Low bitrate audio encoding/decoding scheme with common preprocessing

US8804970B2 · kind B2 · utility

Assignee

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

Inventors

• Bernhard Grill · Lautenbächle, DE
• 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
• Frederik Nagel · Nuremberg, DE
• Sascha Disch · Bad Mergentheim, DE
• Juergen Herre · Erlangen, DE
• Yoshikazu Yokotani · Erlangen, DE
• Stefan Wabnik · Ilmenau, DE
• Gerald Schuller · Erfurt, DE
• Jens Hirschfeld · Heringen, DE

Key dates

• Filing date: Jan 11, 2011
• Grant date: Aug 12, 2014
• Expiry date: Jul 3, 2032

Classification

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

Abstract

An audio encoder has a common preprocessing stage, an information sink based encoding branch such as spectral domain encoding branch, a information source based encoding branch such as an LPC-domain encoding branch and a switch for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage. An audio decoder has a spectral domain decoding branch, an LPC-domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.