Invention Grant
- Patent Title: FIR filter coefficient calculation for beam-forming filters
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Application No.: US15435744Application Date: 2017-02-17
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Publication No.: US10419849B2Publication Date: 2019-09-17
- Inventor: Andreas Franck , Christoph Sladeczek , Albert Zhykhar
- Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Applicant Address: DE Munich
- Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Current Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Current Assignee Address: DE Munich
- Agency: Perkins Coie LLP
- Agent Michael A. Glenn
- Priority: EP14182043 20140822; DE102015203600 20150227
- Main IPC: H04R1/40
- IPC: H04R1/40 ; H04R3/00 ; H04R3/12

Abstract:
The effectiveness of calculating FIR filter coefficients for beam-forming filters for transducer arrays such as arrays of microphones or loudspeakers, for example, is increased in that the calculation is performed in two stages; namely, on the one hand, by calculating frequency domain filter weights of the beam-forming filters, i.e., coefficients describing the transfer functions of the beam-forming filters within the dimension of the frequency so as to obtain target frequency responses for the beam-forming filters, so that applying the beam-forming filters to the array approximates a desired directional selectivity, and followed by calculating the FIR filter coefficients for the beam-forming filters, i.e., of coefficients describing the impulse response of the beam-forming filters within the time domain, such that the frequency responses of the FIR beam-forming filters approximate the target frequency responses in an optimum manner in accordance with defined criteria.
Public/Granted literature
- US20170164100A1 FIR Filter Coefficient Calculation for Beam-forming Filters Public/Granted day:2017-06-08
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