Apparatus, method or computer program for generating a sound field description

US11272305B2 · kind B2 · utility

Assignee

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

Inventors

• Emanuel Habets · Spardorf, DE
• Oliver Thiergart · Forchheim, DE
• Fabian KÜCH · Erlangen, DE
• Alexander NIEDERLEITNER · Nürnberg, DE
• Affan Khan · Exton, US
• Dirk Mahne · Nuremberg, DE

Key dates

• Filing date: May 13, 2020
• Grant date: Mar 8, 2022
• Expiry date: May 13, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/11
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating a sound field description having a representation of sound field components, including a direction determiner for determining one or more sound directions for each time-frequency tile of a plurality of time-frequency tiles of a plurality of microphone signals; a spatial basis function evaluator for evaluating, for each time-frequency tile of the plurality of time-frequency tiles, one or more spatial basis functions using the one or more sound directions; and a sound field component calculator for calculating, for each time-frequency tile of the plurality of time-frequency tiles, one or more sound field components corresponding to the one or more spatial basis functions evaluated using the one or more sound directions and a reference signal for a corresponding time-frequency tile, the reference signal being derived from one or more microphone signals of the plurality of microphone signals.