JPS56149179A - Video camera - Google Patents

Video camera

Info

Publication number
JPS56149179A
JPS56149179A JP5329980A JP5329980A JPS56149179A JP S56149179 A JPS56149179 A JP S56149179A JP 5329980 A JP5329980 A JP 5329980A JP 5329980 A JP5329980 A JP 5329980A JP S56149179 A JPS56149179 A JP S56149179A
Authority
JP
Japan
Prior art keywords
signal
circuit
flicker
agc
video 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.)
Granted
Application number
JP5329980A
Other languages
Japanese (ja)
Other versions
JPH0156590B2 (en
Inventor
Seiji Hashimoto
Nobuyoshi Tanaka
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP5329980A priority Critical patent/JPS56149179A/en
Publication of JPS56149179A publication Critical patent/JPS56149179A/en
Publication of JPH0156590B2 publication Critical patent/JPH0156590B2/ja
Granted 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
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

PURPOSE:To reduce a flicker of video signal by detecting only a flocker component in a video signal and by applying the detected signal to an AGC circuit at its control terminal. CONSTITUTION:Output signal 1a of image pickup tube 1 is amplified 3 and video signal 2a is obtained through LPF4. Next, flicker signal 3a is obtained through BPF5. Comparing circuit 6 compares signal 3a with flicker signal 4a obtained from AGC circuit 8 via BPF9 and feedback circuit 10 to detect a flicker error. Output signal 5a of circuit 6 is converted by level setting circuit 7 into proper voltage 6a, which is applied to the gain control terminal of circuit 8 to form a single-round loop. Therefore, circuit 8 varies in gain so that a flicker of signal 2a will be reduced by output voltage 6a of circuit 7. Then, AGC signal 7a is processed by process encoder circuit 11 to obtain NTSC signal 8a.
JP5329980A 1980-04-21 1980-04-21 Video camera Granted JPS56149179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5329980A JPS56149179A (en) 1980-04-21 1980-04-21 Video camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5329980A JPS56149179A (en) 1980-04-21 1980-04-21 Video camera

Publications (2)

Publication Number Publication Date
JPS56149179A true JPS56149179A (en) 1981-11-18
JPH0156590B2 JPH0156590B2 (en) 1989-11-30

Family

ID=12938836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5329980A Granted JPS56149179A (en) 1980-04-21 1980-04-21 Video camera

Country Status (1)

Country Link
JP (1) JPS56149179A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211382A (en) * 1983-05-17 1984-11-30 Zenkoku Asahi Hoso Kk Device for suppressing flicker component included in television video signal
JPS60254882A (en) * 1984-05-31 1985-12-16 Nec Corp Image pickup device
US4774588A (en) * 1986-10-22 1988-09-27 Hitachi, Ltd. Flickerless television camera
WO1997001925A1 (en) * 1995-06-26 1997-01-16 Phase One Denmark A/S Digital camera image recording method and system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109892A (en) * 1959-12-15 1963-11-05 Marconi Co Ltd Television signal converting apparatus
JPS5052928A (en) * 1973-09-08 1975-05-10
JPS5052929A (en) * 1973-09-08 1975-05-10
JPS5062518A (en) * 1973-10-03 1975-05-28
JPS5092635A (en) * 1973-12-14 1975-07-24
JPS50133733A (en) * 1974-04-08 1975-10-23
JPS5234630A (en) * 1975-09-11 1977-03-16 Sony Corp Colr image pickup device
JPS52122039A (en) * 1976-04-06 1977-10-13 Nippon Telegr & Teleph Corp <Ntt> Flicker noise elimination for television camera
JPS5395519A (en) * 1977-02-02 1978-08-21 Hitachi Ltd Facsimile transmitter
JPS5478617A (en) * 1977-12-05 1979-06-22 Nec Corp Automatic level adjusting system for video signal

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109892A (en) * 1959-12-15 1963-11-05 Marconi Co Ltd Television signal converting apparatus
JPS5052928A (en) * 1973-09-08 1975-05-10
JPS5052929A (en) * 1973-09-08 1975-05-10
JPS5062518A (en) * 1973-10-03 1975-05-28
JPS5092635A (en) * 1973-12-14 1975-07-24
JPS50133733A (en) * 1974-04-08 1975-10-23
JPS5234630A (en) * 1975-09-11 1977-03-16 Sony Corp Colr image pickup device
JPS52122039A (en) * 1976-04-06 1977-10-13 Nippon Telegr & Teleph Corp <Ntt> Flicker noise elimination for television camera
JPS5395519A (en) * 1977-02-02 1978-08-21 Hitachi Ltd Facsimile transmitter
JPS5478617A (en) * 1977-12-05 1979-06-22 Nec Corp Automatic level adjusting system for video signal

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211382A (en) * 1983-05-17 1984-11-30 Zenkoku Asahi Hoso Kk Device for suppressing flicker component included in television video signal
JPH027226B2 (en) * 1983-05-17 1990-02-16 Zenkoku Asahi Hoso Kk
JPS60254882A (en) * 1984-05-31 1985-12-16 Nec Corp Image pickup device
US4774588A (en) * 1986-10-22 1988-09-27 Hitachi, Ltd. Flickerless television camera
WO1997001925A1 (en) * 1995-06-26 1997-01-16 Phase One Denmark A/S Digital camera image recording method and system

Also Published As

Publication number Publication date
JPH0156590B2 (en) 1989-11-30

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