JPS6429189A - Chrominance signal processor - Google Patents

Chrominance signal processor

Info

Publication number
JPS6429189A
JPS6429189A JP62186203A JP18620387A JPS6429189A JP S6429189 A JPS6429189 A JP S6429189A JP 62186203 A JP62186203 A JP 62186203A JP 18620387 A JP18620387 A JP 18620387A JP S6429189 A JPS6429189 A JP S6429189A
Authority
JP
Japan
Prior art keywords
signal
inputted
chrominance signal
circuit
color killer
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
JP62186203A
Other languages
Japanese (ja)
Other versions
JP2532488B2 (en
Inventor
Yoichi Murakami
Shinichi Uchiyama
Akira Miyamoto
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 JP62186203A priority Critical patent/JP2532488B2/en
Publication of JPS6429189A publication Critical patent/JPS6429189A/en
Application granted granted Critical
Publication of JP2532488B2 publication Critical patent/JP2532488B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To prevent color killer malfunction caused by a crosstalk signal by shifting the phase of the output signal of a voltage controlled crystal oscillator by 90 deg., adding an attenuated signal to an inputted signal and making a color killer discrimination circuit to a color killer state when the inputted signal does not exist or it is extremely small. CONSTITUTION:A device is composed by an attenuator 3 which attanuates the output signal of the voltage controlled crystal oscillator of which phase is shifted 90 deg., the color killer discrimination circuit 36 which discriminates the existence of a normal chrominance signal, a killer switch circuit 16 which opens when the chrominance signal is inputted from the circuit 36 and closes when the chrominance signal is not inputted by the input of the output signal of the attenuator 3 and an adder 1 which adds an inputted carrier chrominance signal and the output signal of the circuit 16 when the chrominance signal is not inputted. Thus, as the voltage controlled crystal oscillator can be stably oscillated even when the chrominance signal is not inputted, the color killer malfunction caused by the crosstalk signal can be prevented and the unpleasant feeling of an user such as color appears or disappears on a television display screen can be eliminated.
JP62186203A 1987-07-24 1987-07-24 Color signal processing device Expired - Lifetime JP2532488B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62186203A JP2532488B2 (en) 1987-07-24 1987-07-24 Color signal processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62186203A JP2532488B2 (en) 1987-07-24 1987-07-24 Color signal processing device

Publications (2)

Publication Number Publication Date
JPS6429189A true JPS6429189A (en) 1989-01-31
JP2532488B2 JP2532488B2 (en) 1996-09-11

Family

ID=16184179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62186203A Expired - Lifetime JP2532488B2 (en) 1987-07-24 1987-07-24 Color signal processing device

Country Status (1)

Country Link
JP (1) JP2532488B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01253727A (en) * 1988-04-01 1989-10-11 Konica Corp Photographic material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01253727A (en) * 1988-04-01 1989-10-11 Konica Corp Photographic material

Also Published As

Publication number Publication date
JP2532488B2 (en) 1996-09-11

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