JPS6489793A - Chrominance signal processor - Google Patents
Chrominance signal processorInfo
- Publication number
- JPS6489793A JPS6489793A JP62246017A JP24601787A JPS6489793A JP S6489793 A JPS6489793 A JP S6489793A JP 62246017 A JP62246017 A JP 62246017A JP 24601787 A JP24601787 A JP 24601787A JP S6489793 A JPS6489793 A JP S6489793A
- Authority
- JP
- Japan
- Prior art keywords
- color
- signal
- color difference
- circuit
- difference signal
- 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
Links
Abstract
PURPOSE:To prevent color bleeding in the direction of a height from generating by detecting the fluctuation quantity of the time base of a color difference signal by means of a part of the color difference signal obtained with the demodulation of a carrier chrominance signal corresponding to the color burst signal, and rotation-controlling the demodulation axis of the carrier chrominance signal according to a detected output. CONSTITUTION:Phase shifting circuits 3 and 4 between a color demodulating circuit 1 and a carrier generating circuit 2 phase-shift carriers fI and fQ generated by the carrier generating circuit 2 by a prescribed quantity according to the control signal form color bleeding decreasing circuits 5 and 6, and supply them to the color demodulating circuit 1 as demodulated carriers fII and fQQ. Color difference signals FI and FQ from the color demodulating circuit 1 are supplied to the respective color bleeding decreasing circuits 5 and 6. The color difference signal FI is supplied to a burst gate circuit 51, and the color difference signal corresponding to the color burst signal is detected. The detected color difference signal is integrated by a integrating circuit 52 to have a prescribed time constant, and the time base fluctuation accompanying to the amplitude fluctuation of the carrier chrominance signal is decreased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62246017A JPS6489793A (en) | 1987-09-30 | 1987-09-30 | Chrominance signal processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62246017A JPS6489793A (en) | 1987-09-30 | 1987-09-30 | Chrominance signal processor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6489793A true JPS6489793A (en) | 1989-04-04 |
Family
ID=17142218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62246017A Pending JPS6489793A (en) | 1987-09-30 | 1987-09-30 | Chrominance signal processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6489793A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6218610B1 (en) | 1997-06-25 | 2001-04-17 | Nec Corporation | Structure for shielding an electronic circuit from radio waves |
-
1987
- 1987-09-30 JP JP62246017A patent/JPS6489793A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6218610B1 (en) | 1997-06-25 | 2001-04-17 | Nec Corporation | Structure for shielding an electronic circuit from radio waves |
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