JPS57121392A - Suppressing device for chroma signal - Google Patents

Suppressing device for chroma signal

Info

Publication number
JPS57121392A
JPS57121392A JP56007673A JP767381A JPS57121392A JP S57121392 A JPS57121392 A JP S57121392A JP 56007673 A JP56007673 A JP 56007673A JP 767381 A JP767381 A JP 767381A JP S57121392 A JPS57121392 A JP S57121392A
Authority
JP
Japan
Prior art keywords
signal
level
output
voltage
white
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
JP56007673A
Other languages
Japanese (ja)
Inventor
Mitsuhisa Nakagawa
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.)
Akai Electric Co Ltd
Original Assignee
Akai 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 Akai Electric Co Ltd filed Critical Akai Electric Co Ltd
Priority to JP56007673A priority Critical patent/JPS57121392A/en
Publication of JPS57121392A publication Critical patent/JPS57121392A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Image Signal Generators (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To suppress a chroma signal in black and white directions concentratively, by setting the output of the chroma signal to zero in a time when the level of a luminance signal is outside the range between a voltage for setting the suppresion level in the black direction and a voltage for setting the suppression level in the white direction. CONSTITUTION:A luminance signal EY is supplied to the first and the second level comparators 1 and 2 from an input terminal T1. As the output of the comparator 1, an output voltage EO1 is obtained for the signal EY less than a suppression level Ei1 in the black direction, and an output voltage Eo2 is obtained for the signal EY equal to or more than the level Ei1. As the output of the comparator 2, the output voltage EO1 is obtained for the signal EY less than a suppression level Ei2 in the white direction, and the output voltage Eo2 is obtained for the signal EY equal to or more than the level Ei2. Signals from comparatos 1 and 2 and a chroma signal ec are supplied to an analogue multiplier 3. Thus, an output signal where the signal ec less than the suppression level in the black direction and more than the suppression level in the white direction is suppressed is obtained from an output terminal T2.
JP56007673A 1981-01-21 1981-01-21 Suppressing device for chroma signal Pending JPS57121392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56007673A JPS57121392A (en) 1981-01-21 1981-01-21 Suppressing device for chroma signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56007673A JPS57121392A (en) 1981-01-21 1981-01-21 Suppressing device for chroma signal

Publications (1)

Publication Number Publication Date
JPS57121392A true JPS57121392A (en) 1982-07-28

Family

ID=11672306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56007673A Pending JPS57121392A (en) 1981-01-21 1981-01-21 Suppressing device for chroma signal

Country Status (1)

Country Link
JP (1) JPS57121392A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536531A (en) * 1976-07-08 1978-01-21 Toshiba Corp Frequency multiplex type color television camera

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536531A (en) * 1976-07-08 1978-01-21 Toshiba Corp Frequency multiplex type color television camera

Similar Documents

Publication Publication Date Title
JPS57121345A (en) Pulse noise eliminating circuit
JPS5675780A (en) Video signal processing circuit
JPS6439185A (en) Enhancing circuit
CA2054820A1 (en) Analog-to-digital converter circuit with offset correction
GB1506413A (en) Colour television apparatus
WO1995028797A3 (en) High luminance color suppression circuit
MY110937A (en) Luminance signal noise suppressor.
MY110231A (en) Apparatus for correcting a color tone of a video signal.
ES441045A1 (en) Automatic peaking apparatus
JPS5534704A (en) Threshold setting circuit
ATE40026T1 (en) LOSS CORRECTION CIRCUIT FOR CORRECTING VIDEO SIGNALS DISTURBED BY LOSSES.
JPS57121392A (en) Suppressing device for chroma signal
GB1512149A (en) Colour television
JPS5761336A (en) Output protection circuit of integrated injection logical circuit
JPS57123786A (en) Suppressor for chroma signal
FR2434538A1 (en) Colour TV voltage locking circuit - discharges, reference voltage capacitor through current reflector controlled by differential amplifier to avoid problems of drift
JPS56104593A (en) Automatic color balance device
JPS54149424A (en) Signal detector of television receiver
JPS5631289A (en) Beam index type color television receiver
JPS5538709A (en) Noise elimination circuit
JPS554747A (en) Video signal recording circuit
JPS54129920A (en) Video signal corrector
JPS573483A (en) Chroma-key effect generator
JPS5797280A (en) Picture elimination circuit
JPS5592081A (en) Adjustment unit of television receiver