Apparatus and method for error concealment in low-delay unified speech and audio coding

US9384739B2 · kind B2 · utility

Assignees

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

Inventors

• Jérémie Lecomte · Santa Clara, US
• Martin Dietz · Nuremberg, DE
• Michael Schnabel · Lauffen am Neckar, DE
• Ralph Sperschneider · Erlangen, DE

Key dates

• Filing date: Aug 14, 2013
• Grant date: Jul 5, 2016
• Expiry date: Jun 26, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L25/06
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating spectral replacement values for an audio signal has a buffer unit for storing previous spectral values relating to a previously received error-free audio frame. Moreover, the apparatus includes a concealment frame generator for generating the spectral replacement values, when a current audio frame has not been received or is erroneous. The previously received error-free audio frame has filter information, the filter information having associated a filter stability value indicating a stability of a prediction filter. The concealment frame generator is adapted to generate the spectral replacement values based on the previous spectral values and based on the filter stability value.