Predictive acoustic echo cancellation
Abstract:
A method for echo cancellation based on microphone signal correlation is disclosed. The method includes replaying a reference signal by a speaker; collecting a primary audio signal by a primary microphone and a secondary audio signal by a secondary microphone based on the reference signal being replayed; partitioning the reference signal into a plurality of sectioned reference signals, based on levels of correlation between the primary audio signal and the secondary audio signal; generating a plurality of sectioned primary echo signals for the primary microphone by processing the sectioned reference signals by an acoustic audio canceller (AEC); generating a plurality of sectioned secondary echo signals for the secondary microphone by processing the sectioned reference signals by a predictive acoustic audio canceller (AEC-P), wherein the AEC-P generates at least one of the sectioned secondary echo signals based on a corresponding sectioned primary echo signal; and performing echo cancellation for the secondary microphone by removing a combination of the sectioned secondary echo signals from the secondary audio signal.
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