JPS56141682A - Color demodulation equipment - Google Patents

Color demodulation equipment

Info

Publication number
JPS56141682A
JPS56141682A JP4489080A JP4489080A JPS56141682A JP S56141682 A JPS56141682 A JP S56141682A JP 4489080 A JP4489080 A JP 4489080A JP 4489080 A JP4489080 A JP 4489080A JP S56141682 A JPS56141682 A JP S56141682A
Authority
JP
Japan
Prior art keywords
polarity
switch
signal
chrominance
output
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
JP4489080A
Other languages
Japanese (ja)
Other versions
JPS6129592B2 (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 JP4489080A priority Critical patent/JPS56141682A/en
Publication of JPS56141682A publication Critical patent/JPS56141682A/en
Publication of JPS6129592B2 publication Critical patent/JPS6129592B2/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
    • H04N9/44—Colour synchronisation
    • H04N9/465—Synchronisation of the PAL-switch

Abstract

PURPOSE:To obtain an R-Y color difference signal whose polarity is correct, by generating a special switching signal from one switch only when the polarity of an R-Y axis component of a burst signal does not coincide with the polarity of a chrominance subcarrier dor demodulation, which is provided to the R-Y demodulator. CONSTITUTION:The first and second static switches 12, 20 which are interlocked and switched only at the time of matching the demodulation polarity are provided, a chrominance signal of a PAL color TV signal is provided to the input terminal of the switch 12, and on the other hand, a chrominance signal whose polarity is inverted to the R-Y axis is provided. The output of this switch 12 is provided to the R-Y demodulator 6, also a chrominance subcarrier oscillator 16 is provided to the switch 20 and the third switch 21, the output of the switch 20 is provided to the demodualtor 6, also the output of the switch 21 is provided to the phase discriminator 25, and the polarity of a burst signal which has been output from the TV signal is detected. When the polarity of an R-Y axis component of the burst signal does not coincide with the polarity of a chrominance subacarrier for demodulation, which is provided to the demodulator 6, a polarity switching signal is generated from the switch 20.
JP4489080A 1980-04-04 1980-04-04 Color demodulation equipment Granted JPS56141682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4489080A JPS56141682A (en) 1980-04-04 1980-04-04 Color demodulation equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4489080A JPS56141682A (en) 1980-04-04 1980-04-04 Color demodulation equipment

Publications (2)

Publication Number Publication Date
JPS56141682A true JPS56141682A (en) 1981-11-05
JPS6129592B2 JPS6129592B2 (en) 1986-07-08

Family

ID=12704070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4489080A Granted JPS56141682A (en) 1980-04-04 1980-04-04 Color demodulation equipment

Country Status (1)

Country Link
JP (1) JPS56141682A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644388A (en) * 1983-12-09 1987-02-17 Thomson-Csf Process and circuit for the demodulation of chrominance signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644388A (en) * 1983-12-09 1987-02-17 Thomson-Csf Process and circuit for the demodulation of chrominance signals

Also Published As

Publication number Publication date
JPS6129592B2 (en) 1986-07-08

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