JPS56115086A - Color demodulator - Google Patents

Color demodulator

Info

Publication number
JPS56115086A
JPS56115086A JP1835180A JP1835180A JPS56115086A JP S56115086 A JPS56115086 A JP S56115086A JP 1835180 A JP1835180 A JP 1835180A JP 1835180 A JP1835180 A JP 1835180A JP S56115086 A JPS56115086 A JP S56115086A
Authority
JP
Japan
Prior art keywords
switch
signal
subcarrier
terminal
demodulator
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
JP1835180A
Other languages
Japanese (ja)
Other versions
JPS6129591B2 (en
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 JP1835180A priority Critical patent/JPS56115086A/en
Priority to AU57384/80A priority patent/AU519140B2/en
Priority to US06/139,223 priority patent/US4300155A/en
Priority to AT0206580A priority patent/AT378649B/en
Priority to GB8012737A priority patent/GB2049342B/en
Priority to FR8008629A priority patent/FR2454737B1/en
Priority to DE3014883A priority patent/DE3014883C2/en
Priority to SE8002930A priority patent/SE447690B/en
Priority to NL8002282A priority patent/NL8002282A/en
Priority to FI801250A priority patent/FI69948C/en
Publication of JPS56115086A publication Critical patent/JPS56115086A/en
Publication of JPS6129591B2 publication Critical patent/JPS6129591B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
    • H04N11/165—Decoding means therefor

Landscapes

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

Abstract

PURPOSE:To ensure an accurate demodulation of a R-Y color difference signal, by producing the fH/2-line switch signal without controlling the phase of the fH/2-line changeover switch. CONSTITUTION:The carrier chrominance signal of the TV signal is applied to one input terminal of the 1st switch 12; while the carrier chrominance signal having an inversion of polarity given to the R-Y axis is applied to the other terminal. The output of the switch 12 is applied to the R-Y demodulator 6. At the same time, the burst signal corresponding to the signal of the switch 12 is applied to one and the other terminals of the 2nd switch 16 that has an operation coupling to the switch 12. Furthermore the chrominance subcarrier signal of the R-Y axis is applied to one terminal of the 3rd switch 24 having two input terminals, and the inverse subcarrier of the -(R-Y) axis is applied to the other terminal each. Then the output subcarrier of the switch 24 is applied to the demodulator 6, and the burst signal of the switch 16 and the chrominance subcarrier to be applied to the demodulator 6 are applied to the phase discriminator 17. The switch signal is produed when no coincidence is obtained for the polarity between the subcarrier and the burst signal, and thus the switches 12 and 16 are changed over with each other.
JP1835180A 1979-04-19 1980-02-15 Color demodulator Granted JPS56115086A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP1835180A JPS56115086A (en) 1980-02-15 1980-02-15 Color demodulator
AU57384/80A AU519140B2 (en) 1979-04-19 1980-04-11 Pal demodulator
US06/139,223 US4300155A (en) 1979-04-19 1980-04-11 PAL Demodulator having non-synchronized line switch
AT0206580A AT378649B (en) 1979-04-19 1980-04-17 COLOR DEMODULATOR FOR PAL COLOR TELEVISION SIGNALS
GB8012737A GB2049342B (en) 1979-04-19 1980-04-17 Demodulator circuit for pal colour television signals
FR8008629A FR2454737B1 (en) 1979-04-19 1980-04-17 DEMODULATOR CIRCUIT FOR COLOR TELEVISION SIGNALS
DE3014883A DE3014883C2 (en) 1979-04-19 1980-04-17 Color demodulator for PAL color television signals
SE8002930A SE447690B (en) 1979-04-19 1980-04-18 FERGDEMODULATORKRETS
NL8002282A NL8002282A (en) 1979-04-19 1980-04-18 DEMODULATION LINK FOR COLOR TELEVISION SIGNALS IN THE PAL SYSTEM.
FI801250A FI69948C (en) 1979-04-19 1980-04-18 DEMODULATORKRETS FOER FAERGTELEVISIONSSIGNALER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1835180A JPS56115086A (en) 1980-02-15 1980-02-15 Color demodulator

Publications (2)

Publication Number Publication Date
JPS56115086A true JPS56115086A (en) 1981-09-10
JPS6129591B2 JPS6129591B2 (en) 1986-07-08

Family

ID=11969245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1835180A Granted JPS56115086A (en) 1979-04-19 1980-02-15 Color demodulator

Country Status (1)

Country Link
JP (1) JPS56115086A (en)

Also Published As

Publication number Publication date
JPS6129591B2 (en) 1986-07-08

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