US 12,283,279 B2
Method and device for decoding an audio soundfield representation
Johann-Markus Batke, Hannover (DE); Florian Keiler, Hannover (DE); and Johannes Boehm, Goettingen (DE)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed on Mar. 15, 2024, as Appl. No. 18/607,321.
Application 17/560,223 is a division of application No. 16/852,459, filed on Apr. 18, 2020, granted, now 11,217,258, issued on Jan. 4, 2022.
Application 16/852,459 is a division of application No. 16/189,768, filed on Nov. 13, 2018, granted, now 10,629,211, issued on Apr. 21, 2020.
Application 16/189,768 is a division of application No. 16/019,233, filed on Jun. 26, 2018, granted, now 10,134,405, issued on Nov. 20, 2018.
Application 16/019,233 is a division of application No. 15/681,793, filed on Aug. 21, 2017, granted, now 10,037,762, issued on Jul. 31, 2018.
Application 18/607,321 is a continuation of application No. 17/560,223, filed on Dec. 22, 2021, granted, now 11,948,583.
Application 15/681,793 is a continuation of application No. 15/245,061, filed on Aug. 23, 2016, granted, now 9,767,813, issued on Sep. 19, 2017.
Application 15/245,061 is a continuation of application No. 14/750,115, filed on Jun. 25, 2015, granted, now 9,460,726, issued on Oct. 4, 2016.
Application 14/750,115 is a continuation of application No. 13/634,859, granted, now 9,100,768, issued on Aug. 4, 2015, previously published as PCT/EP2011/054644, filed on Mar. 25, 2011.
Claims priority of application No. 10305316 (EP), filed on Mar. 26, 2010.
Prior Publication US 2024/0304195 A1, Sep. 12, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/00 (2013.01); G10L 19/008 (2013.01); H04S 3/02 (2006.01); H04S 7/00 (2006.01)
CPC G10L 19/008 (2013.01) [H04S 3/02 (2013.01); H04S 7/308 (2013.01); H04S 2400/13 (2013.01); H04S 2420/11 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for decoding an ambisonics audio soundfield representation for playback, the ambisonics audio soundfield representation having an order N, the method comprising:
receiving, by a processor configured to decode the audio soundfield representation, the audio soundfield representation;
receiving, by the processor, a decode matrix for decoding the audio soundfield representation to determine a decoded audio signal,
wherein the decode matrix is based on a mode matrix that was determined based on source directions and an order of the ambisonics audio soundfield representation;
wherein the decode matrix is further based on a second matrix containing panning functions for a first plurality of L loudspeaker positions and a second plurality of source directions, wherein a size of the second 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) 2, and wherein the panning functions are indicated by gain values; and
determining the decoded audio signal based on a multiplication of the decode matrix and the audio soundfield representation.