JPS5694893A - Process circuit of color video signal - Google Patents

Process circuit of color video signal

Info

Publication number
JPS5694893A
JPS5694893A JP17224879A JP17224879A JPS5694893A JP S5694893 A JPS5694893 A JP S5694893A JP 17224879 A JP17224879 A JP 17224879A JP 17224879 A JP17224879 A JP 17224879A JP S5694893 A JPS5694893 A JP S5694893A
Authority
JP
Japan
Prior art keywords
circuit
signal
output
carrier chrominance
comb
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
JP17224879A
Other languages
Japanese (ja)
Inventor
Ryokichi Watanabe
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.)
Mitsumi Electric Co Ltd
Original Assignee
Mitsumi 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 Mitsumi Electric Co Ltd filed Critical Mitsumi Electric Co Ltd
Priority to JP17224879A priority Critical patent/JPS5694893A/en
Publication of JPS5694893A publication Critical patent/JPS5694893A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/77Circuits 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
    • H04N9/78Circuits 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 for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

Landscapes

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

Abstract

PURPOSE:To eliminate the cross-color disturbance and thus obtain a high-quality color picture, by constituting a process circuit with a comb-shaped filter using a delay circuit which separtates and delivers the luminance signal or the carrier chrominace signal plus a level expanding circuit which gives the level expansion property. CONSTITUTION:The color video signal supplied from the input terminal 1 is supplied to the 1H-delay circuit 2, and the carrier chrominance signal is extracted out of the output of the circuit 2 and by the subtractor circuit 3. Then the carrier chrominance signal of a prescribed frequency is delivered from the band pass filter 9 using a comb-shaped filter. At the same time, the luminance signal of a prescribed frequency is delivered from the band pass filter 13 using a comb-shaped filter. The outputs of the filters 9 and 16 are applied to the level expanders 10 and 14 respectively with te level expansion property given. Thus the carrier chrominance signal with the cross-color disturbance eliminated is delivered from the output terminal 11 of the expander 10. The output of the expander 14 is applid to the adder 15 to be added by the output of the band blocking filter 12. Thus the carrier chrominance signal of a prescribed frequency is eliminated to deliver the luminance signal.
JP17224879A 1979-12-28 1979-12-28 Process circuit of color video signal Pending JPS5694893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17224879A JPS5694893A (en) 1979-12-28 1979-12-28 Process circuit of color video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17224879A JPS5694893A (en) 1979-12-28 1979-12-28 Process circuit of color video signal

Publications (1)

Publication Number Publication Date
JPS5694893A true JPS5694893A (en) 1981-07-31

Family

ID=15938361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17224879A Pending JPS5694893A (en) 1979-12-28 1979-12-28 Process circuit of color video signal

Country Status (1)

Country Link
JP (1) JPS5694893A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129583U (en) * 1984-07-26 1986-02-22 ソニー株式会社 Luminance signal separation circuit
US4766484A (en) * 1986-04-11 1988-08-23 Avesco P.L.C. NTSC/PAL switchable video color decoder using a digital comb filter and method
JPH01236889A (en) * 1988-03-17 1989-09-21 Fujitsu General Ltd Y/c separating circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129583U (en) * 1984-07-26 1986-02-22 ソニー株式会社 Luminance signal separation circuit
JPH04632Y2 (en) * 1984-07-26 1992-01-09
US4766484A (en) * 1986-04-11 1988-08-23 Avesco P.L.C. NTSC/PAL switchable video color decoder using a digital comb filter and method
JPH01236889A (en) * 1988-03-17 1989-09-21 Fujitsu General Ltd Y/c separating circuit

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