JPS5597786A - Picture-quality improving unit - Google Patents
Picture-quality improving unitInfo
- Publication number
- JPS5597786A JPS5597786A JP503479A JP503479A JPS5597786A JP S5597786 A JPS5597786 A JP S5597786A JP 503479 A JP503479 A JP 503479A JP 503479 A JP503479 A JP 503479A JP S5597786 A JPS5597786 A JP S5597786A
- Authority
- JP
- Japan
- Prior art keywords
- color
- luminance signal
- circuit
- picture
- frequency component
- 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
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE: To obtain an excellent color picture by preventing color shading and color errors by mixing a detection output of the high-band component of a luminance signal with a color signal and then by equalizing the rise and fall of it to those of the luminance signal.
CONSTITUTION: A luminance signal from video amplifier circuit 9 is applied to high-frequency component detection circuit 14, which puts the secondary differentiation of the luminance signal into effect to extract the high-frequency component, which is applied to color-difference signal modulation circuit 13. Further, this modulation circuit 13 is applied with color-difference signals R-Y and B-Y demodulated by color demodulation circuit 10 to mix the high-frequency component of the luminance signal with color-difference signals R-Y and B-Y, which are nearly equalized in rise and fall to those of the luminance signal and supplied to matrix circuit 11 to prevent the occurrence of color shading and color errors, thereby projecting an excellent color picture on CRT12.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP503479A JPS5597786A (en) | 1979-01-20 | 1979-01-20 | Picture-quality improving unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP503479A JPS5597786A (en) | 1979-01-20 | 1979-01-20 | Picture-quality improving unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5597786A true JPS5597786A (en) | 1980-07-25 |
JPH0262996B2 JPH0262996B2 (en) | 1990-12-27 |
Family
ID=11600173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP503479A Granted JPS5597786A (en) | 1979-01-20 | 1979-01-20 | Picture-quality improving unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5597786A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4593310A (en) * | 1983-09-22 | 1986-06-03 | High Resolution Television, Inc | Video chroma controller gating chrominance signals by the luminance signal |
-
1979
- 1979-01-20 JP JP503479A patent/JPS5597786A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4593310A (en) * | 1983-09-22 | 1986-06-03 | High Resolution Television, Inc | Video chroma controller gating chrominance signals by the luminance signal |
Also Published As
Publication number | Publication date |
---|---|
JPH0262996B2 (en) | 1990-12-27 |
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