Invention Grant
- Patent Title: Ambisonic signal noise reduction for microphone arrays
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Application No.: US16352272Application Date: 2019-03-13
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Publication No.: US11026019B2Publication Date: 2021-06-01
- Inventor: S M Akramus Salehin , Dipanjan Sen
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Moore IP
- Main IPC: G10L19/16
- IPC: G10L19/16 ; H04R1/22 ; H04S7/00 ; H03G3/24 ; H04R3/00 ; H04R1/40

Abstract:
A device to apply noise reduction to ambisonic signals includes a memory configured to store noise data corresponding to microphones in a microphone array. A processor is configured to perform signal processing operations on signals captured by microphones in the microphone array to generate multiple sets of ambisonic signals including a first set corresponding to a first particular ambisonic order and a second set corresponding to a second particular ambisonic order. The processor is configured to perform a first noise reduction operation that includes applying a first gain factor to each ambisonic signal in the first set and to perform a second noise reduction operation that includes applying a second gain factor to each ambisonic signal in the second set. The first gain factor and the second gain factor are based on the noise data, and the second gain factor is distinct from the first gain factor.
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