- Patent Title: Multichannel acoustic echo cancellation for wireless applications
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Application No.: US15001840Application Date: 2016-01-20
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Publication No.: US09997151B1Publication Date: 2018-06-12
- Inventor: Robert Ayrapetian , Philip Ryan Hilmes , Yuwen Su
- Applicant: Amazon Technologies, Inc.
- Applicant Address: US WA Seattle
- Assignee: Amazon Technologies, Inc.
- Current Assignee: Amazon Technologies, Inc.
- Current Assignee Address: US WA Seattle
- Agency: Pierce Atwood LLP
- Main IPC: H04R3/02
- IPC: H04R3/02 ; G10K11/178
Abstract:
An acoustic echo cancellation (AEC) system that detects and compensates for differences in delay times between the AEC system and a set of wireless speakers. The filter coefficients used for AEC are adjusted based on the determined delay time to correct for frequency domain signal rotation.
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