Invention Grant
- Patent Title: Beamforming system based on delay distribution model using high frequency phase difference
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Application No.: US16836866Application Date: 2020-03-31
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Publication No.: US11276388B2Publication Date: 2022-03-15
- Inventor: Powen Ru
- Applicant: Nuvoton Technology Corporation
- Applicant Address: TW Hsinchu
- Assignee: Nuvoton Technology Corporation
- Current Assignee: Nuvoton Technology Corporation
- Current Assignee Address: TW Hsinchu
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: G10K11/34
- IPC: G10K11/34 ; H01Q3/26 ; G10K11/36 ; G10L21/0272 ; H04S7/00 ; G01S3/48 ; G10L21/0224 ; H04R3/00 ; G01S3/80 ; G10L19/008 ; G10L25/57

Abstract:
A beamforming system comprises an input module, a phase-difference module, a delay distribution module, and a delay estimation module configured to make a final delay estimation based on the delay distribution. The final delay estimation is applied to align one of two selected channels and combine the two channels to obtain a signal of interest. The phase-difference module calculates phase differences for a range of frequency bins. The delay estimation module considers all possible delays derived from the phase differences, including multiples of ±2π to overcome the ambiguity in high frequency bins when the spacing between two acoustic sensors is longer than the half of the wavelengths.
Public/Granted literature
- US20210304730A1 BEAMFORMING SYSTEM BASED ON DELAY DISTRIBUTION MODEL USING HIGH FREQUENCY PHASE DIFFERENCE Public/Granted day:2021-09-30
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