JPS6416077A - Noise reduction circuit - Google Patents
Noise reduction circuitInfo
- Publication number
- JPS6416077A JPS6416077A JP62171479A JP17147987A JPS6416077A JP S6416077 A JPS6416077 A JP S6416077A JP 62171479 A JP62171479 A JP 62171479A JP 17147987 A JP17147987 A JP 17147987A JP S6416077 A JPS6416077 A JP S6416077A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- level
- limiter
- signal
- noise
- 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
- Picture Signal Circuits (AREA)
Abstract
PURPOSE:To obtain a desired S/N at all times and to suppress afterimage efficiently by detecting a noise level during the vertical blanking period of a video signal and changing the setting of a limiter level corresponding to the detection level. CONSTITUTION:A limiter level setting circuit 12 sends a signal changing the setting of the limiter level of a limiter circuit 5 in response to an output signal of a noise level detection circuit 11. The circuit 12 sends a signal to increase the limiter level of the limiter circuit 5 when it discriminates that the noise level mixed in the video signal is large in the noise level detection circuit 11 and when it discriminates small mixed in the video signal in the circuit 11, the signal is sent to decrease the limiter level of the circuit 5. Thus, even with various video signals having different S/N applied to the input terminal 1, the noise signal is suppressed with high performance at all times and the after image is suppressed effectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62171479A JPS6416077A (en) | 1987-07-09 | 1987-07-09 | Noise reduction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62171479A JPS6416077A (en) | 1987-07-09 | 1987-07-09 | Noise reduction circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6416077A true JPS6416077A (en) | 1989-01-19 |
Family
ID=15923868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62171479A Pending JPS6416077A (en) | 1987-07-09 | 1987-07-09 | Noise reduction circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6416077A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4926261A (en) * | 1988-02-10 | 1990-05-15 | Sony Corporation | Video noise reduction circuit |
-
1987
- 1987-07-09 JP JP62171479A patent/JPS6416077A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4926261A (en) * | 1988-02-10 | 1990-05-15 | Sony Corporation | Video noise reduction circuit |
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