JPS55150669A - Noise eliminating circuit - Google Patents
Noise eliminating circuitInfo
- Publication number
- JPS55150669A JPS55150669A JP5889079A JP5889079A JPS55150669A JP S55150669 A JPS55150669 A JP S55150669A JP 5889079 A JP5889079 A JP 5889079A JP 5889079 A JP5889079 A JP 5889079A JP S55150669 A JPS55150669 A JP S55150669A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- att
- terminal
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Synchronizing For Television (AREA)
- Picture Signal Circuits (AREA)
Abstract
PURPOSE:To improve S/N of signals having vertical correlation, by cascading the first attenuator ATT circuit, a one-horizontal period delay circuit, and the second ATT circuit and by connecting the output of the second ATT circuit and the input of the delay circuit. CONSTITUTION:ATT circuit 2 which multiplies a signal level by factor (1-alpha) (0<alpha<1), delay circuit 3 which has gain 1 and delays a signal by the one-horizontal period, and ATT circuit 4 which multiplies a signal level by factor alpha are cascaded to input terminal 1 of the video signal, and the output of circuit 4 is connected to the input of circuit 3. In this constitution, if video signal Vi(n) supplied to terminal 1 has vertical correlation, this signal is taken out to terminal 5 as signal V0(n) of the same level. Meanwhile, when noise is supplied to terminal 1, noise is attenuated because noise is random and has no vertical correlation. Consequently, signals having vertical correlation such as the synchronizing pulse and the burst signal have the S/N improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5889079A JPS55150669A (en) | 1979-05-14 | 1979-05-14 | Noise eliminating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5889079A JPS55150669A (en) | 1979-05-14 | 1979-05-14 | Noise eliminating circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55150669A true JPS55150669A (en) | 1980-11-22 |
JPS6258191B2 JPS6258191B2 (en) | 1987-12-04 |
Family
ID=13097369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5889079A Granted JPS55150669A (en) | 1979-05-14 | 1979-05-14 | Noise eliminating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55150669A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5844866A (en) * | 1981-09-11 | 1983-03-15 | Hitachi Denshi Ltd | Solid-state television camera device |
JPS6278974A (en) * | 1985-10-02 | 1987-04-11 | Victor Co Of Japan Ltd | Noise reducing circuit for video signal |
US4684976A (en) * | 1985-04-18 | 1987-08-04 | Mitsubishi Denki Kabushiki Kaisha | Feedback comb-type filter |
JPS62269574A (en) * | 1986-05-19 | 1987-11-24 | Nec Home Electronics Ltd | Cyclic type noise reduction device |
JPS62281681A (en) * | 1986-05-30 | 1987-12-07 | Nec Home Electronics Ltd | Cycice type noise reducing device |
US4888642A (en) * | 1987-11-07 | 1989-12-19 | Mitsubishi Denki Kabushiki Kaisha | Video signal processor |
-
1979
- 1979-05-14 JP JP5889079A patent/JPS55150669A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5844866A (en) * | 1981-09-11 | 1983-03-15 | Hitachi Denshi Ltd | Solid-state television camera device |
US4684976A (en) * | 1985-04-18 | 1987-08-04 | Mitsubishi Denki Kabushiki Kaisha | Feedback comb-type filter |
JPS6278974A (en) * | 1985-10-02 | 1987-04-11 | Victor Co Of Japan Ltd | Noise reducing circuit for video signal |
JPS62269574A (en) * | 1986-05-19 | 1987-11-24 | Nec Home Electronics Ltd | Cyclic type noise reduction device |
JPS62281681A (en) * | 1986-05-30 | 1987-12-07 | Nec Home Electronics Ltd | Cycice type noise reducing device |
US4888642A (en) * | 1987-11-07 | 1989-12-19 | Mitsubishi Denki Kabushiki Kaisha | Video signal processor |
Also Published As
Publication number | Publication date |
---|---|
JPS6258191B2 (en) | 1987-12-04 |
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