JPS5731287A - Improving device of picture quality - Google Patents

Improving device of picture quality

Info

Publication number
JPS5731287A
JPS5731287A JP10574880A JP10574880A JPS5731287A JP S5731287 A JPS5731287 A JP S5731287A JP 10574880 A JP10574880 A JP 10574880A JP 10574880 A JP10574880 A JP 10574880A JP S5731287 A JPS5731287 A JP S5731287A
Authority
JP
Japan
Prior art keywords
signal
output
carrier chrominance
detector
signal component
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
JP10574880A
Other languages
Japanese (ja)
Inventor
Naomitsu Kusano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10574880A priority Critical patent/JPS5731287A/en
Publication of JPS5731287A publication Critical patent/JPS5731287A/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
    • H04N9/646—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 quality of pictures, by eliminating the dot disturbance emerging on a screen by a carrier chrominance signal at a part where no correlation exists in the vertical direction of a composite video signal. CONSTITUTION:The output of a subtractor 13 is supplied to a wave detector 25. The detector 25 amplifies only the signal component approximate to the frequency of carrier chrominance signal and gives a wave detection to the signal component, and thus leads out the wave detection output to the signal component approximate to the carrier chrominance signal like a wave detector 20. The output of the detector 25 is supplied to one of the two input terminals of a suppressing and eliminating circuit 26. The circuit 26 suppresses and eliminates the signal component approximate to the frequency of the carrier chrominance signal contained in the output of an adder 17 only when the detection signal is obtained simultaneously from the detectors 20 and 25.
JP10574880A 1980-07-31 1980-07-31 Improving device of picture quality Pending JPS5731287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10574880A JPS5731287A (en) 1980-07-31 1980-07-31 Improving device of picture quality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10574880A JPS5731287A (en) 1980-07-31 1980-07-31 Improving device of picture quality

Publications (1)

Publication Number Publication Date
JPS5731287A true JPS5731287A (en) 1982-02-19

Family

ID=14415867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10574880A Pending JPS5731287A (en) 1980-07-31 1980-07-31 Improving device of picture quality

Country Status (1)

Country Link
JP (1) JPS5731287A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636842A (en) * 1984-11-29 1987-01-13 Rca Corporation Comb filter "hanging dot" eliminator
US4638351A (en) * 1982-09-20 1987-01-20 British Broadcasting Corporation Adaptive filter for use in color video signal processing
US4819061A (en) * 1987-06-10 1989-04-04 Dubner Computer Systems, Inc. Recovery of luminance and chrominance information from an encoded color television signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638351A (en) * 1982-09-20 1987-01-20 British Broadcasting Corporation Adaptive filter for use in color video signal processing
US4636842A (en) * 1984-11-29 1987-01-13 Rca Corporation Comb filter "hanging dot" eliminator
US4819061A (en) * 1987-06-10 1989-04-04 Dubner Computer Systems, Inc. Recovery of luminance and chrominance information from an encoded color television signal

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