JPS5665590A - Color demodulation circuit - Google Patents

Color demodulation circuit

Info

Publication number
JPS5665590A
JPS5665590A JP14264379A JP14264379A JPS5665590A JP S5665590 A JPS5665590 A JP S5665590A JP 14264379 A JP14264379 A JP 14264379A JP 14264379 A JP14264379 A JP 14264379A JP S5665590 A JPS5665590 A JP S5665590A
Authority
JP
Japan
Prior art keywords
fed
polarity
signal
circuit
output
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
JP14264379A
Other languages
Japanese (ja)
Inventor
Noriyuki Sagishima
Teruo Kitani
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 JP14264379A priority Critical patent/JPS5665590A/en
Publication of JPS5665590A publication Critical patent/JPS5665590A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
    • H04N11/165—Decoding means therefor

Landscapes

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

Abstract

PURPOSE:To demodulate the R-Y color difference signal with correct polarity, by controlling the selective polarity of the 1st switch circuit with the polarity of the burst detection output, so that the R-Y color difference signal with correct polarity is obtained. CONSTITUTION:Carrier chrominance signal is fed to one input terminal 22 of the 1st switch circuit 2. The circuit 2 is controlled with the control signal from a control circuit 4 and to the output terminal either one of two inputs is fed. Further, the output signal is fed to an R-Y demodulator 3. To one input terminal 23 of the 2nd switch circuit 7, R-Y demodulation reference subcarrier is fed. Moreover, subcarrier in which the polarity is inverted through the 180 deg. phase shifter 8 is fed to the input terminal 24. The circuit 7 is controlled with a multivibrator 6 which produces the line switching signal in fH/2 through half frequency division of the horizontal pulse, and R-Y reference subcarrier different in the phase by 180 deg. every 1H is produced at the output.
JP14264379A 1979-11-01 1979-11-01 Color demodulation circuit Pending JPS5665590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14264379A JPS5665590A (en) 1979-11-01 1979-11-01 Color demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14264379A JPS5665590A (en) 1979-11-01 1979-11-01 Color demodulation circuit

Publications (1)

Publication Number Publication Date
JPS5665590A true JPS5665590A (en) 1981-06-03

Family

ID=15320116

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14264379A Pending JPS5665590A (en) 1979-11-01 1979-11-01 Color demodulation circuit

Country Status (1)

Country Link
JP (1) JPS5665590A (en)

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