JPS5642484A - Improving unit for picture quality of color television receiver - Google Patents

Improving unit for picture quality of color television receiver

Info

Publication number
JPS5642484A
JPS5642484A JP11847979A JP11847979A JPS5642484A JP S5642484 A JPS5642484 A JP S5642484A JP 11847979 A JP11847979 A JP 11847979A JP 11847979 A JP11847979 A JP 11847979A JP S5642484 A JPS5642484 A JP S5642484A
Authority
JP
Japan
Prior art keywords
signal
color difference
difference signal
luminance signal
threshold
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
JP11847979A
Other languages
Japanese (ja)
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 JP11847979A priority Critical patent/JPS5642484A/en
Publication of JPS5642484A publication Critical patent/JPS5642484A/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
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase

Landscapes

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

Abstract

PURPOSE:To improve the definition of a color picture remarkably by using only the high frequency component of a luminance signal for a threshold level. CONSTITUTION:A luminance signal generated by luminance signal source 11, having a high frequency component extracted by high-pass filter 13, is amplitude- limited and then added to a DC bias voltage from DC bias source 18 by adding circuit 16 to generate a threshold signal. This threshold signal and color difference signal are compared by suppressor 20, which when the color difference signal exceeds the threshold level, suppresses part of the color difference signal. The color difference signal partially suppressed is supplied to adder 21, which adds the input to the luminance signal. Thus, the resolution of a picture is improved by improving the waveform of the color difference signal.
JP11847979A 1979-09-14 1979-09-14 Improving unit for picture quality of color television receiver Pending JPS5642484A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11847979A JPS5642484A (en) 1979-09-14 1979-09-14 Improving unit for picture quality of color television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11847979A JPS5642484A (en) 1979-09-14 1979-09-14 Improving unit for picture quality of color television receiver

Publications (1)

Publication Number Publication Date
JPS5642484A true JPS5642484A (en) 1981-04-20

Family

ID=14737684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11847979A Pending JPS5642484A (en) 1979-09-14 1979-09-14 Improving unit for picture quality of color television receiver

Country Status (1)

Country Link
JP (1) JPS5642484A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142371U (en) * 1983-03-14 1984-09-22 関東自動車工業株式会社 Lifting guide device for automobile door glass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142371U (en) * 1983-03-14 1984-09-22 関東自動車工業株式会社 Lifting guide device for automobile door glass

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