JPS54140827A - Removing unit for cross color and dot disturbance - Google Patents

Removing unit for cross color and dot disturbance

Info

Publication number
JPS54140827A
JPS54140827A JP4887778A JP4887778A JPS54140827A JP S54140827 A JPS54140827 A JP S54140827A JP 4887778 A JP4887778 A JP 4887778A JP 4887778 A JP4887778 A JP 4887778A JP S54140827 A JPS54140827 A JP S54140827A
Authority
JP
Japan
Prior art keywords
signal
color
circuit
chrominance
amplifier
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
JP4887778A
Other languages
Japanese (ja)
Other versions
JPS5937919B2 (en
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 JP4887778A priority Critical patent/JPS5937919B2/en
Publication of JPS54140827A publication Critical patent/JPS54140827A/en
Publication of JPS5937919B2 publication Critical patent/JPS5937919B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a unit which removes cross color and dot disrurbance caused by mutual leakage between the high-band part of a luminance signal and a chrominance signal of a color television signal transmitted with a carrier superposed upon the high-band part of the luminance signal on a PAL system.
CONSTITUTION: A PAL-system color television signal detected by video detector 11 is amplified by video amplifier 12; some of it is inputted to band amplifier 16, and the remainder is to luminance-signal delay line 13. A chrominance signal on the PAL system appears at the output of amplifier 16 and is supplied to red difference signal demodulator 17 and blue difference signal demodulator 18, and two kinds of difference signals are led to matric circuit 24. The outpsut of delay line 13, on the other hand, is led to chrominance-subcarrier trap circuit 14 and a color difference signal includng no cross color component of summing circuits 21 and 22 for red and blue color difference signals to operate circuit 14 by a control signal generating circuit only when the signal level becomes more than certain value.
COPYRIGHT: (C)1979,JPO&Japio
JP4887778A 1978-04-24 1978-04-24 Cross color/dot interference removal device Expired JPS5937919B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4887778A JPS5937919B2 (en) 1978-04-24 1978-04-24 Cross color/dot interference removal device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4887778A JPS5937919B2 (en) 1978-04-24 1978-04-24 Cross color/dot interference removal device

Publications (2)

Publication Number Publication Date
JPS54140827A true JPS54140827A (en) 1979-11-01
JPS5937919B2 JPS5937919B2 (en) 1984-09-12

Family

ID=12815503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4887778A Expired JPS5937919B2 (en) 1978-04-24 1978-04-24 Cross color/dot interference removal device

Country Status (1)

Country Link
JP (1) JPS5937919B2 (en)

Also Published As

Publication number Publication date
JPS5937919B2 (en) 1984-09-12

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