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

US10777208B2 · 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: Mar 22, 2019
• Grant date: Sep 15, 2020
• Expiry date: Mar 22, 2039

Classification

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

Abstract

A schematic block diagram of an audio encoder for encoding a multichannel audio signal is shown. The audio encoder includes a linear prediction domain encoder, a frequency domain encoder, and a controller for switching between the linear prediction domain encoder and the frequency domain encoder. The controller is configured such that a portion of the multichannel signal is represented either by an encoded frame of the linear prediction domain encoder or by an encoded frame of the frequency domain encoder. The linear prediction domain encoder includes a downmixer for downmixing the multichannel signal to obtain a downmixed signal. The linear prediction domain encoder further includes a linear prediction domain core encoder for encoding the downmix signal and furthermore, the linear prediction domain encoder includes a first joint multichannel encoder for generating first multichannel information from the multichannel signal.