JPS5757097A - Secam signal discriminating method - Google Patents

Secam signal discriminating method

Info

Publication number
JPS5757097A
JPS5757097A JP13207980A JP13207980A JPS5757097A JP S5757097 A JPS5757097 A JP S5757097A JP 13207980 A JP13207980 A JP 13207980A JP 13207980 A JP13207980 A JP 13207980A JP S5757097 A JPS5757097 A JP S5757097A
Authority
JP
Japan
Prior art keywords
frequency
signal
color subcarrier
converter
deltaf
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
JP13207980A
Other languages
Japanese (ja)
Other versions
JPS6349957B2 (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
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP13207980A priority Critical patent/JPS5757097A/en
Priority to GB8128149A priority patent/GB2086175B/en
Priority to DE19813137268 priority patent/DE3137268C2/en
Priority to FR8118165A priority patent/FR2490905B1/en
Publication of JPS5757097A publication Critical patent/JPS5757097A/en
Publication of JPS6349957B2 publication Critical patent/JPS6349957B2/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
    • H04N9/64—Circuits for processing colour signals
    • H04N9/642—Multi-standard receivers

Landscapes

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

Abstract

PURPOSE:To discriminate a frequency stably against the fluctuation of the frequency of the color subcarrier, by utilizing the fact that the level radio of two kinds of spectrum becomes infinite in the valley part of spectrums. CONSTITUTION:An input horizontal synchronizing signal fH including frequency variation DELTAf is multiplied in a PLL multiplying circuit 32 by an integral multiple to obtain a signal which is equal to one of two frequencies of the color subcarrier and is synchronized with the horizontal synchronizing signal, and the sum of this obtained signal and a reference frequency fS from an oscillator 36 is obtained by a frequency converter 34. The difference between the output signal from the converter 34 and the burst gated color subcarrier frequency from a terminal 40 is operated by a frequency converter 38, and frequency variation DELTAf is eliminated to obtain frequencies fS and fS+10fH. Next, a valley of the frequency spectrum of the frequency fS or fS+10fH is obtained, and its frequency is used as a center frequency for discrimination of an SECAM signal.
JP13207980A 1980-09-21 1980-09-23 Secam signal discriminating method Granted JPS5757097A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP13207980A JPS5757097A (en) 1980-09-23 1980-09-23 Secam signal discriminating method
GB8128149A GB2086175B (en) 1980-09-21 1981-09-17 Circuit for discriminating secam television signals
DE19813137268 DE3137268C2 (en) 1980-09-21 1981-09-18 Method and discriminator circuit for the detection of SECAM television signals
FR8118165A FR2490905B1 (en) 1980-09-21 1981-09-21 SECAM TELEVISION SIGNAL DISCRIMINATION CIRCUIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13207980A JPS5757097A (en) 1980-09-23 1980-09-23 Secam signal discriminating method

Publications (2)

Publication Number Publication Date
JPS5757097A true JPS5757097A (en) 1982-04-06
JPS6349957B2 JPS6349957B2 (en) 1988-10-06

Family

ID=15073010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13207980A Granted JPS5757097A (en) 1980-09-21 1980-09-23 Secam signal discriminating method

Country Status (1)

Country Link
JP (1) JPS5757097A (en)

Also Published As

Publication number Publication date
JPS6349957B2 (en) 1988-10-06

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