US 11,769,505 B2 · Echo of tone interferance cancellation using two acoustic echo cancellers

Abstract

Example techniques involve systems with multiple acoustic echo cancellers. An example implementation captures first audio within an acoustic environment and detecting, within the captured first audio content, a wake-word. In response to the wake-word and before playing an acknowledgement tone, the implementation activates (a) a first sound canceller when one or more speakers are playing back audio content or (b) a second sound canceller when the one or more speakers are idle. In response to the wake-word and after activating either (a) the first sound canceller or (b) the second sound canceller, the implementation outputs the acknowledgement tone via the one or more speakers. The implementation captures second audio within the acoustic environment and cancelling the acoustic echo of the acknowledgement tone from the captured second audio using the activated sound canceller.

Claims20

Dependent claims

A playback device comprising:

a first acoustic echo canceller (AEC);
a second AEC;
one or more audio transducers;
one or more microphones;
at least one processor;
and
data storage including instructions that are executable by the at least one processor such that the playback device is configured to:
play back first audio content via the one or more audio transducers;
during playback of the first audio content, capture first microphone data via the one or more microphones;
cancel echo of the first audio content from the captured first microphone data via the first AEC;
receive data representing second audio content for playback;
after receipt of at least a portion of the data representing the second audio content, activate the second AEC in place of the first AEC to cancel echo from playback;
play back the second audio content via the one or more audio transducers;
during playback of the second audio content, capture second microphone data via the one or more microphones;
and
cancel echo of the second audio content from the captured second microphone data via the second AEC.

13 more elements

A tangible, non-transitory computer-readable medium comprising instructions that are executable by at least one processor such that a playback device is configured to:

play back first audio content via one or more audio transducers;
during playback of the first audio content, capture first microphone data via one or more microphones;
cancel echo of the first audio content from the captured first microphone data via a first acoustic echo canceller (AEC);
receive data representing second audio content for playback;
after receipt of at least a portion of the data representing the second audio content, activate a second AEC in place of the first AEC to cancel echo from playback;
play back the second audio content via the one or more audio transducers;
during playback of the second audio content, capture second microphone data via the one or more microphones;
and
cancel echo of the second audio content from the captured second microphone data via the second AEC.

6 more elements

Dependencies are inferred from the claim text.

Echo of tone interferance cancellation using two acoustic echo cancellers

Life of this patent

Echo of tone interferance cancellation using two acoustic echo cancellers

Life of this patent

Abstract

Claims20