Apparatus and method for encoding and decoding an encoded audio signal using temporal noise/patch shaping

US11049506B2 · kind B2 · utility

Assignee

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

Inventors

• Sascha Disch · Bad Mergentheim, DE
• Frederik Nagel · Nuremberg, DE
• Ralf Geiger · Erlangen, DE
• Balaji Nagendran Thoshkahna · Erlangen, DE
• Konstantin Schmidt · Nuremberg, DE
• Stefan Bayer · Nuremberg, DE
• Christian Neukam · Kalchreuth, DE
• Bernd Edler · Hannover, DE
• Christian Helmrich · Erlangen, DE

Key dates

• Filing date: May 20, 2019
• Grant date: Jun 29, 2021
• Expiry date: May 20, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/02
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for decoding an encoded audio signal, includes: a spectral domain audio decoder for generating a first decoded representation of a first set of first spectral portions being spectral prediction residual values; a frequency regenerator for generating a reconstructed second spectral portion using a first spectral portion of the first set of first spectral portions, wherein the reconstructed second spectral portion additionally includes spectral prediction residual values; and an inverse prediction filter for performing an inverse prediction over frequency using the spectral residual values for the first set of first spectral portions and the reconstructed second spectral portion using prediction filter information included in the encoded audio signal.