Methods and systems for rendering object based audio

Patent metadata

Field	Value
Publication number	US-10553225-B2
Application number	US-201916391038-A
Country	US
Kind code	B2
Filing date	Apr 22, 2019
Priority date	Apr 3, 2013
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

Methods for generating an object based audio program, renderable in a personalizable manner, and including a bed of speaker channels renderable in the absence of selection of other program content (e.g., to provide a default full range audio experience). Other embodiments include steps of delivering, decoding, and/or rendering such a program. Rendering of content of the bed, or of a selected mix of other content of the program, may provide an immersive experience. The program may include multiple object channels (e.g., object channels indicative of user-selectable and user-configurable objects), the bed of speaker channels, and other speaker channels. Another aspect is an audio processing unit (e.g., encoder or decoder) configured to perform, or which includes a buffer memory which stores at least one frame (or other segment) of an object based audio program (or bitstream thereof) generated in accordance with, any embodiment of the method.

First claim

What is claimed is:

1. A method of rendering audio content for an audio program, wherein the program includes at least one object channel and metadata, wherein the metadata is indicative of at least one selectable predetermined mix of content including the at least one object channel, wherein the metadata includes rendering parameters for each said predetermined mix, said method including steps of:
(a) receiving the object channel and metadata of the program;
(b) providing to a controller a set of selectable predetermined mixes of audio content of the program including the predetermined mix of content, wherein the controller is configured to provide an interface relating to mixes which are available for selection, wherein the metadata includes a syntax element that indicates the interface;
(c) receiving from the controller a selection of the predetermined mixes, wherein the selection indicates a selected subset of the set of selectable predetermined mixes of audio content of the program; and
(d) rendering the at least one object channel based on at least some of the metadata that indicates the selected subset of the set of selectable predetermined mixes of audio content of the program, wherein the rendering includes selecting and mixing content of the at least one object channel in response to the at least some of the metadata that indicates the selected subset of the set of selectable predetermined mixes of audio content of the program.

2. An audio processing unit configured to render audio content for an audio program, wherein the program includes at least one object channel and metadata, wherein the metadata is indicative of at least one selectable predetermined mix of content including the at least one object channel, and the metadata includes rendering parameters for each said predetermined mix, said audio processing unit including:
a first subsystem configured to receive the object channel;
a second subsystem coupled to the first subsystem and configured to provide to a controller a set of selectable predetermined mixes of audio content of the program including the predetermined mix of content, wherein the controller is configured to provide an interface relating to mixes which are available for selection, wherein the metadata includes a syntax element that indicates the interface;
a third subsystem coupled to the second subsystem and configured to receive from the controller a selection of the predetermined mixes, wherein the selection indicates a selected subset of the set of selectable predetermined mixes of audio content of the audio program; and
a rendering subsystem, coupled to the first subsystem and the third subsystem, and configured to render the at least one object channel based on at least some of the metadata that indicates the selected subset of the set of selectable predetermined mixes of audio content of the audio program, wherein the rendering includes selecting and mixing content of the at least one object channel in response to the at least some of the metadata that indicates the selected subset of the set of selectable predetermined mixes of audio content of the audio program.

3. A non-transitory computer readable medium containing instructions that when executed by a processor perform the method of claim 1 .

Assignees

• Dolby Laboratories Licensing Corp
• Dolby Int Ab

Inventors

• Mehta Sripal S
• Ziegler Thomas
• Baker Giles
• Riedmiller Jeffrey
• Saungsomboon Prinyar

Classifications

• G10L19/008 Primary

  Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing · CPC title

• G10L19/20

  using sound class specific coding, hybrid encoders or object based coding · CPC title

• H04S3/008

  in which the audio signals are in digital form, i.e. employing more than two discrete digital channels (data reduction aspects thereof based on psychoacoustics G10L19/02) · CPC title

• H04S2400/13

  Aspects of volume control, not necessarily automatic, in stereophonic sound systems · CPC title

• H04S2420/03

  Application of parametric coding in stereophonic audio systems · CPC title