JPS6460087A - Signal processing circuit - Google Patents
Signal processing circuitInfo
- Publication number
- JPS6460087A JPS6460087A JP62215162A JP21516287A JPS6460087A JP S6460087 A JPS6460087 A JP S6460087A JP 62215162 A JP62215162 A JP 62215162A JP 21516287 A JP21516287 A JP 21516287A JP S6460087 A JPS6460087 A JP S6460087A
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- low pass
- signal
- deterioration
- characteristic
- 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 reduce the deterioration of a frequency characteristic and to suppress the generation of a moire by switching a low pass characteristic in accordance with the high frequency component of an input signal. CONSTITUTION:Detecting means 21, 22 for detecting the high frequency component of the input signal and a modulating means 13 for obtaining a signal through the passing means of different frequency characteristics and FM modulating it are provided to select the characteristic of a low pass means according to the quantity of the high frequency component included in the input signal. When a strong spectrum is included in the high frequency area of the signal, the moire is prevented by a low pass filter for lowering a component above 4MHz and at the time of the incoming of an ordinary video signal, it is passed through the low pass filter to prevent the deterioration of a high frequency output and prevent the deterioration of a resolution, accordingly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62215162A JPS6460087A (en) | 1987-08-31 | 1987-08-31 | Signal processing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62215162A JPS6460087A (en) | 1987-08-31 | 1987-08-31 | Signal processing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6460087A true JPS6460087A (en) | 1989-03-07 |
Family
ID=16667679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62215162A Pending JPS6460087A (en) | 1987-08-31 | 1987-08-31 | Signal processing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6460087A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1227678A2 (en) * | 2001-01-18 | 2002-07-31 | Seiko Epson Corporation | Memory efficient image artifact removal technique for liquid crystal projectors |
EP1231567A2 (en) * | 2001-01-18 | 2002-08-14 | Seiko Epson Corporation | Image artifact removal technique for liquid crystal projectors |
-
1987
- 1987-08-31 JP JP62215162A patent/JPS6460087A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1227678A2 (en) * | 2001-01-18 | 2002-07-31 | Seiko Epson Corporation | Memory efficient image artifact removal technique for liquid crystal projectors |
EP1231567A2 (en) * | 2001-01-18 | 2002-08-14 | Seiko Epson Corporation | Image artifact removal technique for liquid crystal projectors |
US6879734B2 (en) | 2001-01-18 | 2005-04-12 | Seiko Epson Corporation | Memory efficient image artifact removal technique for LCP |
US6879733B2 (en) | 2001-01-18 | 2005-04-12 | Seiko Epson Corporation | Image artifact removal technique for LCP |
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