Object Audio Coding
AssigneeApple Inc.
InventorsSina Zamani, Moo Young Kim, Dipanjan Sen, Sang Uk Ryu, Juha O. Merimaa, Symeon Delikaris Manias
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Abstract
In one aspect, a computer-implemented method, includes obtaining object audio and metadata that spatially describes the object audio, converting the object audio to Ambisonics audio based on the metadata, encoding, in a first bit stream, the Ambisonics audio, and encoding, in a second bit stream, at least a subset of the metadata. Other aspects are also described and claimed.
Claims20
A system for encoding object audio, the system comprising a processor configured to:
- obtain object audio and metadata that spatially describes the object audio, wherein the object audio and the metadata characterize an original audio scene;
- convert the object audio to Ambisonics audio based on the metadata;
- encode, in a first bit stream, the Ambisonics audio;
- encode, in a second bit stream, at least a subset of the metadata;
- and
- transmit the first bit stream and the second bit stream to a decode side where the first and second bit streams are then decoded and the Ambisonics audio is rendered into a plurality of audio channels that characterize the original audio scene.
A decode side system for object audio, the system comprising a processor configured to:
- decode a first bit stream to obtain Ambisonics audio that characterizes an original audio scene;
- decode a second bit stream to obtain a subset of original metadata which spatially describes original object audio, wherein the original object audio also characterizes the original audio scene;
- extract object audio from the Ambisonics audio using the subset of original metadata which spatially describes the original object audio;
- and
- render the extracted object audio with the subset of original metadata, based on a desired output layout, into a plurality of audio channels that also characterize the original audio scene.
An article of manufacture comprising a non-transitory machine-readable medium having instructions that configure an audio system to:
- decode a first bit stream to obtain Ambisonics audio that characterizes an original audio scene;
- decode a second bit stream to obtain a subset of original metadata which spatially describes original object audio, wherein the original object audio also characterizes the original audio scene;
- extract object audio from the Ambisonics audio using the subset of original metadata which spatially describes the original object audio;
- and
- render the extracted object audio with the subset of original metadata, based on a desired output layout, into a plurality of audio channels that also characterize the original audio scene.
Dependencies are inferred from the claim text.