EP0343675A3 - A microphone apparatus for a video camera - Google Patents

A microphone apparatus for a video camera Download PDF

Info

Publication number
EP0343675A3
EP0343675A3 EP19890109485 EP89109485A EP0343675A3 EP 0343675 A3 EP0343675 A3 EP 0343675A3 EP 19890109485 EP19890109485 EP 19890109485 EP 89109485 A EP89109485 A EP 89109485A EP 0343675 A3 EP0343675 A3 EP 0343675A3
Authority
EP
European Patent Office
Prior art keywords
generating
signal
microphone
amplifier
video camera
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890109485
Other languages
German (de)
French (fr)
Other versions
EP0343675A2 (en
EP0343675B1 (en
Inventor
Katsunori Fujimura
Hiroshi Saitoh
Michio Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP63130675A external-priority patent/JPH01300679A/en
Priority claimed from JP63160085A external-priority patent/JPH0210971A/en
Priority claimed from JP63227007A external-priority patent/JPH0738694B2/en
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0343675A2 publication Critical patent/EP0343675A2/en
Publication of EP0343675A3 publication Critical patent/EP0343675A3/en
Application granted granted Critical
Publication of EP0343675B1 publication Critical patent/EP0343675B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/005—Circuits for transducers for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/05—Noise reduction with a separate noise microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic Arrangements (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

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 ampli­ fied 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.
EP89109485A 1988-05-27 1989-05-26 A microphone apparatus for a video camera Expired - Lifetime EP0343675B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP130675/88 1988-05-27
JP63130675A JPH01300679A (en) 1988-05-27 1988-05-27 Microphone device
JP160085/88 1988-06-28
JP63160085A JPH0210971A (en) 1988-06-28 1988-06-28 Microphone equipment
JP63227007A JPH0738694B2 (en) 1988-09-09 1988-09-09 Microphone device
JP227007/88 1988-09-09

Publications (3)

Publication Number Publication Date
EP0343675A2 EP0343675A2 (en) 1989-11-29
EP0343675A3 true EP0343675A3 (en) 1992-02-26
EP0343675B1 EP0343675B1 (en) 1997-11-05

Family

ID=27316167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109485A Expired - Lifetime EP0343675B1 (en) 1988-05-27 1989-05-26 A microphone apparatus for a video camera

Country Status (2)

Country Link
EP (1) EP0343675B1 (en)
DE (1) DE68928423T2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940021467U (en) * 1993-02-08 1994-09-24 Push-pull sound catch microphone
DE19854373B4 (en) * 1998-11-25 2005-02-24 Robert Bosch Gmbh Method for controlling the sensitivity of a microphone

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1116746A (en) * 1964-10-01 1968-06-12 Akustische U Kino Gerate Gesse A microphone arrangement having a variable directional pattern and a camera and microphone combination
US4594610A (en) * 1984-10-15 1986-06-10 Rca Corporation Camera zoom compensator for television stereo audio

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1116746A (en) * 1964-10-01 1968-06-12 Akustische U Kino Gerate Gesse A microphone arrangement having a variable directional pattern and a camera and microphone combination
US4594610A (en) * 1984-10-15 1986-06-10 Rca Corporation Camera zoom compensator for television stereo audio

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
* page 707, line 1 - line 7 * *
JOURNAL OF THE AUDIO ENGINEERING SOCIETY. vol. 30, no. 10, 1 October 1982, NEW YORK US pages 707 - 718; W.L. DOOLEY ET AL.: 'M-S stereo: a powerful technique for working in stereo' *

Also Published As

Publication number Publication date
EP0343675A2 (en) 1989-11-29
DE68928423T2 (en) 1998-06-04
EP0343675B1 (en) 1997-11-05
DE68928423D1 (en) 1997-12-11

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