(19)
(11) EP 0 343 675 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.02.1992 Bulletin 1992/09

(43) Date of publication A2:
29.11.1989 Bulletin 1989/48

(21) Application number: 89109485.6

(22) Date of filing: 26.05.1989
(51) International Patent Classification (IPC)4: H04R 3/00, H04N 5/232
(84) Designated Contracting States:
DE FR GB NL

(30) Priority: 27.05.1988 JP 130675/88
28.06.1988 JP 160085/88
09.09.1988 JP 227007/88

(71) Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Kadoma-shi, Osaka-fu, 571 (JP)

(72) Inventors:
  • Fujimura, Katsunori
    Yokohama-shi Kanagawa-ken (JP)
  • Saitoh, Hiroshi
    Yokohama-shi Kanagawa-ken (JP)
  • Matsumoto, Michio
    Sennan-shi Osaka (JP)

(74) Representative: Schwabe - Sandmair - Marx 
Stuntzstrasse 16
81677 München
81677 München (DE)


(56) References cited: : 
   
       


    (54) A microphone apparatus for a video camera


    (57) 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·D (K1 is a value corresponding to Vc1); a second amplifier for generating a second amplified signal K2·L (K2 is a value corresponding to Vc2); a third amplifier for generating a third amplified signal K2·R; a first adder for generating a first sum signal (k1·D+K2·L); and a second adding means for generating a second sum signal (k1·D+K2·R). The directivity can be varied in accordance with the control of the zoom lens to suitably match images and sounds.







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