IT454079A - - Google Patents
Info
- Publication number
- IT454079A IT454079A IT454079DA IT454079A IT 454079 A IT454079 A IT 454079A IT 454079D A IT454079D A IT 454079DA IT 454079 A IT454079 A IT 454079A
- Authority
- IT
- Italy
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/165—Centralised control of user terminal ; Registering at central
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Television Systems (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36778A US2656406A (en) | 1948-07-02 | 1948-07-02 | Subscriber television system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT454079A true IT454079A (US07608600-20091027-C00054.png) |
Family
ID=21890599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT454079D IT454079A (US07608600-20091027-C00054.png) | 1948-07-02 |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US2656406A (US07608600-20091027-C00054.png) |
| FR (2) | FR989540A (US07608600-20091027-C00054.png) |
| GB (1) | GB670442A (US07608600-20091027-C00054.png) |
| IT (1) | IT454079A (US07608600-20091027-C00054.png) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2769023A (en) * | 1950-01-19 | 1956-10-30 | Internat Telemeter Corp | Prepaid entertainment distribution system |
| US2881244A (en) * | 1951-08-30 | 1959-04-07 | Zenith Radio Corp | Subscriber television system with code reset bursts in audio channel |
| US2839598A (en) * | 1951-10-06 | 1958-06-17 | Zenith Radio Corp | Subscription television system |
| US2847501A (en) * | 1952-02-06 | 1958-08-12 | Zenith Radio Corp | Subscription television system |
| BE519070A (US07608600-20091027-C00054.png) * | 1952-04-09 | |||
| NL178869B (nl) * | 1952-06-04 | Hoechst Ag | Werkwijze voor het bereiden van 5-oxohexaannitrile. | |
| US2913518A (en) * | 1953-01-02 | 1959-11-17 | Zenith Radio Corp | Subscription television |
| US2846497A (en) * | 1953-03-05 | 1958-08-05 | Rca Corp | Television systems |
| US2883526A (en) * | 1953-03-11 | 1959-04-21 | Zenith Radio Corp | Subscription television control circuit |
| US2852598A (en) * | 1953-07-08 | 1958-09-16 | Zenith Radio Corp | Subscription television system |
| US2905747A (en) * | 1953-09-22 | 1959-09-22 | Rca Corp | Secrecy systems |
| US2892882A (en) * | 1955-02-21 | 1959-06-30 | Paramount Pictures Corp | Television secrecy system with width modulated synchronizing pulses |
| US2910527A (en) * | 1955-06-07 | 1959-10-27 | Zenith Radio Corp | System for translating a d. c. component |
| US2875270A (en) * | 1955-06-07 | 1959-02-24 | Internat Telemeter Corp | Subscription-television system |
| US2999900A (en) * | 1957-05-27 | 1961-09-12 | Zenith Radio Corp | Signal translating apparatus |
| US2954423A (en) * | 1957-12-05 | 1960-09-27 | Zenith Radio Corp | Subscription television |
| US4358857A (en) * | 1958-05-09 | 1982-11-09 | The Magnavox Company | Communication system |
| US4638357A (en) * | 1984-01-20 | 1987-01-20 | Home Box Office, Inc. | Audio scrambler |
| US5029207A (en) * | 1990-02-01 | 1991-07-02 | Scientific-Atlanta, Inc. | External security module for a television signal decoder |
| US5237610A (en) * | 1990-02-01 | 1993-08-17 | Scientific-Atlanta, Inc. | Independent external security module for a digitally upgradeable television signal decoder |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1790486A (en) * | 1931-01-27 | Broadcasting system | ||
| US1522359A (en) * | 1925-01-06 | District imf colum | ||
| US1310719A (en) * | 1919-07-22 | Secret signaling system | ||
| US1356546A (en) * | 1918-12-04 | 1920-10-26 | American Telephone & Telegraph | Ciphering system |
| US1754876A (en) * | 1924-02-09 | 1930-04-15 | Edward F Colladay | Regional system of radio broadcast distribution |
| US1706379A (en) * | 1925-11-25 | 1929-03-19 | Edward F Colladay | Radio broadcast distributing system |
| GB386849A (en) * | 1931-05-09 | 1933-01-26 | Siegmund Loewe | Improvements in and relating to television systems |
| US2210012A (en) * | 1934-01-27 | 1940-08-06 | Urlyn C Tainton | Communication system |
| FR809489A (fr) * | 1935-11-27 | 1937-03-03 | Perfectionnement aux systèmes de synchronisation destinés notamment à la réception des images en télévision | |
| US2136789A (en) * | 1936-06-16 | 1938-11-15 | William G H Finch | Telepicture electro-optical system |
| US2237533A (en) * | 1938-11-23 | 1941-04-08 | Rca Corp | Secrecy and motor control device |
| GB530776A (en) * | 1939-03-06 | 1940-12-20 | Scophony Ltd | Improvements in or relating to the secret transmission of television and like signals |
| US2403059A (en) * | 1940-05-11 | 1946-07-02 | Times Telephoto Equipment Inc | Secrecy telefacsimile system |
| US2310197A (en) * | 1940-12-21 | 1943-02-02 | Rca Corp | Television system |
| US2402058A (en) * | 1941-06-25 | 1946-06-11 | Hazeltine Research Inc | Secrecy communication system |
| US2402067A (en) * | 1941-10-30 | 1946-06-11 | Rca Corp | Device for secret communication |
| CH227464A (de) * | 1942-01-29 | 1943-06-15 | Patelhold Patentverwertung | Verfahren zur Übermittlung von Nachrichten, die mit Hilfe von Steuersignalen verschleiert werden. |
| US2405252A (en) * | 1942-07-22 | 1946-08-06 | Rca Corp | Secret communication system |
| US2403540A (en) * | 1943-04-23 | 1946-07-09 | Rca Corp | Reciprocal circuit |
| US2414101A (en) * | 1943-06-04 | 1947-01-14 | Faximile Inc | Graphic privacy system |
| US2472774A (en) * | 1945-10-17 | 1949-06-07 | Farnsworth Res Corp | Irregular interlace scanning system |
| US2510046A (en) * | 1947-04-18 | 1950-05-30 | Zenith Radio Corp | Radio-wire signaling system |
-
0
- IT IT454079D patent/IT454079A/it unknown
-
1948
- 1948-07-02 US US36778A patent/US2656406A/en not_active Expired - Lifetime
-
1949
- 1949-05-21 US US94643A patent/US2656408A/en not_active Expired - Lifetime
- 1949-05-23 GB GB13691/49A patent/GB670442A/en not_active Expired
- 1949-06-24 FR FR989540D patent/FR989540A/fr not_active Expired
- 1949-06-24 FR FR989539D patent/FR989539A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2656406A (en) | 1953-10-20 |
| FR989539A (fr) | 1951-09-10 |
| FR989540A (fr) | 1951-09-10 |
| US2656408A (en) | 1953-10-20 |
| GB670442A (en) | 1952-04-16 |
