Audio decoder, audio encoder, method for decoding an audio signal, method for encoding an audio signal, computer program and audio signal

US8494865B2 · kind B2 · utility

Assignee

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

Inventors

• Guillaume Fuchs · Erlangen, DE
• Markus Multrus · Nuremberg, DE
• Ralf Geiger · Erlangen, DE
• Arne Borsum · Erlangen, DE
• Frederik Nagel · Nuremberg, DE
• Julien Robilliard · Nuremberg, DE
• Vignesh Subbaraman · Erlangen, DE
• Jérémie Lecomte · Santa Clara, US

Key dates

• Filing date: Apr 6, 2011
• Grant date: Jul 23, 2013
• Expiry date: Apr 6, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L25/18
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An audio decoder for providing a decoded audio information on the basis of an entropy encoded audio information includes a context-based entropy decoder configured to decode the entropy-encoded audio information in dependence on a context, which context is based on a previously-decoded audio information in a non-reset state-of-operation. The context-based entropy decoder is configured to select a mapping information, for deriving the decoded audio information from the encoded audio information, in dependence on the context. The context-based entropy decoder includes a context resetter configured to reset the context for selecting the mapping information to a default context, which default context is independent from the previously-decoded audio information, in response to a side information of the encoded audio information.