Apparatus, method and computer program for encoding, decoding, scene processing and other procedures related to DirAC based spatial audio coding using diffuse compensation

US12418768B2 · kind B2 · utility

Assignee

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

Inventors

• Guillaume Fuchs · Erlangen, DE
• Oliver Thiergart · Forchheim, DE
• Srikanth KORSE · Erlangen, DE
• Stefan DÖHLA · Erlangen, DE
• Markus Multrus · Nuremberg, DE
• Fabian KÜCH · Erlangen, DE
• Alexandre BOUTHÉON · Erlangen, DE
• Andrea EICHENSEER · Erlangen, DE
• Stefan Bayer · Nuremberg, DE

Key dates

• Filing date: Aug 2, 2023
• Grant date: Sep 16, 2025
• Expiry date: Aug 2, 2043

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/13
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus generating a sound field description includes an input signal analyzer acquiring diffuseness data from the input signal; a sound component generator for generating, from the input signal, one or more sound field components of a first group of sound field components comprising for each sound field component a direct component and a diffuse component, and for generating, from the input signal, a second group of sound field components comprising only a direct component. The sound component generator is configured to perform an energy compensation when generating the first group of sound field components, the energy compensation depending on the diffuseness data and at least one of a number of sound field components in the second group, a number of diffuse components in the first group, a maximum order of sound field components of the first group and a maximum order of sound field components of the second group.