JPS574682A - Secam color discriminating circuit - Google Patents

Secam color discriminating circuit

Info

Publication number
JPS574682A
JPS574682A JP7774280A JP7774280A JPS574682A JP S574682 A JPS574682 A JP S574682A JP 7774280 A JP7774280 A JP 7774280A JP 7774280 A JP7774280 A JP 7774280A JP S574682 A JPS574682 A JP S574682A
Authority
JP
Japan
Prior art keywords
signal
color
circuit
supplied
signals
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
JP7774280A
Other languages
Japanese (ja)
Inventor
Teruo Minagawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7774280A priority Critical patent/JPS574682A/en
Publication of JPS574682A publication Critical patent/JPS574682A/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
    • H04N9/44—Colour synchronisation
    • H04N9/47—Colour synchronisation for sequential signals

Landscapes

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

Abstract

PURPOSE:To obtaifn an SECAM color discriminating circuit with high resistivity to noise and assured operation, by discriminating the color with the burst signals of both the R-Y and B-Y signals of two color subcarrier waves. CONSTITUTION:The color signal supplied from an input terminal 3 is supplied to a band pass filter 16 from an amplifying circuit 17 via an amplitude limiting circuit 17, and the signal component containing the B-Y signal of reference subcarrier wave is extracted to suply to an input of a multiplication/wave detection circuit 18. The color signal supplied to an SECAM switch 10 from the circuit 8 is separated into the R-Y and B-Y signals in terms of an output to extract. Then the signal is supplied to the other input of the circuit 18 from the output in which the R-Y signal emerges when the working phase of an FF7 is correct. The difference signal of these two color subcarrier waves is extracted through a band pass filter 19, and a correct color discriminating state is decided when the output level of the difference signal exceeds a certain value. Thus the killer signal is released.
JP7774280A 1980-06-11 1980-06-11 Secam color discriminating circuit Pending JPS574682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7774280A JPS574682A (en) 1980-06-11 1980-06-11 Secam color discriminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7774280A JPS574682A (en) 1980-06-11 1980-06-11 Secam color discriminating circuit

Publications (1)

Publication Number Publication Date
JPS574682A true JPS574682A (en) 1982-01-11

Family

ID=13642355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7774280A Pending JPS574682A (en) 1980-06-11 1980-06-11 Secam color discriminating circuit

Country Status (1)

Country Link
JP (1) JPS574682A (en)

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