JPS55127786A - Frequency characteristic improving circuit of color signal - Google Patents
Frequency characteristic improving circuit of color signalInfo
- Publication number
- JPS55127786A JPS55127786A JP3533279A JP3533279A JPS55127786A JP S55127786 A JPS55127786 A JP S55127786A JP 3533279 A JP3533279 A JP 3533279A JP 3533279 A JP3533279 A JP 3533279A JP S55127786 A JPS55127786 A JP S55127786A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- change
- color signal
- compensation
- 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 malfunctions of a high band compensation circuit by turning on and off the operation of the high band compensation circuit of color signals according to components of color signals.
CONSTITUTION: In case that high band components are superposed onto the original color signal to improve the frequency characteristic of the color signal, correlation between change of the luminance signal and change of the color signal is utilized. The compensation quantity is determined by the ratio of the change quantity of the low band luminance signal to the change quantity of the amplitude of the color signal at the amplitude change time. Compensation quantity (R-Y)N is obtained as the ratio of the differentiated value of color difference signal (R-Y)H to luminance signal YW. Meanwhile, inhibition circuit 15 is controlled by multiplication output SM between n-degree differentiated outputs of color difference signal (R-Y)L and luminance signal YL. Correlation between the luminance signal and the color signal is decided by control circuit 20; and if multiplication output SM is small, that is, if correlation is small, compensation is inhibited to obtain a normal screen.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3533279A JPS55127786A (en) | 1979-03-26 | 1979-03-26 | Frequency characteristic improving circuit of color signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3533279A JPS55127786A (en) | 1979-03-26 | 1979-03-26 | Frequency characteristic improving circuit of color signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55127786A true JPS55127786A (en) | 1980-10-02 |
Family
ID=12438868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3533279A Pending JPS55127786A (en) | 1979-03-26 | 1979-03-26 | Frequency characteristic improving circuit of color signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55127786A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5038206A (en) * | 1988-04-30 | 1991-08-06 | Victor Company Of Japan, Ltd. | Picture-quality improving circuit |
-
1979
- 1979-03-26 JP JP3533279A patent/JPS55127786A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5038206A (en) * | 1988-04-30 | 1991-08-06 | Victor Company Of Japan, Ltd. | Picture-quality improving circuit |
US5053865A (en) * | 1988-04-30 | 1991-10-01 | Victor Company Of Japan, Ltd. | Picture-quality improving circuit |
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