GB8830122D0 - Method and circuit for the black level control of a video signal - Google Patents
Method and circuit for the black level control of a video signalInfo
- Publication number
- GB8830122D0 GB8830122D0 GB888830122A GB8830122A GB8830122D0 GB 8830122 D0 GB8830122 D0 GB 8830122D0 GB 888830122 A GB888830122 A GB 888830122A GB 8830122 A GB8830122 A GB 8830122A GB 8830122 D0 GB8830122 D0 GB 8830122D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- video signal
- level control
- black level
- black
- 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
- H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
- H04N5/185—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873744076 DE3744076C2 (en) | 1987-12-24 | 1987-12-24 | Method and circuit for black level control of a video signal |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8830122D0 true GB8830122D0 (en) | 1989-02-22 |
GB2212692A GB2212692A (en) | 1989-07-26 |
GB2212692B GB2212692B (en) | 1992-04-08 |
Family
ID=6343586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8830122A Expired - Lifetime GB2212692B (en) | 1987-12-24 | 1988-12-23 | Method and circuit for the black level control of a video signal |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE3744076C2 (en) |
FR (1) | FR2625397A1 (en) |
GB (1) | GB2212692B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2661060B1 (en) * | 1990-04-11 | 1996-02-23 | Telediffusion Fse | DEVICE FOR SUPPRESSING CLAMPING NOISE FROM A RECEIVING TV SIGNAL. |
JPH0449780A (en) * | 1990-06-18 | 1992-02-19 | Victor Co Of Japan Ltd | Video signal clamping circuit |
JP3047927B2 (en) * | 1991-04-09 | 2000-06-05 | 三菱電機株式会社 | Video signal clamp circuit |
DE4244867C2 (en) * | 1991-04-09 | 1996-01-18 | Mitsubishi Electric Corp | Video signal clamping circuit holding DC voltage at determined value |
DE4215668C2 (en) * | 1992-05-13 | 2003-06-12 | Thomson Brandt Gmbh | Clamp circuit for a digital video signal |
JPH066809A (en) * | 1992-06-16 | 1994-01-14 | Toshiba Corp | Picture signal processor |
US5659355A (en) * | 1994-10-31 | 1997-08-19 | Eastman Kodak Company | CCD dark mean level correction circuit employing digital processing and analog subtraction requiring no advance knowledge of dark mean level |
FR2755323A1 (en) * | 1996-10-25 | 1998-04-30 | Philips Electronics Nv | ANALOG / DIGITAL CONVERSION DEVICE |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2524748A1 (en) * | 1982-04-02 | 1983-10-07 | Thomson Csf | DIGITAL LEVEL ALIGNMENT CIRCUIT OF AN ANALOG SIGNAL |
US4562741A (en) * | 1984-04-20 | 1986-01-07 | Craig Hosterman | Pressure relief valve with pressure indicating means |
JPS6139625A (en) * | 1984-07-28 | 1986-02-25 | Victor Co Of Japan Ltd | Analog/digital converter |
JPS62230168A (en) * | 1986-03-31 | 1987-10-08 | Toshiba Corp | Digital television signal processing circuit |
-
1987
- 1987-12-24 DE DE19873744076 patent/DE3744076C2/en not_active Expired - Fee Related
-
1988
- 1988-08-31 FR FR8811398A patent/FR2625397A1/en not_active Withdrawn
- 1988-12-23 GB GB8830122A patent/GB2212692B/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3744076C2 (en) | 1995-05-11 |
GB2212692A (en) | 1989-07-26 |
FR2625397A1 (en) | 1989-06-30 |
DE3744076A1 (en) | 1989-07-13 |
GB2212692B (en) | 1992-04-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19981223 |