JPS5642485A - Improving device for picture quality of color television receiver - Google Patents

Improving device for picture quality of color television receiver

Info

Publication number
JPS5642485A
JPS5642485A JP11852279A JP11852279A JPS5642485A JP S5642485 A JPS5642485 A JP S5642485A JP 11852279 A JP11852279 A JP 11852279A JP 11852279 A JP11852279 A JP 11852279A JP S5642485 A JPS5642485 A JP S5642485A
Authority
JP
Japan
Prior art keywords
signal
color difference
luminance signal
frequency component
high frequency
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
JP11852279A
Other languages
Japanese (ja)
Other versions
JPS5925549B2 (en
Inventor
Tetsuo Tomimoto
Yoshio Yasumoto
Hidekazu Taira
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 JP54118522A priority Critical patent/JPS5925549B2/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 JPS5642485A publication Critical patent/JPS5642485A/en
Publication of JPS5925549B2 publication Critical patent/JPS5925549B2/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 resolution of a colored picture part by positively mixing the high frequency component of a luminance signal when a color difference signal is at a specific level or more. CONSTITUTION:A color difference signal from color difference signal source 11 is supplied to nonlinear transmitting circuit 13, which after providing nonlinear transmission characteristics, outputs it as a gain control signal. A high frequency component is extracted by high-frequency extracting circuit 14 from a luminance signal from luminance signal source 12 and variable amplifier 15 controls the gain of the high frequency component of the luminance signal with the gain control signal from nonlinear transmitting circuit 13. This controlled high frequency component is supplied as a correction signal to adding unit 16, which adds it to the color difference signal and luminance signal and outputs them for video display. Therefore, as the resolution of a colored picture part is lowered by superposing the color difference signal of a narrow frequency band upon the wide-band luminance signal, the greater correction signal is transmitted to adding unit 16, so that the resolution will improve.
JP54118522A 1979-09-13 1979-09-13 Image quality improvement device for color television receivers Expired JPS5925549B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP54118522A JPS5925549B2 (en) 1979-09-13 1979-09-13 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
JP54118522A JPS5925549B2 (en) 1979-09-13 1979-09-13 Image quality improvement device for color television receivers

Publications (2)

Publication Number Publication Date
JPS5642485A true JPS5642485A (en) 1981-04-20
JPS5925549B2 JPS5925549B2 (en) 1984-06-19

Family

ID=14738691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54118522A Expired JPS5925549B2 (en) 1979-09-13 1979-09-13 Image quality improvement device for color television receivers

Country Status (1)

Country Link
JP (1) JPS5925549B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0499115U (en) * 1991-01-25 1992-08-27
US5390997A (en) * 1992-12-21 1995-02-21 Kabushiki Kaisha Komatsu Seisakusho End face sealing assembly device for track shoe coupling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0499115U (en) * 1991-01-25 1992-08-27
US5390997A (en) * 1992-12-21 1995-02-21 Kabushiki Kaisha Komatsu Seisakusho End face sealing assembly device for track shoe coupling

Also Published As

Publication number Publication date
JPS5925549B2 (en) 1984-06-19

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