JPS5597787A - Picture-quality improving unit - Google Patents
Picture-quality improving unitInfo
- Publication number
- JPS5597787A JPS5597787A JP503579A JP503579A JPS5597787A JP S5597787 A JPS5597787 A JP S5597787A JP 503579 A JP503579 A JP 503579A JP 503579 A JP503579 A JP 503579A JP S5597787 A JPS5597787 A JP S5597787A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- circuit
- luminance signal
- secondary differentiation
- 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
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE: To prevent blurring of color to obtain a good-quality picture by subjecting a luminance signal to the secondary differentiation to detect the change part of the luminance signal and by using this detected output signal to modulate the color signal after demodulation and by making change parts of the luminance signal and the color signal equal to each other approximately.
CONSTITUTION: The luminance signal caused to pass through delay line 9 is applied to transistor Tr18 of secondary differentiating circuit 16, and the polarity-inverted secondary differentiation signal is outputted from the output of transformer 21, and the secondary differentiation signal is outputted from Tr23, which constitutes an emitter follower, and is applied to color difference signal modulator circuit 17. Color difference signals R-Y and B-Y demodulated by color demodulator circuit 12 are applied to matric circuit 13, and output color signals R-Y, G-Y and B-Y from circuit 13 are applied to circuit 17 and are modulated by the secondary differentiation signal, and rise and break parts of these signals are made sharp to make change parts of the luminance signal and the color signal equal to each other approximately. Thus, protrusion of color is prevented to project a good-quality picture onto CRT15.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP503579A JPS5597787A (en) | 1979-01-20 | 1979-01-20 | Picture-quality improving unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP503579A JPS5597787A (en) | 1979-01-20 | 1979-01-20 | Picture-quality improving unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5597787A true JPS5597787A (en) | 1980-07-25 |
Family
ID=11600198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP503579A Pending JPS5597787A (en) | 1979-01-20 | 1979-01-20 | Picture-quality improving unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5597787A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166492A (en) * | 1984-09-10 | 1986-04-05 | Pioneer Electronic Corp | Correction circuit of chrominance signal profile |
| JPS61284190A (en) * | 1985-06-11 | 1986-12-15 | Sharp Corp | Enhancer for color video signal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115334A (en) * | 1974-07-30 | 1976-02-06 | Matsushita Electric Ind Co Ltd | Terebijonjuzoki |
| JPS51108518A (en) * | 1975-03-19 | 1976-09-25 | Fuji Telecasting Co Ltd | Iroshingohoseisochi |
-
1979
- 1979-01-20 JP JP503579A patent/JPS5597787A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115334A (en) * | 1974-07-30 | 1976-02-06 | Matsushita Electric Ind Co Ltd | Terebijonjuzoki |
| JPS51108518A (en) * | 1975-03-19 | 1976-09-25 | Fuji Telecasting Co Ltd | Iroshingohoseisochi |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166492A (en) * | 1984-09-10 | 1986-04-05 | Pioneer Electronic Corp | Correction circuit of chrominance signal profile |
| JPS61284190A (en) * | 1985-06-11 | 1986-12-15 | Sharp Corp | Enhancer for color video signal |
| JPH0417593B2 (en) * | 1985-06-11 | 1992-03-26 | Sharp Kk |
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