Correlating scene-based audio data for psychoacoustic audio coding

A method of encoding scene-based audio data, the method comprising:

• performing spatial audio encoding with respect to the scene-based audio data to obtain a plurality of background components of a soundfield represented by the scene-based audio data, a plurality of foreground audio signals, and a corresponding plurality of spatial components, each of the plurality of spatial components defining spatial characteristics of a corresponding foreground audio signal of the plurality of foreground audio signals;
• performing correlation between at least one of the plurality of background components and at least one of the plurality foreground audio signals to obtain a plurality of correlated components;
• performing psychoacoustic audio encoding with respect to one or more of the plurality of correlated components to obtain encoded components;
• and
• specifying, in a bitstream, the encoded components.

A device configured to decode a bitstream representative of scene-based audio data, the device comprising:

• a memory configured to store the bitstream, the bitstream including a plurality of encoded correlated components of a soundfield represented by the scene-based audio data;
• and
• one or more processors configured to:
• perform psychoacoustic audio decoding with respect to one or more of the plurality of encoded correlated components to obtain a plurality of correlated components;
• obtain, from the bitstream, an indication representative of how the one or more of the plurality of correlated components were reordered in the bitstream, wherein the plurality of correlated components include a background component correlated to a foreground audio signal;
• reorder, based on the indication, the plurality of correlated components to obtain a plurality of reordered components;
• and
• reconstruct, based on the plurality of reordered components, the scene-based audio data.

A method of decoding a bitstream representative of scene-based audio data, the method comprising:

• obtaining, from the bitstream, a plurality of encoded correlated components;
• performing psychoacoustic audio decoding with respect to one or more of the plurality of encoded correlated components to obtain a plurality of correlated components;
• obtaining, from the bitstream, an indication representative of how the one or more of the plurality of correlated components were reordered in the bitstream, wherein the plurality of correlated components include a background component correlated to a foreground audio signal;
• reordering, based on the indication, the plurality of correlated components to obtain a plurality of reordered components;
• and
• reconstructing, based on the plurality of reordered components, the scene-based audio data.