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1. (WO2018127412) AUDIO CAPTURE USING BEAMFORMING

Pub. No.:    WO/2018/127412    International Application No.:    PCT/EP2017/083680
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Thu Dec 21 00:59:59 CET 2017
IPC: H04R 3/00
G10L 21/0216
Applicants: KONINKLIJKE PHILIPS N.V.
Inventors: JANSE, Cornelis Pieter
BLOEMEMDAL, Brian Brand Antonius Johannes
Title: AUDIO CAPTURE USING BEAMFORMING
Abstract:
A beamforming audio capture apparatus comprises a microphone array (301) which is coupled to a first beamformer (303) and a second beamformer (305). The beamformers (303, 305) are filter-and-combine beamformers comprising a plurality of beamform filters each having an adaptive impulse response. A difference processor (309) determines a difference measure between beams of the first beamformer (303) and the second beamformer (305) in response to a comparison of the adaptive impulse responses of the two beamformers (303, 305). The difference measure may e.g. be used to combine the output signals of the beamformers (303, 305). An improved difference measure less sensitive to e.g. diffuse noise may be provided.