The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 1991
Filed:
May. 26, 1989
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A microphone apparatus for a video camera having a zoom lens, comprising: a superdirectional microphone fro generating a superdirectional microphone signal D; a stereo microphone for generating stereo microphone signals L and R; a zoom position sensor for generating a zoom position signal; first and second signal means for generating control signals Vc1 and Vc2 which can be changed according to the zoom position signal; a first amplifier for generating a first amplified signal K1.multidot.D (K1 is a value corresponding to Vc1); a second amplifier for generating a second amplified signal K2.multidot.L (K2 is a value corresponding to Vc2); a third amplifier for generating a third amplified signal K2.multidot.R; a first adder for generating a first sum signal (k1.multidot.D+K2.multidot.L); and a second adding means for generating a second sum signal (k1.multidot.D+K2.multidot.R). The directivity can be varied in accordance with the control of the zoom lens to suitably match images and sounds.