Invention Grant
- Patent Title: Predictive acoustic echo cancellation
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Application No.: US16678339Application Date: 2019-11-08
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Publication No.: US10937409B2Publication Date: 2021-03-02
- Inventor: Murali Mohan Deshpande , Harinarayanan Erumbi Vallabhan
- Applicant: KNOWLES ELECTRONICS, LLC
- Applicant Address: US IL Itasca
- Assignee: KNOWLES ELECTRONICS, LLC
- Current Assignee: KNOWLES ELECTRONICS, LLC
- Current Assignee Address: US IL Itasca
- Agency: Foley & Lardner LLP
- Main IPC: G10K11/178
- IPC: G10K11/178 ; H04M9/08

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.
Public/Granted literature
- US20200152167A1 PREDICTIVE ACOUSTIC ECHO CANCELLATION Public/Granted day:2020-05-14
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