JPS54155726A - Color demodulator for color television signal - Google Patents

Color demodulator for color television signal

Info

Publication number
JPS54155726A
JPS54155726A JP6520478A JP6520478A JPS54155726A JP S54155726 A JPS54155726 A JP S54155726A JP 6520478 A JP6520478 A JP 6520478A JP 6520478 A JP6520478 A JP 6520478A JP S54155726 A JPS54155726 A JP S54155726A
Authority
JP
Japan
Prior art keywords
color
signals
signal
delay
phase
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
JP6520478A
Other languages
Japanese (ja)
Inventor
Noriyuki Sagishima
Takaaki Baba
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 JP6520478A priority Critical patent/JPS54155726A/en
Publication of JPS54155726A publication Critical patent/JPS54155726A/en
Pending legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To simplify the IC-implementation of a demodulation circuit by eliminating the need to adjust a color synchronizing detection function and delay time by using a charge transfer element for the delay line of a color demodulator for color TV signals using a PLL system.
CONSTITUTION: At the time of the color demodulation of a color TV signal using a PLL system, a chrominance signal from terminal 11 is supplied to phase inverter 21 to obtain chrominance signals which are mutually 180° out of phase, and both the signals are applied to sampling circuits 24 and 28 for color difference signals, where sampling operations are carried out by utilizing sampling pulses from pulse generators 25 and 36. At this time, a chrominance signal in phase with the modulation axis of the color difference signal from inverter 21 is applied to 1H delay lines 22 and 30, where it is delayed a half the odd number times a subcarrier frequency close to a 1H period by making use of clock signals from generators 25 and 26; and outputs of delay lines 22 and 30 and those of circuits 24 and 28 are applied to summing arithmetic circuits 23 and 29, where the 1H-delayed color difference signal is mixed with the non-delay signal, thereby eliminating the color error in a scanning period.
COPYRIGHT: (C)1979,JPO&Japio
JP6520478A 1978-05-30 1978-05-30 Color demodulator for color television signal Pending JPS54155726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6520478A JPS54155726A (en) 1978-05-30 1978-05-30 Color demodulator for color television signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6520478A JPS54155726A (en) 1978-05-30 1978-05-30 Color demodulator for color television signal

Publications (1)

Publication Number Publication Date
JPS54155726A true JPS54155726A (en) 1979-12-08

Family

ID=13280143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6520478A Pending JPS54155726A (en) 1978-05-30 1978-05-30 Color demodulator for color television signal

Country Status (1)

Country Link
JP (1) JPS54155726A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04362895A (en) * 1991-06-10 1992-12-15 Canon Inc Color signal processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04362895A (en) * 1991-06-10 1992-12-15 Canon Inc Color signal processor

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