Apparatuses for converting an object position of an audio object, audio stream provider, audio content production system, audio playback apparatus, methods and computer programs

US11653162B2 · kind B2 · utility

Assignee

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

Inventors

• Oliver WÜBBOLT · Hannover, DE
• Achim Kuntz · Hemhofen, DE
• Christian Ertel · Eckental, DE
• Sascha Dick · Nuremberg, DE
• Frederik Nagel · Nuremberg, DE
• Matthias Neusinger · Meiningen, DE

Key dates

• Filing date: Jul 30, 2020
• Grant date: May 16, 2023
• Expiry date: Jul 30, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2400/11
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus for converting an object position of an audio object from a Cartesian representation to a spherical representation is described. A basis area of the Cartesian representation is subdivided into a plurality of basis area triangles, and wherein a plurality of spherical-domain triangles are inscribed into a circle of a spherical representation. The apparatus is configured to determine, in which of the basis area triangles a projection of the object position of the audio object into the base area is arranged; and the apparatus is configured to determine a mapped position of the projection of the object position using a linear transform, which maps the base area triangle onto its associated spherical domain triangle. The apparatus is configured to derive an azimuth angle and an intermediate radius value from the mapped position. The apparatus is configured to obtain a spherical domain radius value and an elevation angle in dependence on the intermediate radius value and in dependence on a distance of the object position from the base area. An apparatus for converting an object position of an audio object from a spherical representation to a spherical representation, applicat…