JPS5680976A - Picture-quality improving device of color television receiver - Google Patents

Picture-quality improving device of color television receiver

Info

Publication number
JPS5680976A
JPS5680976A JP15854679A JP15854679A JPS5680976A JP S5680976 A JPS5680976 A JP S5680976A JP 15854679 A JP15854679 A JP 15854679A JP 15854679 A JP15854679 A JP 15854679A JP S5680976 A JPS5680976 A JP S5680976A
Authority
JP
Japan
Prior art keywords
color difference
gain
picture
luminance signal
television receiver
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
JP15854679A
Other languages
Japanese (ja)
Other versions
JPS6033357B2 (en
Inventor
Yoshio Yasumoto
Hidekazu Taira
Tetsuo Tomimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP54158546A priority Critical patent/JPS6033357B2/en
Priority to US06/184,329 priority patent/US4337479A/en
Priority to FR8019766A priority patent/FR2465383A1/en
Priority to DE19803034532 priority patent/DE3034532A1/en
Priority to CA000360171A priority patent/CA1153463A/en
Priority to GB8029531A priority patent/GB2061663B/en
Publication of JPS5680976A publication Critical patent/JPS5680976A/en
Publication of JPS6033357B2 publication Critical patent/JPS6033357B2/en
Expired 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
    • H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters

Landscapes

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

Abstract

PURPOSE:To improve the definition of a colored part by eliminating erroneous corrections of a skin-colored part by mixing the high-frequency component according to the magnitude of a color difference signal as to R-Y. CONSTITUTION:Among color difference signals from a color difference signal source, R-Y is passed through a nonlinear transmitting circuit with characteristics A, and other G-Y and B-Y are passed through a nonlinear transmitting circuit with characteristics B to obtain gain control signals. A high frequency component is extracted from a luminance signal produced from luminance signal source 12 is supplied to variable gain amplifiers 15 to adjust the gain with gain control signals of R-Y, G-Y and B-Y. Those gain amplification outputs are supplied to adders 16, where color difference signals are added to the luminance signal, so that a sharp color picture having skin-colored parts corrected excellently can be obtained.
JP54158546A 1979-09-13 1979-12-06 Image quality improvement device for color television receivers Expired JPS6033357B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP54158546A JPS6033357B2 (en) 1979-12-06 1979-12-06 Image quality improvement device for color television receivers
US06/184,329 US4337479A (en) 1979-09-13 1980-09-05 Color resolution compensator
FR8019766A FR2465383A1 (en) 1979-09-13 1980-09-12 COLOR IMAGE RESOLUTION COMPENSATOR FOR COLOR TELEVISION RECEIVER
DE19803034532 DE3034532A1 (en) 1979-09-13 1980-09-12 COMPENSATION CIRCUIT TO IMPROVE COLOR RESOLUTION
CA000360171A CA1153463A (en) 1979-09-13 1980-09-12 Color resolution compensator
GB8029531A GB2061663B (en) 1979-09-13 1980-09-12 Colour resolution compensator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54158546A JPS6033357B2 (en) 1979-12-06 1979-12-06 Image quality improvement device for color television receivers

Publications (2)

Publication Number Publication Date
JPS5680976A true JPS5680976A (en) 1981-07-02
JPS6033357B2 JPS6033357B2 (en) 1985-08-02

Family

ID=15674062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54158546A Expired JPS6033357B2 (en) 1979-09-13 1979-12-06 Image quality improvement device for color television receivers

Country Status (1)

Country Link
JP (1) JPS6033357B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0392087A (en) * 1989-09-05 1991-04-17 Konica Corp Contour emphasis device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0392087A (en) * 1989-09-05 1991-04-17 Konica Corp Contour emphasis device

Also Published As

Publication number Publication date
JPS6033357B2 (en) 1985-08-02

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