DE2822837C2 - Schaltung zur dynamischen Unterdrückung kleiner Wechselsignalamplituden - Google Patents
Schaltung zur dynamischen Unterdrückung kleiner WechselsignalamplitudenInfo
- Publication number
- DE2822837C2 DE2822837C2 DE2822837A DE2822837A DE2822837C2 DE 2822837 C2 DE2822837 C2 DE 2822837C2 DE 2822837 A DE2822837 A DE 2822837A DE 2822837 A DE2822837 A DE 2822837A DE 2822837 C2 DE2822837 C2 DE 2822837C2
- Authority
- DE
- Germany
- Prior art keywords
- signal
- circuit
- output
- frequency
- amplitude
- 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.)
- Expired
Links
- 230000001629 suppression Effects 0.000 title description 22
- 230000000694 effects Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims 8
- 238000000926 separation method Methods 0.000 claims 6
- 230000001934 delay Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/911—Television signal processing therefor for the suppression of noise
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Television Signal Processing For Recording (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/801,001 US4167749A (en) | 1977-05-26 | 1977-05-26 | Noise reduction apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2822837A1 DE2822837A1 (de) | 1978-12-07 |
| DE2822837C2 true DE2822837C2 (de) | 1987-05-07 |
Family
ID=25179935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2822837A Expired DE2822837C2 (de) | 1977-05-26 | 1978-05-24 | Schaltung zur dynamischen Unterdrückung kleiner Wechselsignalamplituden |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4167749A (US20080138455A1-20080612-C00006.png) |
| JP (1) | JPS53147434A (US20080138455A1-20080612-C00006.png) |
| DE (1) | DE2822837C2 (US20080138455A1-20080612-C00006.png) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54143021A (en) * | 1978-04-28 | 1979-11-07 | Sony Corp | Processing circuit of video signal |
| US4309722A (en) * | 1980-05-27 | 1982-01-05 | Rca Corporation | Video disc player noise reduction circuit |
| US4509080A (en) * | 1982-07-02 | 1985-04-02 | Rca Corporation | Video signal peaking system |
| GB2118007B (en) * | 1982-03-31 | 1985-11-13 | Rca Corp | Adjustable coring circuit |
| GB2118396B (en) * | 1982-03-31 | 1985-09-25 | Rca Corp | Video signal peaking system |
| US4437124A (en) * | 1982-04-30 | 1984-03-13 | Rca Corporation | Dynamic coring circuit |
| US4538236A (en) * | 1982-09-24 | 1985-08-27 | Rca Corporation | Adaptive digital signal coring circuit |
| US4538178A (en) * | 1983-06-24 | 1985-08-27 | Rca Corporation | Digital signal peaking apparatus with controllable peaking level |
| US4573075A (en) * | 1983-06-24 | 1986-02-25 | Rca Corporation | Digital signal coring apparatus with controllable coring threshold level |
| US4536796A (en) * | 1983-08-23 | 1985-08-20 | Rca Corporation | Non-linear dynamic coring circuit for video signals |
| JPH0620304B2 (ja) * | 1985-03-04 | 1994-03-16 | 株式会社東芝 | 動き部分検出回路 |
| US4918633A (en) * | 1985-11-25 | 1990-04-17 | Eastman Kodak Company | Digital image noise reduction method and transmission system |
| JPH0760566B2 (ja) * | 1986-04-08 | 1995-06-28 | ソニー株式会社 | Ｆｍ録再系のノイズ低減回路 |
| US5025316A (en) * | 1989-11-06 | 1991-06-18 | North American Philips Corporation | Video noise reduction system with measured noise input |
| US5799111A (en) * | 1991-06-14 | 1998-08-25 | D.V.P. Technologies, Ltd. | Apparatus and methods for smoothing images |
| DE19925046A1 (de) * | 1999-06-01 | 2001-05-03 | Alcatel Sa | Verfahren und Vorrichtung zur Unterdrückung von Rauschen und Echos |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB685483A (en) * | 1950-06-23 | 1953-01-07 | Gen Electric Co Ltd | Improvements in or relating to television apparatus |
| DE1908247B2 (de) * | 1969-02-19 | 1971-03-04 | Fernseh Gmbh, 6100 Darmstadt | Schaltungsanordnung zur verringerung von stoerungen hoeherer frequenz (rauschen) in breitbandigen elektrischen signalen insbesondere fernsehsignalen |
| US3971064A (en) * | 1971-02-16 | 1976-07-20 | Rca Corporation | Video de-peaking circuit in luminance channel in response to AGC signal |
| US3715477A (en) * | 1971-03-11 | 1973-02-06 | Rca Corp | Video signal noise-limiting apparatus |
| US3872387A (en) * | 1972-09-29 | 1975-03-18 | Zenith Radio Corp | Frequency response modifier for fixed-tuned IF amplifiers |
| JPS5541588B2 (US20080138455A1-20080612-C00006.png) * | 1974-11-21 | 1980-10-24 | ||
| US4009334A (en) * | 1976-03-17 | 1977-02-22 | Eastman Kodak Company | Video noise reduction circuit |
| US4110784A (en) * | 1976-08-30 | 1978-08-29 | Rca Corporation | Noise reduction apparatus |
| US4074321A (en) * | 1976-10-12 | 1978-02-14 | The Magnavox Company | Circuit for separating chroma and luminance information in a composite video signal |
-
1977
- 1977-05-26 US US05/801,001 patent/US4167749A/en not_active Expired - Lifetime
-
1978
- 1978-05-24 DE DE2822837A patent/DE2822837C2/de not_active Expired
- 1978-05-24 JP JP6214778A patent/JPS53147434A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53147434A (en) | 1978-12-22 |
| US4167749A (en) | 1979-09-11 |
| JPS6148313B2 (US20080138455A1-20080612-C00006.png) | 1986-10-23 |
| DE2822837A1 (de) | 1978-12-07 |
Similar Documents
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| DE2822837C2 (de) | Schaltung zur dynamischen Unterdrückung kleiner Wechselsignalamplituden | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |