JPS5647188A - Picture-quality improving device of color television receiver - Google Patents
Picture-quality improving device of color television receiverInfo
- Publication number
- JPS5647188A JPS5647188A JP12462379A JP12462379A JPS5647188A JP S5647188 A JPS5647188 A JP S5647188A JP 12462379 A JP12462379 A JP 12462379A JP 12462379 A JP12462379 A JP 12462379A JP S5647188 A JPS5647188 A JP S5647188A
- Authority
- JP
- Japan
- Prior art keywords
- color difference
- signal
- difference signal
- luminance signal
- polarity
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To improve the resolution of a colored picture part by positively mixing the high frequency component of a luminance signal into a color difference signal according to the intensity of the color difference signal. CONSTITUTION:Color difference signal C-Y is inputted from coloring signal source 11 to differentiating circuit 19 for differentiation. Luminance signal Y, on the other hand, is applied to and differentiated by differentiating circuit 20 as well. Differential outputs of differentiating circuits 19 and 20 are inputted to multiplier 21 to output their product. The polarity of its output is positive when transient parts of luminance signal Y and color difference signal C-Y rise or fall in the same direction or negative when in the opposite direction. The circuit method like this, when the luminance signal and color difference signal differ in transient polarity, reduces the amplitude or inverts the polarity of high frequency component YH of the luminance signal applied to variable gain amplifier 17.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12462379A JPS5647188A (en) | 1979-09-26 | 1979-09-26 | Picture-quality improving device of color television receiver |
US06/188,478 US4316215A (en) | 1979-09-26 | 1980-09-18 | System for improving reproduction of images in a color television receiver |
GB8030371A GB2062400B (en) | 1979-09-26 | 1980-09-19 | Colour television receivers |
DE3036388A DE3036388C2 (en) | 1979-09-26 | 1980-09-26 | A system for enhancing the sharpness of color television images in a color television set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12462379A JPS5647188A (en) | 1979-09-26 | 1979-09-26 | Picture-quality improving device of color television receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5647188A true JPS5647188A (en) | 1981-04-28 |
Family
ID=14889993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12462379A Pending JPS5647188A (en) | 1979-09-26 | 1979-09-26 | Picture-quality improving device of color television receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5647188A (en) |
-
1979
- 1979-09-26 JP JP12462379A patent/JPS5647188A/en active Pending
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