Binaural rendering of a multi-channel audio signal

US8325929B2 · kind B2 · utility

Assignees

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

Inventors

• Jeroen Koppens · Weert, NL
• Harald Mundt · Fürth, DE
• Leonid Terentiev · Erlangen, DE
• Cornelia Falch · Rum, AT
• Johannes Hilpert · Nuremberg, DE
• Oliver Hellmuth · Erlangen, DE
• Lars Villemoes · Stockholm, SE
• Jan Plogsties · Ergolding, DE
• Jeroen Breebaart · Eindhoven, NL
• Jonas Engdegard · Stockholm, SE

Key dates

• Filing date: Apr 6, 2011
• Grant date: Dec 4, 2012
• Expiry date: Apr 14, 2031

Classification

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

Abstract

Binaural rendering a multi-channel audio signal into a binaural output signal is described. The multi-channel audio signal has a stereo downmix signal into which a plurality of audio signals are downmixed, and side information having a downmix information, as well as object level information of the plurality of audio signals and inter-object cross correlation information. Based on a first rendering prescription, a preliminary binaural signal is computed from the first and second channels of the stereo downmix signal. A decorrelated signal is generated as an perceptual equivalent to a mono downmix of the first and second channels of the stereo downmix signal being, however, decorrelated to the mono downmix. Depending on a second rendering prescription, a corrective binaural signal is computed from the decorrelated signal and the preliminary binaural signal is mixed with the corrective binaural signal to obtain the binaural output signal.