US 12,483,849 B2
Rendering of audio objects with a complex shape
Tommy Falk, Spånga (SE); and Werner De Bruijn, Stockholm (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/910,990
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 10, 2021, PCT No. PCT/EP2021/056112
§ 371(c)(1), (2) Date Sep. 12, 2022,
PCT Pub. No. WO2021/180820, PCT Pub. Date Sep. 16, 2021.
Claims priority of provisional application 62/988,983, filed on Mar. 13, 2020.
Prior Publication US 2023/0132745 A1, May 4, 2023
Int. Cl. H04S 7/00 (2006.01); G06T 19/00 (2011.01)
CPC H04S 7/302 (2013.01) [G06T 19/006 (2013.01); H04S 2400/11 (2013.01); H04S 2420/01 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for representing an audio object with respect to a listening position of a listener in an extended reality scene, the method comprising:
obtaining first metadata describing a first three-dimensional (3D) shape associated with the audio object; and
transforming the obtained first metadata, which describes the first 3D shape associated with the audio object, to produce transformed metadata describing a two-dimensional (2D) plane or a one-dimensional (1D) line, wherein
the 2D plane or the 1D line represent at least a portion of the audio object,
transforming the obtained first metadata to produce the transformed metadata comprises determining an anchor point, the anchor point being a point on the 3D shape that is deemed closest to the listening position of the listener in the extended reality scene,
the 2D plane or 1D lines passes through the anchor point,
transforming the obtained first metadata to produce the transformed metadata further comprises:
determining a first point on the first 3D shape that represents a first edge of the first 3D shape with respect to the listening position of the listener,
determining a second point on the first 3D shape that represents a second edge of the first 3D shape with respect to the listening position of the listener, and
determining a first property of the 2D plane or 1D line based on the first and second points, and
the method further comprises:
prior to determining the first point on the first 3D shape and the second point on the first 3D shape, determining a line between the listening position of the listener and the anchor point; and
using the determined line to determine the first point on the first 3D shape and the second point on the first 3D shape, wherein
the first point on the first 3D shape has a highest azimuth angle relative to the line between the listening position of the listener and the anchor point, and
the second point on the first 3D shape has a lowest azimuth angle relative to the line between the listening position of the listener and the anchor point.