JPS5481027A - Television signal identifying unit - Google Patents

Television signal identifying unit

Info

Publication number
JPS5481027A
JPS5481027A JP14908577A JP14908577A JPS5481027A JP S5481027 A JPS5481027 A JP S5481027A JP 14908577 A JP14908577 A JP 14908577A JP 14908577 A JP14908577 A JP 14908577A JP S5481027 A JPS5481027 A JP S5481027A
Authority
JP
Japan
Prior art keywords
output
signal
secam
burst
line
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
JP14908577A
Other languages
Japanese (ja)
Other versions
JPS5850072B2 (en
Inventor
Shigeyuki Morita
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP14908577A priority Critical patent/JPS5850072B2/en
Publication of JPS5481027A publication Critical patent/JPS5481027A/en
Publication of JPS5850072B2 publication Critical patent/JPS5850072B2/en
Expired 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)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To identify the SECAM and PAL systems and white-and-black and color, with the detector detecting in slope over the both burst signal of the both systems. CONSTITUTION:The burst voltage picked up with the burst pick up amplifier 6 is detected with the detector 7. The detected output is inverted for the polarity every line in case of SECAM, and no inversion is made for PAL system. 8 and 9 are multivibrators in which quasi-stable period is slightly longer than one line period. To SECAM signal, the circuits 8 and 9 repeat inverting restoration every line, and to PAL signal, the circuit 8 continues the inversion mode and the circuit 9 receives only the restoration trigger. To black-and-white signal, the output of the circuits 8 and 9 are both 1 or 0. The output of the NAND gate N100 is 0 or 1, and the OR gate R101 is 1 or 0, and if AND is taken with diodes D102 and D103 for each output, the output is 0.
JP14908577A 1977-12-12 1977-12-12 television signal identification device Expired JPS5850072B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14908577A JPS5850072B2 (en) 1977-12-12 1977-12-12 television signal identification device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14908577A JPS5850072B2 (en) 1977-12-12 1977-12-12 television signal identification device

Publications (2)

Publication Number Publication Date
JPS5481027A true JPS5481027A (en) 1979-06-28
JPS5850072B2 JPS5850072B2 (en) 1983-11-08

Family

ID=15467361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14908577A Expired JPS5850072B2 (en) 1977-12-12 1977-12-12 television signal identification device

Country Status (1)

Country Link
JP (1) JPS5850072B2 (en)

Also Published As

Publication number Publication date
JPS5850072B2 (en) 1983-11-08

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