Audio codec supporting time-domain and frequency-domain coding modes

US9037457B2 · kind B2 · utility

Assignee

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

Inventors

• Ralf Geiger · Erlangen, DE
• Konstantin Schmidt · Nuremberg, DE
• Bernhard Grill · Lautenbächle, DE
• Manfred Lutzky · Nuremberg, DE
• Michael Werner · Marloffstein, DE
• Marc Gayer · Erlangen, DE
• Johannes Hilpert · Nuremberg, DE
• Maria Luis Valero · Nuremberg, DE
• Wolfgang Jaegers · Erlangen, DE

Key dates

• Filing date: Aug 13, 2013
• Grant date: May 19, 2015
• Expiry date: Aug 13, 2033

Classification

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

Abstract

An audio codec supporting both, time-domain and frequency-domain coding modes, having low-delay and an increased coding efficiency in terms of iterate/distortion ratio, is obtained by configuring the audio encoder such that same operates in different operating modes such that if the active operative mode is a first operating mode, a mode dependent set of available frame coding modes is disjoined to a first subset of time-domain coding modes, and overlaps with a second subset of frequency-domain coding modes, whereas if the active operating mode is a second operating mode, the mode dependent set of available frame coding modes overlaps with both subsets, i.e. the subset of time-domain coding modes as well as the subset of frequency-domain coding modes.