Decoder and method for a generalized spatial-audio-object-coding parametric concept for multichannel downmix/upmix cases by comparing a downmix channel matrix eigenvalues to a threshold

US10096325B2 · kind B2 · utility

Assignee

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

Inventors

• Leon Terentiv · Erlangen, DE
• Oliver Hellmuth · Erlangen, DE
• Juergen Herre · Erlangen, DE
• Thorsten Kastner · Kronach, DE

Key dates

• Filing date: Jan 28, 2015
• Grant date: Oct 9, 2018
• Expiry date: Jan 28, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S1/002
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A decoder for generating an audio output signal having one or more audio output channels from a downmix signal having one or more downmix channels is provided. The downmix signal encodes one or more audio object signals. The decoder has a threshold determiner for determining a threshold value depending on a signal energy and/or a noise energy of at least one of the of or more audio object signals and/or depending on a signal energy and/or a noise energy of at least one of the one or more downmix channels. Moreover, the decoder has a processing unit for generating the one or more audio output channels from the one or more downmix channels depending on the threshold value, by computing eigenvalues of a downmix channel cross correlation matrix, wherein each eigenvalue except largest eigenvalue is compared to the threshold value, and omitted if they are smaller.