Patent ID: 9549255
Date: 2017-01-17
CPC Classifications: G10L,H04R

Claim:
1. A sound pickup apparatus comprising: a plurality of microphone arrays each including three microphones disposed at vertexes of an isosceles right triangle or a regular triangle; a directionality forming unit configured to form directionality, for each of the microphone arrays, only in a forward direction of each of the microphone arrays with respect to a target area by use of beamformers, for each output from each of the microphone arrays, the directionality forming unit comprising: a power correction coefficient calculating unit configured to calculate, a ratio of amplitude spectra of beamformer outputs between outputs for each of the microphone arrays from the directionality forming unit and set a mode or a median of the calculated ratio of amplitude spectra as a correction coefficient which corrects power of beamformer outputs for each of the microphone arrays; and a target area sound extracting unit configured to extract a target area sound by performing the following processes in sequence: