Invention Grant
- Patent Title: Robust short-time fourier transform acoustic echo cancellation during audio playback
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Application No.: US17327911Application Date: 2021-05-24
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Publication No.: US11646045B2Publication Date: 2023-05-09
- Inventor: Daniele Giacobello
- Applicant: Sonos, Inc.
- Applicant Address: US CA Santa Barbara
- Assignee: Sonos, Inc.
- Current Assignee: Sonos, Inc.
- Current Assignee Address: US CA Santa Barbara
- Agency: Fortem IP LLP
- Agent Benjamin Urban
- Main IPC: G10L21/02
- IPC: G10L21/02 ; G10K11/178 ; H04M9/08 ; G10L21/0208 ; H04R27/00 ; G10L21/0232 ; H04R3/00 ; H04R3/12 ; H04R29/00

Abstract:
Example techniques involve noise-robust acoustic echo cancellation. An example implementation may involve causing one or more speakers of the playback device to play back audio content and while the audio content is playing back, capturing, via the one or more microphones, audio within an acoustic environment that includes the audio playback. The example implementation may involve determining measured and reference signals in the STFT domain. During each nth iteration of an acoustic echo canceller (AEC): the implementation may involve determining a frame of an output signal by generating a frame of a model signal by passing a frame of the reference signal through an instance of an adaptive filter and then redacting the nth frame of the model signal from an nth frame of the measured signal. The implementation may further involve determining an instance of the adaptive filter for a next iteration of the AEC.
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