Audio encoder, audio decoder, methods and computer program using jointly encoded residual signals

US10741188B2 · kind B2 · utility

Assignee

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

Inventors

• Sascha Dick · Nuremberg, DE
• Christian Ertel · Eckental, DE
• Christian Helmrich · Erlangen, DE
• Johannes Hilpert · Nuremberg, DE
• Andreas Hoelzer · Erlangen, DE
• Achim Kuntz · Hemhofen, DE

Key dates

• Filing date: Apr 9, 2018
• Grant date: Aug 11, 2020
• Expiry date: Apr 9, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/03
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An audio decoder for providing at least four audio channel signals on the basis of an encoded representation is configured to provide a first residual signal and a second residual signal on the basis of a jointly encoded representation of the first residual signal and of the second residual signal using a multi-channel decoding. The audio decoder is configured to provide a first audio channel signal and a second audio channel signal on the basis of a first downmix signal and the first residual signal using a residual-signal-assisted multi-channel decoding. The audio decoder is configured to provide a third audio channel signal and a fourth audio channel signal on the basis of a second downmix signal and the second residual signal using a residual-signal-assisted multi-channel decoding. An audio encoder is based on corresponding considerations.