JPS57118489A - Color killer circuit - Google Patents

Color killer circuit

Info

Publication number
JPS57118489A
JPS57118489A JP12758280A JP12758280A JPS57118489A JP S57118489 A JPS57118489 A JP S57118489A JP 12758280 A JP12758280 A JP 12758280A JP 12758280 A JP12758280 A JP 12758280A JP S57118489 A JPS57118489 A JP S57118489A
Authority
JP
Japan
Prior art keywords
demodulator
color
circuit
noise
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
JP12758280A
Other languages
Japanese (ja)
Other versions
JPS6254274B2 (en
Inventor
Nobukazu Hosoya
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP12758280A priority Critical patent/JPS57118489A/en
Publication of JPS57118489A publication Critical patent/JPS57118489A/en
Publication of JPS6254274B2 publication Critical patent/JPS6254274B2/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
    • H04N9/64—Circuits for processing colour signals
    • H04N9/70—Circuits for processing colour signals for colour killing

Abstract

PURPOSE:To eliminate the malfunction, by comparing the color burst demodulation outputs of two color modulators with each other to produce a color killer signal so that the noise is given from both demodulators in the same way and is cancelled with each other. CONSTITUTION:A color killer circuit 7 carries out the comparison of amplitude between the color burst period output of a B-Y demodulator 6 and the color burst period output of an R-Y demodulator 4 or a G-Y demodulator 5 to obtain a killer signal. Thus the noise is supplied to the circuit 7 from the demodulator 6 and the demodulator 4 or 5 in nearly the same condition to be offset by the in-phase eliminating effect, etc. within the circuit 7. As a result, the circuit 7 has a stable operation to the noise.
JP12758280A 1980-09-11 1980-09-11 Color killer circuit Granted JPS57118489A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12758280A JPS57118489A (en) 1980-09-11 1980-09-11 Color killer circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12758280A JPS57118489A (en) 1980-09-11 1980-09-11 Color killer circuit

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP16846481A Division JPS57127372A (en) 1981-10-20 1981-10-20 Color killer circuit
JP16846381A Division JPS57131189A (en) 1981-10-20 1981-10-20 Color killing circuit

Publications (2)

Publication Number Publication Date
JPS57118489A true JPS57118489A (en) 1982-07-23
JPS6254274B2 JPS6254274B2 (en) 1987-11-13

Family

ID=14963623

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12758280A Granted JPS57118489A (en) 1980-09-11 1980-09-11 Color killer circuit

Country Status (1)

Country Link
JP (1) JPS57118489A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6194488A (en) * 1984-10-15 1986-05-13 Matsushita Electric Ind Co Ltd Chrominance components processing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6194488A (en) * 1984-10-15 1986-05-13 Matsushita Electric Ind Co Ltd Chrominance components processing device
JPH058630B2 (en) * 1984-10-15 1993-02-02 Matsushita Electric Ind Co Ltd

Also Published As

Publication number Publication date
JPS6254274B2 (en) 1987-11-13

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