JPS54140827A - Removing unit for cross color and dot disturbance - Google Patents
Removing unit for cross color and dot disturbanceInfo
- 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
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
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) |
-
1978
- 1978-04-24 JP JP4887778A patent/JPS5937919B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5937919B2 (en) | 1984-09-12 |
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