Apparatus and method for multi-channel parameter transformation

US8687829B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• Dolby Sweden AB · SE
• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Johannes Hilpert · Nuremberg, DE
• Karsten Linzmeier · Nuremberg, DE
• Juergen Herre · Erlangen, DE
• Ralph Sperschneider · Erlangen, DE
• Andreas Hoelzer · Erlangen, DE
• Lars Villemoes · Stockholm, SE
• Jonas Engdegard · Stockholm, SE
• Heiko Purnhagen · Sundbyberg, SE
• Kristofer Kjoerling · Solna, SE
• Dirk Jeroen Breebaart · Eindhoven, NL
• Werner Oomen · Eindhoven, NL

Key dates

• Filing date: Oct 5, 2007
• Grant date: Apr 1, 2014
• Expiry date: Nov 29, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/03
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A parameter transformer generates level parameters, indicating an energy relation between a first and a second audio channel of a multi-channel audio signal associated to a multi-channel loudspeaker configuration. The level parameter are generated based on object parameters for a plurality of audio objects associated to a down-mix channel, which is generated using object audio signals associated to the audio objects. The object parameters have an energy parameter indicating an energy of the object audio signal. To derive the coherence and the level parameters, a parameter generator is used, which combines the energy parameter and object rendering parameters, which depend on a desired rendering configuration.