Low bitrate audio encoding/decoding scheme having cascaded switches

US10319384B2 · kind B2 · utility

Assignee

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

Inventors

• Bernhard Grill · Lautenbächle, DE
• Roch Lefebvre · Magog, CA
• Bruno Bessette · Sherbrooke, CA
• Jimmy Lapierre · Orford, CA
• Philippe Gournay · Sherbrooke, CA
• Redwan Salami · Delta, CA
• Stefan Bayer · Nuremberg, DE
• Guillaume Fuchs · Erlangen, DE
• Stefan Geyersberger · Erlangen, DE
• Ralf Geiger · Erlangen, DE
• Johannes Hilpert · Nuremberg, DE
• Ulrich Kraemer · Stuttgart, DE
• Jérémie Lecomte · Santa Clara, US
• Markus Multrus · Nuremberg, DE
• Max Neuendorf · Nuremberg, DE
• Harald Popp · Tuchenbach, DE
• Nikolaus Rettelbach · Nuremberg, DE

Key dates

• Filing date: Dec 22, 2014
• Grant date: Jun 11, 2019
• Expiry date: Dec 22, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L2019/0008
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An audio encoder has a first information sink oriented encoding branch, a second information source or SNR oriented encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch has a converter into a specific domain different from the spectral domain, and wherein the second encoding branch furthermore has a specific domain coding branch, and a specific spectral domain coding branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder has a first domain decoder, a second domain decoder for decoding a signal, and a third domain decoder and two cascaded switches for switching between the decoders.