Apparatus and method for audio signal envelope encoding, processing, and decoding by splitting the audio signal envelope employing distribution quantization and coding

US10115406B2 · kind B2 · utility

Assignee

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

Inventors

• Tom Baeckstroem · Nuremberg, DE
• Benjamin Schubert · Nuremberg, DE
• Markus Multrus · Nuremberg, DE
• Sascha Disch · Bad Mergentheim, DE
• Konstantin Schmidt · Nuremberg, DE
• Grzegorz Pietrzyk · Nuremberg, DE

Key dates

• Filing date: Dec 9, 2015
• Grant date: Oct 30, 2018
• Expiry date: Dec 9, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L2019/0016
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for decoding to obtain a reconstructed audio signal envelope includes a signal envelope reconstructor for generating the reconstructed audio signal envelope depending on one or more splitting points and an output interface for outputting the reconstructed audio signal envelope. The signal envelope reconstructor is configured to generate the reconstructed audio signal envelope such that the one or more splitting points divide the reconstructed audio signal envelope into two or more audio signal envelope portions, and to generate the reconstructed audio signal envelope such that, for each of the two or more signal envelope portions, an absolute value of its signal envelope portion value is greater than half of an absolute value of the signal envelope portion value of each of the other signal envelope portions.