Multi-Channel Acoustic Echo Cancellation

A non-transitory computer-readable medium, wherein the non-transitory computer-readable medium is provisioned with program instructions that, when executed by at least one processor, cause a playback device to:

• obtain a first audio output of a first channel of audio content that has been produced via one or more first transducers;
• obtain a second audio output of a second channel of the audio content that has been produced via one or more second transducers;
• based on the first and second audio outputs, identify a set of signal components that are to be used for performing acoustic echo cancellations;
• after identifying the set of signal components, receive, by one or more microphones, captured audio content comprising (i) a first portion corresponding to a first channel audio output, (ii) a second portion corresponding to a second channel audio output, and (iii) a third portion corresponding to a voice input, wherein the captured audio content has a first signal-to-noise ratio;
• perform an acoustic echo cancellation on the set of signal components and thereby determine an acoustic echo cancellation output that is to be applied to the captured audio content;
• and
• apply the acoustic echo cancellation output to the captured audio content and thereby determine a second signal-to-noise ratio of the captured audio content that is greater than the first signal-to-noise ratio.

A method carried out by a playback device, the method comprising:

• obtaining a first audio output of a first channel of audio content that has been produced via one or more first transducers;
• obtaining a second audio output of a second channel of the audio content that has been produced via one or more second transducers;
• based on the first and second audio outputs, identifying a set of signal components that are to be used for performing acoustic echo cancellations;
• after identifying the set of signal components, receiving, by one or more microphones, captured audio content comprising (i) a first portion corresponding to a first channel audio output, (ii) a second portion corresponding to a second channel audio output, and (iii) a third portion corresponding to a voice input, wherein the captured audio content has a first signal-to-noise ratio;
• performing an acoustic echo cancellation on the set of signal components and thereby determining an acoustic echo cancellation output that is to be applied to the captured audio content;
• and
• applying the acoustic echo cancellation output to the captured audio content and thereby determine a second signal-to-noise ratio of the captured audio content that is greater than the first signal-to-noise ratio.