Invention Grant
- Patent Title: Data aided method for robust direction of arrival (DOA) estimation in the presence of spatially-coherent noise interferers
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Application No.: US16225023Application Date: 2018-12-19
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Publication No.: US10811032B2Publication Date: 2020-10-20
- Inventor: Ghassan Maalouli , Seth Suppappola
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agent E. Alan Davis; James W. Huffman
- Main IPC: G10L25/27
- IPC: G10L25/27 ; G10L25/21 ; G10L21/028 ; G10L17/00 ; G10L25/78 ; G10L15/08

Abstract:
A method and apparatus to determine a direction of arrival (DOA) of a talker in the presence of a source of spatially-coherent noise. A time sequence of audio samples that include the spatially-coherent noise is received and buffered. Aided by previously known data, a trigger point is detected in the time sequence of audio samples when the talker begins to talk. The buffered time sequence of audio samples is separated into a noise segment and a signal-plus-noise segment based on the trigger point. For each direction of a plurality of distinct directions: an energy difference is computed for the direction between the noise segment and the signal-plus-noise segment, and the DOA of the talker is selected as the direction of the plurality of distinct directions having a largest of the computed energy differences.
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