JPS55137783A - Television camera unit - Google Patents

Television camera unit

Info

Publication number
JPS55137783A
JPS55137783A JP4530179A JP4530179A JPS55137783A JP S55137783 A JPS55137783 A JP S55137783A JP 4530179 A JP4530179 A JP 4530179A JP 4530179 A JP4530179 A JP 4530179A JP S55137783 A JPS55137783 A JP S55137783A
Authority
JP
Japan
Prior art keywords
signal
output
modulated
synchronizing
synchronizing signal
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.)
Pending
Application number
JP4530179A
Other languages
Japanese (ja)
Inventor
Mitsuhiko Okuhara
Taizo Nishino
Kazuo Kawamura
Toshiaki Aoki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4530179A priority Critical patent/JPS55137783A/en
Publication of JPS55137783A publication Critical patent/JPS55137783A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
    • H04N5/185—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE:To prevent picture quality degradation by holding the level of the modulated video signal from a camera head fixed by a variable gain control amplifier. CONSTITUTION:The modulated signal which includes the synchronizing signal and is dependent upon the video signal with the modulation degree of the black level part fixed is generated from camera head 1 and is transmitted to camera controller 2 through cable 3. In controller 2, this modulated signal is led into variable gain control amplifier 10, and the synchronizing signal is extracted through detector 11 from the output. This synchronizing signal is controlled by automatic phase control synchronizing circuit 16. This synchronizing signal is supplied to gate signal generating circuit 17 to generate a gate pulse corresponding to the black level part of the video output. The detection output is gated by this pulse, and amplifier 10 is controlled by the output. Thus, the level of the modulated video signal is held fixed, so that degradation of the picture quality can be prevented.
JP4530179A 1979-04-16 1979-04-16 Television camera unit Pending JPS55137783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4530179A JPS55137783A (en) 1979-04-16 1979-04-16 Television camera unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4530179A JPS55137783A (en) 1979-04-16 1979-04-16 Television camera unit

Publications (1)

Publication Number Publication Date
JPS55137783A true JPS55137783A (en) 1980-10-27

Family

ID=12715486

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4530179A Pending JPS55137783A (en) 1979-04-16 1979-04-16 Television camera unit

Country Status (1)

Country Link
JP (1) JPS55137783A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177871A (en) * 1985-02-01 1986-08-09 Matsushita Electric Ind Co Ltd Television camera device
JPS643369U (en) * 1987-06-25 1989-01-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177871A (en) * 1985-02-01 1986-08-09 Matsushita Electric Ind Co Ltd Television camera device
JPS643369U (en) * 1987-06-25 1989-01-10

Similar Documents

Publication Publication Date Title
ES469495A1 (en) Brightness control circuit employing a closed control loop
ES353731A1 (en) Facsimile multiplex system
ES8308188A1 (en) Compensated clamping circuit in a video signal peaking system
JPS55137783A (en) Television camera unit
GB1211272A (en) Television power supply
JPS54143166A (en) Illumination light detector
GB1349188A (en) Picture generating unit responsive to a video signal
GB903796A (en) Improvements in or relating to television standards conversion apparatus
JPS53126817A (en) Level controller of video signal
JPS5526784A (en) Video amplifier
JPS5466023A (en) Television camera
GB1233586A (en)
JPS5478617A (en) Automatic level adjusting system for video signal
JPS5436122A (en) Generator for still picture signal
JPS5442929A (en) Television picture receiver
JPS6451887A (en) Video signal processor
JPS5772485A (en) X-ray television fluorescopic device
JPS53124027A (en) Frequency characteristics correcting device
JPS5799875A (en) Image pickup device
JPS5791090A (en) Automatic color balance adjusting device for color television camera
JPS57164669A (en) Automatic beam controlling method for image pickup tube
JPS5477530A (en) White control circuit for color television picture receiver
JPS57142077A (en) Boarder signal generator
JPS53125713A (en) X-ray television unit
FR2327691A1 (en) Video signal stabilisation for television transmission - has synch-separator connected to digital control loop with monostable switch controlling amplifier gain (NL130477)