US 11,948,584 B2
Layered coding for compressed sound or sound field represententations
Sven Kordon, Wunstorf (DE); and Alexander Krueger, Burgdorf (DE)
Assigned to DOLBY INTERNATIONAL AB, Dublin (IE)
Filed by DOLBY INTERNATIONAL AB, Amsterdam (NL)
Filed on May 23, 2022, as Appl. No. 17/751,492.
Application 16/917,907 is a division of application No. 15/763,827, granted, now 10,706,860, issued on Jul. 7, 2020, previously published as PCT/EP2016/073970, filed on Oct. 7, 2016.
Application 17/751,492 is a continuation of application No. 16/917,907, filed on Jul. 1, 2020, granted, now 11,373,660.
Claims priority of provisional application 62/361,809, filed on Jul. 13, 2016.
Claims priority of application No. 15306590 (EP), filed on Oct. 8, 2015.
Prior Publication US 2022/0277753 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/00 (2013.01); G10L 19/008 (2013.01); G10L 19/24 (2013.01); H04S 7/00 (2006.01); G10L 19/16 (2013.01)
CPC G10L 19/008 (2013.01) [G10L 19/24 (2013.01); H04S 7/00 (2013.01); G10L 19/167 (2013.01); H04S 2420/11 (2013.01)] 4 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, wherein the bit stream comprises a plurality of hierarchical layers that include a base layer and two or more hierarchical enhancement layers, wherein the bit stream comprises at least a data payload corresponding to the plurality of hierarchical layers, and wherein the bit stream further comprises basic side information that is associated with the base layer and enhancement side information that is associated with the two or more hierarchical enhancement layers,
wherein the plurality of hierarchical layers have assigned thereto components of the compressed HOA representation of the sound or sound field,
wherein the two or more hierarchical enhancement layers comprises a highest usable hierarchical enhancement layer, and
wherein each of the two or more hierarchical enhancement layers include a portion of the enhancement side information including parameters for improving a basic reconstructed sound representation obtainable from data included in a respective layer and any layers lower than the respective layer;
determining that a parameter CodedVVecLength is equal to 1, and based on this determination, determining that particular components of a vector corresponding to the compressed HOA representation are implicitly set to zero; and
decoding the compressed HOA representation based on the basic side information that is associated with the base layer and based on the portion of the enhancement side information that is associated with the highest usable hierarchical enhancement layer, and not based on a second portion of the enhancement side information that is associated with any other layer of the two or more hierarchical enhancement layers.