JPS5711581A - Corrector for video signal - Google Patents

Corrector for video signal

Info

Publication number
JPS5711581A
JPS5711581A JP8591080A JP8591080A JPS5711581A JP S5711581 A JPS5711581 A JP S5711581A JP 8591080 A JP8591080 A JP 8591080A JP 8591080 A JP8591080 A JP 8591080A JP S5711581 A JPS5711581 A JP S5711581A
Authority
JP
Japan
Prior art keywords
signal
envelope
outputted
gain control
shading
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
JP8591080A
Other languages
Japanese (ja)
Inventor
Kiyoo Hosoi
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 JP8591080A priority Critical patent/JPS5711581A/en
Publication of JPS5711581A publication Critical patent/JPS5711581A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation

Landscapes

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

Abstract

PURPOSE:To correct shading, by comparing the output of an envelope detector with the reference signal, then negative-feeding back the result of comparison to a gain control type amplifier, and picking up a compensated output signal. CONSTITUTION:When a signal IN in which the level of the center A is high, the level of both ends B, B' is lowered, and the locus of the waveform of upper end draws an envelope, is inputted to an envelope detector 2 via a gain control type amplifier 1 by shading, an envelope signal V2 is outputted from a detector 2. Further, when the signal V2 is inputted to a comparator 3, the signal V2 and the reference voltage Vref are compared, and a voltage to the difference (hatched lines X, Y, Z) V3 is outputted. Since this voltage V3 is negative-fed back to the gain control terminal of the amplifier 1 as an AGC signal, the shading is compensated and accurate video signal OUT is outputted.
JP8591080A 1980-06-26 1980-06-26 Corrector for video signal Pending JPS5711581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8591080A JPS5711581A (en) 1980-06-26 1980-06-26 Corrector for video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8591080A JPS5711581A (en) 1980-06-26 1980-06-26 Corrector for video signal

Publications (1)

Publication Number Publication Date
JPS5711581A true JPS5711581A (en) 1982-01-21

Family

ID=13871966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8591080A Pending JPS5711581A (en) 1980-06-26 1980-06-26 Corrector for video signal

Country Status (1)

Country Link
JP (1) JPS5711581A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0325586A (en) * 1989-06-22 1991-02-04 Nec Corp Image correction circuit
US6380767B1 (en) 1999-10-27 2002-04-30 Nec Corporation Connection control circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0325586A (en) * 1989-06-22 1991-02-04 Nec Corp Image correction circuit
US6380767B1 (en) 1999-10-27 2002-04-30 Nec Corporation Connection control circuit

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