Apparatus for providing an upmix signal representation on the basis of a downmix signal representation, apparatus for providing a bitstream representing a multi-channel audio signal, methods, computer program and bitstream using a distortion control signaling

US9060236B2 · kind B2 · utility

Assignees

• Dolby International AB · IE
• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Jonas Engdegard · Stockholm, SE
• Heiko Purnhagen · Sundbyberg, SE
• Juergen Herre · Erlangen, DE
• Leon Terentiv · Erlangen, DE
• Cornelia Falch · Rum, AT
• Oliver Hellmuth · Erlangen, DE

Key dates

• Filing date: Apr 18, 2012
• Grant date: Jun 16, 2015
• Expiry date: Mar 23, 2033

Classification

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

Abstract

An apparatus for providing an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information, which are included in a bitstream representation of an audio content, and in dependence on a rendering information, has a distortion limiter configured to adjust upmix parameters using a distortion control scheme to avoid or limit audible distortions which are caused by an inappropriate choice of rendering parameters. The distortion limiter is configured to obtain a distortion limitation control parameter, which is included in the bitstream representation of the audio content, and to adjust a distortion control scheme in dependence on the distortion limitation control parameter.