Patent ID: 11948584
Assignee: DOLBY INTERNATIONAL AB
Field: nan (nan)
Classification: CPC nan | IPC G  H

Claim 3:
4. An apparatus for decoding a compressed Higher Order Ambisonics (HOA) representation of a sound or sound field, the apparatus comprising:
a receiver for 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; and

a processor for 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
a decoder for 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.