JPS5754487A - Discriminating method for secam signal - Google Patents

Discriminating method for secam signal

Info

Publication number
JPS5754487A
JPS5754487A JP13042880A JP13042880A JPS5754487A JP S5754487 A JPS5754487 A JP S5754487A JP 13042880 A JP13042880 A JP 13042880A JP 13042880 A JP13042880 A JP 13042880A JP S5754487 A JPS5754487 A JP S5754487A
Authority
JP
Japan
Prior art keywords
pulse
subcarrier
signal
color
inputted
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
JP13042880A
Other languages
Japanese (ja)
Other versions
JPS6326593B2 (en
Inventor
Yoshiteru Kosaka
Seiji Yoshida
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP13042880A priority Critical patent/JPS5754487A/en
Priority to GB8128146A priority patent/GB2086174B/en
Priority to DE19813137269 priority patent/DE3137269C2/en
Priority to FR8117971A priority patent/FR2490904B1/en
Publication of JPS5754487A publication Critical patent/JPS5754487A/en
Publication of JPS6326593B2 publication Critical patent/JPS6326593B2/ja
Granted 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
    • 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
    • H04N9/642—Multi-standard receivers

Landscapes

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

Abstract

PURPOSE: To make stable the discriminating operation of SECAM signals different in frequencies alternately for every horizontal scanning line, by picking up color subcarrier of back porch in a horizontal synchronizing signal and frequency-discriminating the harmonics of this subcarrier for every horizontal scanning line.
CONSTITUTION: A monostable multivibrator 4 is triggered at the front edge of an inputted horizontal synchronizing pulse 20 to output a pulse 22 having a prescribed pulse width (a), a monostable multivibrator 6 is triggered with the rear edge of the pulse 22 to output a burst gate pulse 24 in pulse width (b). This pulse width (b) is taken for sufficient width to pick up a subcarrier 26 and the pulse 24 is applied to a gate circuit 8. On the other hand, a color TV signal is inputted to a BPF12, and the color signal rejecting luminance signal is inputted to the circuit 8 via a limiter 14. The subcarrier is picked up from the color signal, the result passes through a BPF16 in which the center frequency has three times or more spectrum of the subcarrier 26, the output is applied to a frequency discrimination circuit 18 to make the discrimination of the SECAM signal stable.
COPYRIGHT: (C)1982,JPO&Japio
JP13042880A 1980-09-19 1980-09-19 Discriminating method for secam signal Granted JPS5754487A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP13042880A JPS5754487A (en) 1980-09-19 1980-09-19 Discriminating method for secam signal
GB8128146A GB2086174B (en) 1980-09-19 1981-09-17 Circuit for discriminating secam television signals
DE19813137269 DE3137269C2 (en) 1980-09-19 1981-09-18 Circuitry for distinguishing signals from the SECAM color television system from signals from other color television systems
FR8117971A FR2490904B1 (en) 1980-09-19 1981-09-18 SECAM-TYPE TELEVISION SIGNAL DISCRIMINATION CIRCUIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13042880A JPS5754487A (en) 1980-09-19 1980-09-19 Discriminating method for secam signal

Publications (2)

Publication Number Publication Date
JPS5754487A true JPS5754487A (en) 1982-03-31
JPS6326593B2 JPS6326593B2 (en) 1988-05-30

Family

ID=15034001

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13042880A Granted JPS5754487A (en) 1980-09-19 1980-09-19 Discriminating method for secam signal

Country Status (4)

Country Link
JP (1) JPS5754487A (en)
DE (1) DE3137269C2 (en)
FR (1) FR2490904B1 (en)
GB (1) GB2086174B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2086175B (en) * 1980-09-21 1984-07-25 Victor Company Of Japan Circuit for discriminating secam television signals
EP0245038B1 (en) * 1986-05-01 1991-01-30 Victor Company Of Japan, Limited Discriminating circuit for discriminating color television system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6801582A (en) * 1968-02-03 1969-08-05
JPS5086225A (en) * 1973-11-29 1975-07-11
DE2616694A1 (en) * 1976-04-15 1977-10-27 Graetz Gmbh & Co Ohg CIRCUIT ARRANGEMENT FOR THE AUTOMATIC SWITCHING OF A COMBINED PAL SECAM DECODER TO THE PAL OR SECAM SYSTEM

Also Published As

Publication number Publication date
GB2086174B (en) 1984-08-08
JPS6326593B2 (en) 1988-05-30
GB2086174A (en) 1982-05-06
DE3137269C2 (en) 1984-10-31
FR2490904A1 (en) 1982-03-26
FR2490904B1 (en) 1985-06-28
DE3137269A1 (en) 1982-05-27

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