JPS55127786A - Frequency characteristic improving circuit of color signal - Google Patents

Frequency characteristic improving circuit of color signal

Info

Publication number
JPS55127786A
JPS55127786A JP3533279A JP3533279A JPS55127786A JP S55127786 A JPS55127786 A JP S55127786A JP 3533279 A JP3533279 A JP 3533279A JP 3533279 A JP3533279 A JP 3533279A JP S55127786 A JPS55127786 A JP S55127786A
Authority
JP
Japan
Prior art keywords
signal
color
change
color signal
compensation
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
JP3533279A
Other languages
Japanese (ja)
Inventor
Takafumi Okada
Yutaka Tanaka
Atsushi Matsuzaki
Toshinobu Isobe
Mitsuo Kawamata
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 JP3533279A priority Critical patent/JPS55127786A/en
Publication of JPS55127786A publication Critical patent/JPS55127786A/en
Pending legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To prevent malfunctions of a high band compensation circuit by turning on and off the operation of the high band compensation circuit of color signals according to components of color signals.
CONSTITUTION: In case that high band components are superposed onto the original color signal to improve the frequency characteristic of the color signal, correlation between change of the luminance signal and change of the color signal is utilized. The compensation quantity is determined by the ratio of the change quantity of the low band luminance signal to the change quantity of the amplitude of the color signal at the amplitude change time. Compensation quantity (R-Y)N is obtained as the ratio of the differentiated value of color difference signal (R-Y)H to luminance signal YW. Meanwhile, inhibition circuit 15 is controlled by multiplication output SM between n-degree differentiated outputs of color difference signal (R-Y)L and luminance signal YL. Correlation between the luminance signal and the color signal is decided by control circuit 20; and if multiplication output SM is small, that is, if correlation is small, compensation is inhibited to obtain a normal screen.
COPYRIGHT: (C)1980,JPO&Japio
JP3533279A 1979-03-26 1979-03-26 Frequency characteristic improving circuit of color signal Pending JPS55127786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3533279A JPS55127786A (en) 1979-03-26 1979-03-26 Frequency characteristic improving circuit of color signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3533279A JPS55127786A (en) 1979-03-26 1979-03-26 Frequency characteristic improving circuit of color signal

Publications (1)

Publication Number Publication Date
JPS55127786A true JPS55127786A (en) 1980-10-02

Family

ID=12438868

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3533279A Pending JPS55127786A (en) 1979-03-26 1979-03-26 Frequency characteristic improving circuit of color signal

Country Status (1)

Country Link
JP (1) JPS55127786A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038206A (en) * 1988-04-30 1991-08-06 Victor Company Of Japan, Ltd. Picture-quality improving circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038206A (en) * 1988-04-30 1991-08-06 Victor Company Of Japan, Ltd. Picture-quality improving circuit
US5053865A (en) * 1988-04-30 1991-10-01 Victor Company Of Japan, Ltd. Picture-quality improving circuit

Similar Documents

Publication Publication Date Title
JPS5484426A (en) Frequency improving circuit for chrominance signal
JPS5437533A (en) Color pickup unit
JPS52123829A (en) Color television receiver
JPS55127786A (en) Frequency characteristic improving circuit of color signal
JPS53124915A (en) Control circuit
JPS53125724A (en) Color television receiver
JPS5324724A (en) Color television receiver
JPS53143125A (en) Color control unit for color television receiver
JPS52153333A (en) Color tv unit
JPS55127787A (en) Frequency characteristic improving circuit of color signal
JPS53149719A (en) Correcting device for time axis
JPS5321524A (en) Chrominance components processing circuit
JPS5483314A (en) Space frequency improving circuit for color signal
JPS5320730A (en) Chroma signal processor
JPS5510289A (en) Frequency characteristic improving circuit for color signal
JPS5541059A (en) Color television camera
JPS5271928A (en) Receiving and recording unit of tv signals
JPS5470730A (en) Reproducer for pal-system color video signal
JPS5294729A (en) Hue adjustment circuit of color tv picture receiver
JPS5597785A (en) Chromaticity-signal phase control circuit
JPS5440028A (en) Beam index type color television picture receiver
JPS5362926A (en) Color television picture receiver
JPS5265619A (en) Color television image receiver
JPS5366329A (en) Reproducing unit for still picture
JPS51118321A (en) Automatic frequency character controlled circuit for color tv set