Audio decoder, audio object encoder, method for decoding a multi-audio-object signal, multi-audio-object encoding method, and non-transitory computer-readable medium therefor

US8280744B2 · kind B2 · utility

Assignee

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

Inventors

• Oliver Hellmuth · Erlangen, DE
• Johannes Hilpert · Nuremberg, DE
• Leonid Terentiev · Erlangen, DE
• Cornelia Falch · Rum, AT
• Andreas Hoelzer · Erlangen, DE
• Juergen Herre · Erlangen, DE

Key dates

• Filing date: Oct 17, 2008
• Grant date: Oct 2, 2012
• Expiry date: Nov 29, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/07
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An audio decoder for decoding a multi-audio-object signal having an audio signal of a first type and an audio signal of a second type encoded therein is described, the multi-audio-object signal having a downmix signal and side information, the side information having level information of the audio signals of the first and second types in a first predetermined time/frequency resolution, and a residual signal specifying residual level values in a second predetermined time/frequency resolution, the audio decoder having a processor for computing prediction coefficients based on the level information; and an up-mixer for up-mixing the downmix signal based on the prediction coefficients and the residual signal to obtain a first up-mix audio signal approximating the audio signal of the first type and/or a second up-mix audio signal approximating the audio signal of the second type.