2019
• Expiry date: Sep 6, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L21/038
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Audio encoder for encoding a multichannel signal is shown. The audio encoder includes a downmixer for downmixing the multichannel signal to obtain a downmix signal, a linear prediction domain core encoder for encoding the downmix signal, wherein the downmix signal has a low band and a high band, wherein the linear prediction domain core encoder is configured to apply a bandwidth extension processing for parametrically encoding the high band, a filterbank for generating a spectral representation of the multichannel signal, and a joint multichannel encoder configured to process the spectral representation including the low band and the high band of the multichannel signal to generate multichannel information.