Patent ID: 11948583
Assignee: DOLBY LABORATORIES LICENSING CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. A system for decoding an ambisonics audio soundfield representation for playback, the ambisonics audio soundfield representation having an order N, the apparatus comprising:
a receiver for receiving the audio soundfield representation;
a processor for receiving a decode matrix for decoding the audio soundfield representation to determine a decoded audio signal,
wherein the decode matrix is based on a matrix containing panning functions for a first plurality of L loudspeaker positions and a second plurality of S source directions, wherein the size of the matrix is L×S, wherein the plurality of S source directions are distributed over a unit sphere, wherein each direction of the plurality of S source directions includes a corresponding azimuth angle and a corresponding inclination angle, and wherein S>=(N+1){circumflex over ( )}2, and wherein the panning functions are indicated by gain values; and

a decoder for determining the decoded audio signal based on a multiplication of the decode matrix and the audio soundfield representation.