	US 12,236,963 B2
	Layered coding for compressed sound or sound field representations
Sven Kordon, Wunstorf (DE); and Alexander Krueger, Burgdorf (DE)
Assigned to DOLBY INTERNATIONAL AB, Dublin (IE)
Filed by DOLBY INTERNATIONAL AB, Dublin (IE)
Filed on Mar. 15, 2024, as Appl. No. 18/606,908.
Application 16/938,024 is a division of application No. 16/695,741, filed on Nov. 26, 2019, abandoned.
Application 16/695,741 is a division of application No. 15/763,820, granted, now 10,529,343, issued on Jan. 7, 2020, previously published as PCT/EP2016/073969, filed on Oct. 7, 2016.
Application 18/606,908 is a continuation of application No. 18/182,883, filed on Mar. 13, 2023, granted, now 11,948,587.
Application 18/182,883 is a continuation of application No. 17/561,262, filed on Dec. 23, 2021, granted, now 11,626,119, issued on Apr. 11, 2023.
Application 17/561,262 is a continuation of application No. 16/938,024, filed on Jul. 24, 2020, granted, now 11,232,801, issued on Jan. 25, 2022.
Claims priority of provisional application 62/361,461, filed on Jul. 12, 2016.
Claims priority of provisional application 62/361,416, filed on Jul. 12, 2016.
Claims priority of application No. 15306589 (EP), filed on Oct. 8, 2015; and application No. 15306653 (EP), filed on Oct. 15, 2015.
Prior Publication US 2024/0296850 A1, Sep. 5, 2024
Int. Cl. G10L 19/008 (2013.01); H04S 3/00 (2006.01)

CPC G10L 19/008 (2013.01) [H04S 3/008 (2013.01); H04S 2420/11 (2013.01)]

3 Claims

1. A method of decoding a compressed Higher Order Ambisonics (HOA) sound representation of a sound or sound field that is encoded in a plurality of hierarchical layers using layered encoding, the method comprising:

receiving a bit stream containing a frame packet;

demultiplexing from the frame packet the compressed HOA representation corresponding to the plurality of hierarchical layers that include a base layer and at least an enhancement layer, wherein at least one of the plurality of hierarchical layers includes components of a basic compressed sound representation of the sound or sound field, the components corresponding to a plurality of monaural signals;

determining that no coefficient sequences of the original HOA representation are contained in a basic compressed sound representation of the base layer and, based on this determination, determining that dependent basic side information for each vector-based signal consists of all the vector components and has its greatest size; and

decoding the compressed HOA representation based on the dependent basic side information, basic side information that is associated with the base layer, and enhancement side information that is associated with the enhancement layer, wherein the basic side information indicates that at least an individual monaural signal represents a directional signal with a direction of incidence, and wherein the enhancement side information includes information that allows prediction of missing portions of the sound or sound field.