NL238566A - - Google Patents
Info
- Publication number
- NL238566A NL238566A NL238566A NL238566A NL238566A NL 238566 A NL238566 A NL 238566A NL 238566 A NL238566 A NL 238566A NL 238566 A NL238566 A NL 238566A NL 238566 A NL238566 A NL 238566A
- Authority
- NL
- Netherlands
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
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/171—Systems operating in the amplitude domain of the television signal
- H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals
-
- 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
- H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Systems (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US742114A US3001011A (en) | 1958-06-16 | 1958-06-16 | Subscription television system |
| US21937562A | 1962-08-23 | 1962-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL238566A true NL238566A (enExample) | 1964-02-05 |
Family
ID=26913828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL238566A NL238566A (enExample) | 1958-06-16 | 1959-04-24 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US3001011A (enExample) |
| JP (1) | JPS523248B1 (enExample) |
| DE (1) | DE1412135A1 (enExample) |
| FR (1) | FR1239340A (enExample) |
| GB (2) | GB922183A (enExample) |
| NL (1) | NL238566A (enExample) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3201511A (en) * | 1960-07-20 | 1965-08-17 | Teleglobe Pay Tv System Inc | Subscription television system having keyed generation of sync signals at the receiver |
| US3184537A (en) * | 1960-10-04 | 1965-05-18 | Paramount Pictures Corp | Subscription-television system employing suppression of synchronizing signals |
| US3530232A (en) * | 1966-06-17 | 1970-09-22 | Intern Telemeter Corp | Subscription television system |
| US3601528A (en) * | 1969-06-16 | 1971-08-24 | Coaxial Scient Corp | Television communications system with coding and decoding |
| US3896262A (en) * | 1974-03-21 | 1975-07-22 | Hughes Aircraft Co | Subscription television jamming system |
| JPS5210817U (enExample) * | 1975-07-09 | 1977-01-25 | ||
| CA1338158C (en) * | 1982-07-15 | 1996-03-12 | John D. Lowry | Encryption and decryption (scrambling and unscrambling) of video signals |
| US4636853A (en) * | 1983-12-21 | 1987-01-13 | Zenith Electronics Corporation | Dynamic audio scrambling system |
| US4956862A (en) | 1989-02-02 | 1990-09-11 | General Instrument Corporation | Method of providing sound privacy system compatible with mono and btsc stereo audio |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2510046A (en) * | 1947-04-18 | 1950-05-30 | Zenith Radio Corp | Radio-wire signaling system |
| US2567539A (en) * | 1948-06-25 | 1951-09-11 | Zenith Radio Corp | Subscriber television system |
| US2769024A (en) * | 1950-10-09 | 1956-10-30 | Internat Telementer Corp | Television control system |
| US2843655A (en) * | 1951-12-03 | 1958-07-15 | Internat Telemeter Corp | Subscription television with scrambled transmission and marquee and barker |
| US2864885A (en) * | 1951-12-08 | 1958-12-16 | Zenith Radio Corp | Subscriber television system |
| USRE25837E (en) * | 1952-04-09 | 1965-08-10 | Morris etal subscription television system | |
| US2875270A (en) * | 1955-06-07 | 1959-02-24 | Internat Telemeter Corp | Subscription-television system |
| US2907816A (en) * | 1958-02-21 | 1959-10-06 | Paramount Pictures Corp | Subscription television system |
-
1958
- 1958-06-16 US US742114A patent/US3001011A/en not_active Expired - Lifetime
-
1959
- 1959-04-13 GB GB12409/59A patent/GB922183A/en not_active Expired
- 1959-04-13 GB GB2035/61A patent/GB922184A/en not_active Expired
- 1959-04-24 DE DE19591412135 patent/DE1412135A1/de active Pending
- 1959-04-24 FR FR793211A patent/FR1239340A/fr not_active Expired
- 1959-04-24 NL NL238566A patent/NL238566A/xx unknown
- 1959-04-25 JP JP34013180A patent/JPS523248B1/ja active Pending
-
1962
- 1962-08-23 US US27046D patent/USRE27046E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1239340A (fr) | 1960-08-26 |
| GB922184A (en) | 1963-03-27 |
| DE1412135A1 (de) | 1969-03-06 |
| JPS523248B1 (enExample) | 1977-01-27 |
| USRE27046E (en) | 1971-02-02 |
| US3001011A (en) | 1961-09-19 |
| GB922183A (en) | 1963-03-27 |