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JPS57183196A - Demodulating device for color signal - Google Patents

Demodulating device for color signal

Info

Publication number
JPS57183196A
JPS57183196A JP6910981A JP6910981A JPS57183196A JP S57183196 A JPS57183196 A JP S57183196A JP 6910981 A JP6910981 A JP 6910981A JP 6910981 A JP6910981 A JP 6910981A JP S57183196 A JPS57183196 A JP S57183196A
Authority
JP
Japan
Prior art keywords
signal
switch
pal
ntsc
processing part
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
JP6910981A
Other languages
Japanese (ja)
Inventor
Michio Furuhashi
Kenichi Tsunashima
Toshifumi 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.)
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 JP6910981A priority Critical patent/JPS57183196A/en
Publication of JPS57183196A publication Critical patent/JPS57183196A/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
    • H04N9/64—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)

Abstract

PURPOSE:To obtain demodulation by both a PAL signal processing part and an NTSOC signal processing part by using a common-use circuit integrated into one circuit, by using both the PAL signal processing part and NTSC signal processing part partially in common. CONSTITUTION:A composite color television signal supplied to a terminal 1 is passed through band-pass filters 2a (for NTSC) and 2b (for PAL) to separate a chrominance signal, which is supplied to a common-use ACC amplifier 51 through a switch 61. During PAL signal reception, the chrominance signal is applied to adding and subtracting circuits 55 and 54 through a one-line delay line 28 and a switch 64, and from a subcarrier oscillator 53, a reference subcarrier is applied to an R-Y demodulator 56 through a switch 62 for performing switching at a one-line period, thereby performing the synchronous detection of a PAL signal. During NTSC signal reception, the switch 62 is fixed one one side and the one-line delay line 28 is turned off by the switch 64, thus constituting a demodulating circuit for an NTSC signal. In addition, it is necessary to provide double-gain amplifiers 58 and 59 on an NTSC signal side.
JP6910981A 1981-05-07 1981-05-07 Demodulating device for color signal Pending JPS57183196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6910981A JPS57183196A (en) 1981-05-07 1981-05-07 Demodulating device for color signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6910981A JPS57183196A (en) 1981-05-07 1981-05-07 Demodulating device for color signal

Publications (1)

Publication Number Publication Date
JPS57183196A true JPS57183196A (en) 1982-11-11

Family

ID=13393128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6910981A Pending JPS57183196A (en) 1981-05-07 1981-05-07 Demodulating device for color signal

Country Status (1)

Country Link
JP (1) JPS57183196A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880992A (en) * 1981-11-07 1983-05-16 Fujitsu General Ltd Multisystem color signal processing circuit
US4682209A (en) * 1985-03-25 1987-07-21 U.S. Philips Corporation Digital chrominance processor with a phase and frequency controlled digital oscillator independent of the stable oscillator frequency

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5880992A (en) * 1981-11-07 1983-05-16 Fujitsu General Ltd Multisystem color signal processing circuit
US4682209A (en) * 1985-03-25 1987-07-21 U.S. Philips Corporation Digital chrominance processor with a phase and frequency controlled digital oscillator independent of the stable oscillator frequency

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