Methods, apparatus and systems for a pre-rendered signal for audio rendering

US11540079B2 · kind B2 · utility

Assignee

• Dolby International AB · IE

Inventors

• Leon Terentiv · Erlangen, DE
• Christof Fersch · Dresden, DE
• Daniel Fischer · Furth, DE

Key dates

• Filing date: Apr 8, 2019
• Grant date: Dec 27, 2022
• Expiry date: Apr 8, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2400/15
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The present disclosure relates to a method of decoding audio scene content from a bitstream by a decoder that includes an audio renderer with one or more rendering tools. The method comprises receiving the bitstream, decoding a description of an audio scene from the bitstream, determining one or more effective audio elements from the description of the audio scene, determining effective audio element information indicative of effective audio element positions of the one or more effective audio elements from the description of the audio scene, decoding a rendering mode indication from the bitstream, wherein the rendering mode indication is indicative of whether the one or more effective audio elements represent a sound field obtained from pre-rendered audio elements and should be rendered using a predetermined rendering mode, and in response to the rendering mode indication indicating that the one or more effective audio elements represent the sound field obtained from pre-rendered audio elements and should be rendered using the predetermined rendering mode, rendering the one or more effective audio elements using the predetermined rendering mode, wherein rendering the one or more e…