JPS5680974A - Picture-quality improving device of color television receiver - Google Patents

Picture-quality improving device of color television receiver

Info

Publication number
JPS5680974A
JPS5680974A JP15854279A JP15854279A JPS5680974A JP S5680974 A JPS5680974 A JP S5680974A JP 15854279 A JP15854279 A JP 15854279A JP 15854279 A JP15854279 A JP 15854279A JP S5680974 A JPS5680974 A JP S5680974A
Authority
JP
Japan
Prior art keywords
output
signal
frequency component
color difference
luminance
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
JP15854279A
Other languages
Japanese (ja)
Other versions
JPS601793B2 (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 JP54158542A priority Critical patent/JPS601793B2/en
Priority to US06/188,478 priority patent/US4316215A/en
Priority to GB8030371A priority patent/GB2062400B/en
Priority to DE3036388A priority patent/DE3036388C2/en
Publication of JPS5680974A publication Critical patent/JPS5680974A/en
Publication of JPS601793B2 publication Critical patent/JPS601793B2/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 part by mixing the high-frequency component of a luminance signal according to the magnitude of a color difference signal. CONSTITUTION:Nonlinear transmission characteristics are provided to the output of color difference signal source 11 to control variable gain amplifier 15. The high- frequency component is extracted from the output of luminance signal source 12 and modulated by a modulating signal that operates suppressively where a variation rate detected by luminance-level-variation-rate detector 21 is large. The gain to the high-frequency component of the output of modulator 22 is adjusted by the control signal of nonlinear transmitting circuit 13. Then, the output of variable gain amplifier 15, a color difference signal and luminance signal are added together by adder 16, so that the resolution of a colored part can be improved.
JP54158542A 1979-09-26 1979-12-06 Image quality improvement device for color television receivers Expired JPS601793B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP54158542A JPS601793B2 (en) 1979-12-06 1979-12-06 Image quality improvement device for color television receivers
US06/188,478 US4316215A (en) 1979-09-26 1980-09-18 System for improving reproduction of images in a color television receiver
GB8030371A GB2062400B (en) 1979-09-26 1980-09-19 Colour television receivers
DE3036388A DE3036388C2 (en) 1979-09-26 1980-09-26 A system for enhancing the sharpness of color television images in a color television set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54158542A JPS601793B2 (en) 1979-12-06 1979-12-06 Image quality improvement device for color television receivers

Publications (2)

Publication Number Publication Date
JPS5680974A true JPS5680974A (en) 1981-07-02
JPS601793B2 JPS601793B2 (en) 1985-01-17

Family

ID=15673974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54158542A Expired JPS601793B2 (en) 1979-09-26 1979-12-06 Image quality improvement device for color television receivers

Country Status (1)

Country Link
JP (1) JPS601793B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG11201605372QA (en) 2013-12-31 2016-08-30 Adama Makhteshim Ltd 5-fluoro-4-imino-3-(alkyl/substituted alkyl)-1- (arylsulfonyl)-3,4-dihydropyrimidin-2(1h)-one and processes for their preparation

Also Published As

Publication number Publication date
JPS601793B2 (en) 1985-01-17

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