US 12,425,791 B2
Method and apparatus for compressing and decompressing a higher order ambisonics representation for a sound field
Alexander Krueger, Burgdorf (DE); Sven Kordon, Wunstorf (DE); and Johannes Boehm, Göttingen (DE)
Assigned to DOLBY LABORATORIES LICENSING CORPORATION, San Francisco, CA (US)
Filed by DOLBY LABORATORIES LICENSING CORPORATION, San Francisco, CA (US)
Filed on Dec. 19, 2022, as Appl. No. 18/068,096.
Application 16/828,961 is a division of application No. 16/276,363, filed on Feb. 14, 2019, granted, now 10,609,501, issued on Mar. 30, 2020.
Application 16/276,363 is a division of application No. 16/019,256, filed on Jun. 26, 2018, granted, now 10,257,635, issued on Apr. 9, 2019.
Application 16/019,256 is a division of application No. 15/435,175, filed on Feb. 16, 2017, granted, now 10,038,965, issued on Jul. 31, 2018.
Application 18/068,096 is a continuation of application No. 17/532,246, filed on Nov. 22, 2021, granted, now 11,546,712.
Application 17/532,246 is a continuation of application No. 16/828,961, filed on Mar. 25, 2020, granted, now 11,184,730, issued on Nov. 23, 2021.
Application 15/435,175 is a continuation of application No. 14/651,313, granted, now 9,646,618, issued on May 9, 2017, previously published as PCT/EP2013/075559, filed on Dec. 4, 2013.
Claims priority of application No. 12306569 (EP), filed on Dec. 12, 2012.
Prior Publication US 2023/0179940 A1, Jun. 8, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04S 7/00 (2006.01); G10L 19/008 (2013.01); H04S 3/00 (2006.01)
CPC H04S 7/302 (2013.01) [G10L 19/008 (2013.01); H04S 3/008 (2013.01); H04S 2400/01 (2013.01); H04S 2420/11 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for decompressing a compressed Higher Order Ambisonics (HOA) representation, the method comprising:
perceptually decoding the compressed HOA representation to determine decompressed dominant directional signals and decompressed time domain signals representing residual HOA component in a spatial domain, wherein the decompressed time domain signals correspond to a reduced order residual HOA component;
determining predicted directional signals based on the decompressed dominant directional signals, wherein the predicted directional signals are determined based on a smoothing using a windowing function;
determining a decompressed residual HOA component based on the decompressed time domain signals, wherein the decompressed HOA component is based on extending an order of the reduced order residual HOA component, and wherein the extending comprises appending zero values to the reduced order residual HOA component;
determining an HOA sound field representation based on the predicted directional signals and the decompressed residual HOA component; and
outputting the HOA sound field representation for rendering to loudspeaker feeds.