Reverberation decorrelation for ambisonics audio compression

A non-transitory computer-readable storage medium comprising instructions stored thereon that, when executed by at least one processor, are configured to cause a computing system to:

• receive an audio signal including a plurality of audio channels;
• select a first portion of the plurality of audio channels;
• select a second portion of the plurality of audio channels;
• generate first mixed audio channels by mixing the first portion of the plurality of audio channels with a first time-delayed audio channel;
• generate second mixed audio channels by mixing the second portion of the plurality of audio channels with a second time-delayed audio channel;
• and
• generate an augmented ambisonics model based on the plurality of audio channels, the first mixed audio channels, and the second mixed audio channels.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code;
• the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to:
• receive an audio signal including a plurality of audio channels;
• select a first portion of the plurality of audio channels;
• select a second portion of the plurality of audio channels;
• generate first mixed audio channels by mixing the first portion of the plurality of audio channels with a first time-delayed audio channel;
• generate second mixed audio channels by mixing the second portion of the plurality of audio channels with a second time-delayed audio channel;
• and
• generate an augmented ambisonics model based on the plurality of audio channels, the first mixed audio channels, and the second mixed audio channels.