IP Library › Granted Patent US 12,315,523
Granted Patent B2
US 12,315,523 · App. 18/584,290 · Granted May 27, 2025

Multichannel audio encode and decode using directional metadata

Inventor: David McGrath (Rose Bay, AU)
Assignee: Dolby Laboratories Licensing Corporation
G10L19/008
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Quick Facts
Patent No.
US 12,315,523
App. No.
18/584,290
Granted
May 27, 2025
Kind
B2
Abstract

Spatial audio signals are processed to generate a compressed representation of the spatial audio signal. Methods include analyzing the spatial audio signal to determine directions of arrival for one or more audio elements; for at least one frequency subband, determining respective indications of signal power associated with the directions of arrival; generating metadata including direction information that includes indications of the directions of arrival of the audio elements, and energy information that includes respective indications of signal power; generating a channel-based audio signal with a predefined number of channels based on the spatial audio signal; and outputting, as the compressed representation, the channel-based audio signal and the metadata. The compressed representation of a spatial audio signal can be further processed to generate a reconstructed representation of the spatial audio signal.

Claims (6)

1. A method of processing a spatial audio signal for generating a compressed representation of the spatial audio signal, the method comprising:

analyzing the spatial audio signal to determine directions of arrival for one or more audio elements in an audio scene represented by the spatial audio signal, wherein analyzing the spatial audio signal is based on a plurality of frequency subbands of the spatial audio signal;

for at least one frequency subband of the spatial audio signal, determining respective indications of signal power associated with the determined directions of arrival;

generating metadata comprising direction information and energy information, with the direction information comprising indications of the determined directions of arrival of the one or more audio elements and the energy information comprising respective indications of signal power associated with the determined directions of arrival;

generating a channel-based audio signal with a predefined number of channels based on the spatial audio signal; and

outputting, as the compressed representation of the spatial audio signal, the channel-based audio signal and the metadata.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 21, 2024
From: MCGRATH, DAVID S.
To: DOLBY LABORATORIES LICENSING CORPORATION
Reel/Frame 067480/0146 →
Continuity (4)
Continuation 17771877
Provisional Application 63086465 · Oct 1, 2020
Provisional Application 62927790 · Oct 30, 2019
Related Publication 20240282321A1 · Aug 22, 2024
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