BE548420A - - Google Patents
Info
- Publication number
- BE548420A BE548420A BE548420DA BE548420A BE 548420 A BE548420 A BE 548420A BE 548420D A BE548420D A BE 548420DA BE 548420 A BE548420 A BE 548420A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/169—Systems operating in the time domain of the television signal
- H04N7/1693—Systems operating in the time domain of the television signal by displacing synchronisation signals relative to active picture signals or vice versa
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US513757A US2872507A (en) | 1955-06-07 | 1955-06-07 | System for translating a d. c. component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE548420A true BE548420A (xx) |
Family
ID=24044566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE548420D BE548420A (xx) | 1955-06-07 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2872507A (xx) |
| BE (1) | BE548420A (xx) |
| CH (1) | CH360711A (xx) |
| DE (1) | DE1200897B (xx) |
| GB (1) | GB820374A (xx) |
| NL (2) | NL113770C (xx) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4389671A (en) * | 1980-09-29 | 1983-06-21 | Harris Corporation | Digitally-controlled analog encrypton |
| US4638357A (en) * | 1984-01-20 | 1987-01-20 | Home Box Office, Inc. | Audio scrambler |
| GB2368492B (en) * | 2000-10-23 | 2004-02-18 | Nat Air Traffic Services Ltd | audio communications system with co-channel transmitters |
| US7986795B2 (en) * | 2007-02-09 | 2011-07-26 | Wing Hon Tsang | Method and apparatus for protecting media content against unauthorized duplication |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE881216C (de) * | 1942-05-27 | 1953-06-29 | Telefunken Gmbh | Einrichtung zum selbsttaetigen Schwundausgleich |
| FR936713A (fr) * | 1945-04-25 | 1948-07-28 | Thomson Houston Comp Francaise | Système de suppression de bruits en l'absence de porteuse |
| US2567545A (en) * | 1948-09-30 | 1951-09-11 | Zenith Radio Corp | Subscription-type television receiver |
| US2664460A (en) * | 1950-04-26 | 1953-12-29 | Zenith Radio Corp | Subscription type television system |
| BE504631A (xx) * | 1950-07-28 |
-
0
- NL NL207792D patent/NL207792A/xx unknown
- NL NL113770D patent/NL113770C/xx active
- BE BE548420D patent/BE548420A/xx unknown
-
1955
- 1955-06-07 US US513757A patent/US2872507A/en not_active Expired - Lifetime
-
1956
- 1956-06-04 DE DEZ5581A patent/DE1200897B/de active Pending
- 1956-06-06 CH CH360711D patent/CH360711A/de unknown
- 1956-06-07 GB GB17605/56A patent/GB820374A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL113770C (xx) | |
| US2872507A (en) | 1959-02-03 |
| DE1200897B (de) | 1965-09-16 |
| NL207792A (xx) | |
| CH360711A (de) | 1962-03-15 |
| GB820374A (en) | 1959-09-16 |