JPS5760792A - Control device for chromaticity of picture tube - Google Patents

Control device for chromaticity of picture tube

Info

Publication number
JPS5760792A
JPS5760792A JP55134719A JP13471980A JPS5760792A JP S5760792 A JPS5760792 A JP S5760792A JP 55134719 A JP55134719 A JP 55134719A JP 13471980 A JP13471980 A JP 13471980A JP S5760792 A JPS5760792 A JP S5760792A
Authority
JP
Japan
Prior art keywords
signal
supplied
level
signals
amplifiers
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
JP55134719A
Other languages
Japanese (ja)
Other versions
JPS6361836B2 (en
Inventor
Takafumi Okada
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP55134719A priority Critical patent/JPS5760792A/en
Publication of JPS5760792A publication Critical patent/JPS5760792A/en
Publication of JPS6361836B2 publication Critical patent/JPS6361836B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To perform a good control with a simple constitution even if the video signal level is low, by discriminating a region approximating white on the chromaticity diagram and performing the control when the signal is inside this region. CONSTITUTION:A color difference signal C-Y and a luminance signal Y are supplied to a color decoder 10 to demodulate three primary color signals R, G and B. These signals are supplied to a video output circuit 20, and green and blue primary color signals G and B are added to the original signal through amplifiers 41G and 41B by adding circuit 42G and 42B. The color difference signal C-Y is supplied to an absolute value operating circuit 51 to form a signal¦C-Y¦, and this signal and a signal YL obtained by causing the signal Y to pass through an LPF50 are supplied to an operating circuit 53 to form a signal¦YL/(C-Y)¦. In accordance with the level of this signal, gains of amplifiers 41G and 41B are controlled. Thus, a good control is performed even if the level of the video signal is low, and unnatural emphasis is prevented when the level of only one or two colors is high.
JP55134719A 1980-09-27 1980-09-27 Control device for chromaticity of picture tube Granted JPS5760792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55134719A JPS5760792A (en) 1980-09-27 1980-09-27 Control device for chromaticity of picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55134719A JPS5760792A (en) 1980-09-27 1980-09-27 Control device for chromaticity of picture tube

Publications (2)

Publication Number Publication Date
JPS5760792A true JPS5760792A (en) 1982-04-12
JPS6361836B2 JPS6361836B2 (en) 1988-11-30

Family

ID=15134993

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55134719A Granted JPS5760792A (en) 1980-09-27 1980-09-27 Control device for chromaticity of picture tube

Country Status (1)

Country Link
JP (1) JPS5760792A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63160492A (en) * 1986-12-24 1988-07-04 Victor Co Of Japan Ltd Color detection circuit
US5488429A (en) * 1992-01-13 1996-01-30 Mitsubishi Denki Kabushiki Kaisha Video signal processor for detecting flesh tones in am image
US5638136A (en) * 1992-01-13 1997-06-10 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for detecting flesh tones in an image

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0652284U (en) * 1991-12-19 1994-07-15 三洋電機株式会社 Remote receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63160492A (en) * 1986-12-24 1988-07-04 Victor Co Of Japan Ltd Color detection circuit
US5488429A (en) * 1992-01-13 1996-01-30 Mitsubishi Denki Kabushiki Kaisha Video signal processor for detecting flesh tones in am image
US5561474A (en) * 1992-01-13 1996-10-01 Mitsubishi Denki Kabushiki Kaisha Superimposing circuit performing superimposing based on a color saturation level determined from color difference signals
US5638136A (en) * 1992-01-13 1997-06-10 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for detecting flesh tones in an image

Also Published As

Publication number Publication date
JPS6361836B2 (en) 1988-11-30

Similar Documents

Publication Publication Date Title
ES408321A1 (en) Brightness control
JPS5553978A (en) Automatic luminance adjusting device for television picture receiver
GB2149267A (en) Colour television receivers - colour temperature
JPS56169986A (en) Automatic white color adjusting circuit in television camera
JPS5760792A (en) Control device for chromaticity of picture tube
JPS6460088A (en) Automatic white balance control circuit
JPS57185446A (en) Forming method of color picture
EP0356711A3 (en) Method and apparatus for adjusting chroma
GB1387042A (en) Colour television
JPS5474626A (en) Reproduction system of chroma signal and its circuit
JPS5648790A (en) Color television camera
JPS53125724A (en) Color television receiver
JPS5623086A (en) Picture quality improving circuit of color television receiver
JPS55115782A (en) Color television receiver of projection type
GB1512149A (en) Colour television
JPS5791090A (en) Automatic color balance adjusting device for color television camera
KR930009875B1 (en) Color detecting circuit
JPS6153912B2 (en)
JPS5628580A (en) Color television camera unit
JPS5750186A (en) Color signal processing circuit
GB1374674A (en) White balance control system
JPS5791089A (en) Automatic color balance adjusting device for color television camera
JPS5780891A (en) Color emphasizing circuit
JPS6436285A (en) Picture synthesizer
JPS5758490A (en) Color temperature controller for picture tube