US 12,327,569 B2
Spatial parameter signalling
Tapani Pihlajakuja, Vantaa (FI); and Mikko-Ville Laitinen, Espoo (FI)
Assigned to NOKIA TECHNOLOGIES OY, Espoo (FI)
Appl. No. 17/270,354
Filed by NOKIA TECHNOLOGIES OY, Espoo (FI)
PCT Filed Aug. 8, 2019, PCT No. PCT/FI2019/050581
§ 371(c)(1), (2) Date Feb. 22, 2021,
PCT Pub. No. WO2020/043935, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 1814227 (GB), filed on Aug. 31, 2018.
Prior Publication US 2021/0319799 A1, Oct. 14, 2021
Int. Cl. G10L 19/02 (2013.01); G10L 19/008 (2013.01)
CPC G10L 19/0204 (2013.01) [G10L 19/008 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus of an encoder comprising at least one processor and at least one memory including a computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
obtain, via the encoder, at least one audio signal;
generate, via the encoder, at least one transport signal based on the at least one audio signal;
obtain, via the encoder, metadata for each of at least two frequency bands associated with the at least one audio signal, wherein the metadata for a respective frequency band comprises at least one parameter;
select, via the encoder, a frequency band of the at least two frequency bands based on comparing at least one further respective parameter for each of the at least two frequency bands, wherein the at least one further respective parameter is determined from each of the at least two frequency bands, and wherein selecting the frequency band of the at least two frequency bands further comprises: (i) selecting the at least one parameter for the selected frequency band of the at least two frequency bands and (ii) discarding at least part of the metadata associated with an other of the at least two frequency bands;
generate, via the encoder, an output comprising a selection of the at least one parameter associated with the selected frequency band of the at least two frequency bands and not comprising the discarded other of the at least one parameter for the at least two frequency bands, such that the selection of the at least one parameter associated with the selected frequency band is configured to reduce a bitrate or size of the output and wherein the at least one parameter of the selected frequency band is configured to represent respective parameters of the at least two frequency bands; and
at least one of store or transmit the at least one transport signal and the output comprising the selection of the at least one parameter associated with the selected frequency band of the at least two frequency bands and not comprising the discarded other of the at least one parameter for the at least two frequency bands.