US 12,236,962 B2
Methods and apparatus for decoding a compressed HOA signal
Sven Kordon, Wunstorf (DE); Alexander Krueger, Burgdorf (DE); and Oliver Wuebbolt, Hanover (DE)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed on Sep. 11, 2023, as Appl. No. 18/464,505.
Application 16/892,154 is a division of application No. 16/186,765, filed on Nov. 12, 2018, granted, now 10,679,634, issued on Jun. 9, 2020.
Application 16/186,765 is a division of application No. 15/127,545, granted, now 10,127,914, issued on Nov. 13, 2018, previously published as PCT/EP2015/055916, filed on Mar. 20, 2015.
Application 18/464,505 is a continuation of application No. 17/957,199, filed on Sep. 30, 2022, granted, now 11,830,504.
Application 17/957,199 is a continuation of application No. 16/892,154, filed on Jun. 3, 2020, granted, now 11,462,222, issued on Oct. 4, 2022.
Claims priority of application No. 14305412 (EP), filed on Mar. 21, 2014.
Prior Publication US 2023/0419975 A1, Dec. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 17/00 (2019.01); G10L 19/008 (2013.01); G10L 19/24 (2013.01); H04S 3/00 (2006.01)
CPC G10L 19/008 (2013.01) [G10L 19/24 (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 of decoding a compressed Higher Order Ambisonics (HOA) representation of a sound or sound field, the method comprising:
receiving a bit stream containing the compressed HOA representation and an indication that there are multiple layers;
determining, during channel reassignment, indices of coefficient sequences that are active in a frame; and
decoding, based on the indication that there are multiple layers, the compressed HOA representation from a bitstream to obtain a sequence of decoded HOA representations, wherein the decoding is based on the indices of coefficient sequences that are active in the frame; wherein a first subset of the sequence of decoded HOA representations is determined based only on corresponding ambient HOA components, and wherein the multiple layers include a base layer and at least an enhancement layer.