Audio encoder, audio decoder and related methods using two-channel processing within an intelligent gap filling framework

US11735192B2 · 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: Jan 14, 2022
• Grant date: Aug 22, 2023
• Expiry date: Jan 14, 2042

Classification

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

Abstract

An apparatus for generating a decoded two-channel signal, comprising: a parametric decoder for providing parametric data for a second set of second spectral portions and a two-channel identification identifying for a second spectral portion of the second set of second spectral portions either a first two-channel representation for the second spectral portion of the second set of second spectral portions or a second two-channel representation for the second spectral portion of the second set of second spectral portions, the second two-channel representation being different from the first two-channel representation; and a frequency regenerator for regenerating the second spectral portion of the second set of second spectral portions depending on a first spectral portion of a first set of first spectral portions, the parametric data for the second spectral portion of the second set of second spectral portions and the two-channel identification for the second spectral portion of the second set of second spectral portions to acquire a regenerated second spectral portion of the second set of second spectral portions.