Apparatus, method and computer program for encoding, decoding, scene processing and other procedures related to DirAC based spatial audio coding using low-order, mid-order and high-order components generators

US11937075B2 · 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: May 27, 2021
• Grant date: Mar 19, 2024
• Expiry date: Feb 14, 2042

Classification

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

Abstract

An apparatus for generating a sound field description using an input signal having a mono-signal or a multi-channel signal comprises: an input signal analyzer for analyzing the input signal to derive direction data and diffuseness data; a low-order components generator for generating a low-order sound field description from the input signal up to a predetermined order and mode; a mid-order components generator for generating a mid-order sound field description above the predetermined order or at the predetermined order and above the predetermined mode and below or at a first truncation order using a synthesis of at least one direct portion and of at least one diffuse portion using the direction data and the diffuseness data; and a high-order components generator for generating a high-order sound field description having a component above the first truncation order using a synthesis of at least one direct portion.