JPS5625884A - Color demodulation unit - Google Patents

Color demodulation unit

Info

Publication number
JPS5625884A
JPS5625884A JP10242279A JP10242279A JPS5625884A JP S5625884 A JPS5625884 A JP S5625884A JP 10242279 A JP10242279 A JP 10242279A JP 10242279 A JP10242279 A JP 10242279A JP S5625884 A JPS5625884 A JP S5625884A
Authority
JP
Japan
Prior art keywords
signal
demodulator
fed
output
switch circuit
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
JP10242279A
Other languages
Japanese (ja)
Inventor
Noriyuki Sagishima
Teruo Kitani
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 JP10242279A priority Critical patent/JPS5625884A/en
Priority to US06/139,222 priority patent/US4337477A/en
Priority to DE19803015459 priority patent/DE3015459A1/en
Priority to GB8012862A priority patent/GB2054314B/en
Publication of JPS5625884A publication Critical patent/JPS5625884A/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
    • H04N9/465—Synchronisation of the PAL-switch

Landscapes

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

Abstract

PURPOSE:To obtain two color difference signals R-Y and B-Y signals in PAL system, by using one local subcarrier oscillator without providing the local subcarrier oscillator. CONSTITUTION:In the carrier chrominance signal, it is fed to the difference operation circuits 2 and 6, phase shifters 3, 7 and switch circuits 4, 8 and the signal including R-Y chroma signal is fed to the R-Y demodulator 5, and that including B-Y is fed to the B-Y demodulator 9. On the other hand, the burst signal is picked up from the chroma carrier signal at the burst pickup circuit 10, this signal is fed to the switch circuit 13 and the automatic phase control circuit 17 controlled at the half frequency divider 15 to control the local subcarrier oscillator 18. The output of the oscillator 18 is demodulated at the R-Y demodulator 5 and the output of the phase shifter 19 demodulates the B-Y demodulator 9. Further, the switch circuit 4 is controlled at the frequency divider 15, and the switch circuit 8 is controlled with the output of the switch circuit and the output of the control circuit 16 taking the phase shifter 19 as the input.
JP10242279A 1979-04-19 1979-08-10 Color demodulation unit Pending JPS5625884A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP10242279A JPS5625884A (en) 1979-08-10 1979-08-10 Color demodulation unit
US06/139,222 US4337477A (en) 1979-04-19 1980-04-11 Color demodulating apparatus
DE19803015459 DE3015459A1 (en) 1979-04-19 1980-04-18 COLOR DEMODULATOR CIRCUIT
GB8012862A GB2054314B (en) 1979-04-19 1980-04-18 Colour signal demodulating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10242279A JPS5625884A (en) 1979-08-10 1979-08-10 Color demodulation unit

Publications (1)

Publication Number Publication Date
JPS5625884A true JPS5625884A (en) 1981-03-12

Family

ID=14327006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10242279A Pending JPS5625884A (en) 1979-04-19 1979-08-10 Color demodulation unit

Country Status (1)

Country Link
JP (1) JPS5625884A (en)

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