JPS568979A - Automatic color signal control circuit - Google Patents

Automatic color signal control circuit

Info

Publication number
JPS568979A
JPS568979A JP8400479A JP8400479A JPS568979A JP S568979 A JPS568979 A JP S568979A JP 8400479 A JP8400479 A JP 8400479A JP 8400479 A JP8400479 A JP 8400479A JP S568979 A JPS568979 A JP S568979A
Authority
JP
Japan
Prior art keywords
hue
variable resistance
color
signal
circuit
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
JP8400479A
Other languages
Japanese (ja)
Inventor
Shigeru Takegami
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8400479A priority Critical patent/JPS568979A/en
Publication of JPS568979A publication Critical patent/JPS568979A/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
    • H04N9/643—Hue control means, e.g. flesh tone control

Landscapes

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

Abstract

PURPOSE:To keep the hue of a receiver constant even if the contrast and a color- saturating variable resistance are varied, and also to reduce the number of control signal input terminals to one by adding two demodulated color difference signals, by making the addition ratio variable and then by sending the sum to a hue control circuit. CONSTITUTION:Composite video signal A, extracted through a video detecting circuit which is not shown in the figure, is input to composite video block 1, where it is demodulated through color signal processing circuit 2 to output color difference signals R-Y, B-Y and G-Y. Signals R-Y and B-Y are added together by way of resistances 15 and 5 reapectively and in thid case, the addition ratio of signals R-Y and B-Y is aadjusted by hue fine-adjusting variable resistance 6, so that the sum signal will be sent to hue control circuit 8. Consequently, even when contrast- adjusting variable resistance 10 and color-saturation adjusting variable resistance 11 and varied, the need for a control input signal to circuit 8 is eliminated, the hue of the receiver is held constant and the number of control signal input terminals can be reduced to one.
JP8400479A 1979-07-04 1979-07-04 Automatic color signal control circuit Pending JPS568979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8400479A JPS568979A (en) 1979-07-04 1979-07-04 Automatic color signal control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8400479A JPS568979A (en) 1979-07-04 1979-07-04 Automatic color signal control circuit

Publications (1)

Publication Number Publication Date
JPS568979A true JPS568979A (en) 1981-01-29

Family

ID=13818428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8400479A Pending JPS568979A (en) 1979-07-04 1979-07-04 Automatic color signal control circuit

Country Status (1)

Country Link
JP (1) JPS568979A (en)

Similar Documents

Publication Publication Date Title
US4481529A (en) Tricolor video signal generator, such as a video game, usable _with a monochrome picture display device
JPS5760791A (en) Demodulating circuit for wide-band receiving chrominance
JPS57160288A (en) Processing circuit for chrominance signal
KR880004686A (en) Luminance signal forming circuit
GB1361274A (en) Selective tint correction circuits
JPS5660186A (en) Chrominance signal processing circuit
JPS568979A (en) Automatic color signal control circuit
ES391550A1 (en) Chroma processing circuitry with selectable color correction mode
JPS6460088A (en) Automatic white balance control circuit
JPS57185446A (en) Forming method of color picture
JPS5623086A (en) Picture quality improving circuit of color television receiver
JPS5780891A (en) Color emphasizing circuit
JPS5495119A (en) Control system for white compression characteristic of color television camera
JPS5760792A (en) Control device for chromaticity of picture tube
JPS5558688A (en) Color correcting circuit
JPS5744385A (en) Signal processing circuit of color video camera
GB1387042A (en) Colour television
JPS5744387A (en) Index-system color television receiver
WO1985005718A1 (en) Colour saturation control circuit
JPS5726828A (en) Television camera
JPS5625884A (en) Color demodulation unit
JPH0564221A (en) Auto white balance device
JPS5942789Y2 (en) television receiver
JPS5718186A (en) Hue correcting circuit
JPS55120282A (en) Color solid pickup unit