BE489203A - - Google Patents
Info
- Publication number
- BE489203A BE489203A BE489203DA BE489203A BE 489203 A BE489203 A BE 489203A BE 489203D A BE489203D A BE 489203DA BE 489203 A BE489203 A BE 489203A
- Authority
- BE
- Belgium
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
- H04N7/169—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
- H04N5/067—Arrangements or circuits at the transmitter end
- H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31345A US2673237A (en) | 1948-06-05 | 1948-06-05 | Subscriber transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE489203A true BE489203A (xx) |
Family
ID=21858919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE489203D BE489203A (xx) | 1948-06-05 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2673237A (xx) |
| BE (1) | BE489203A (xx) |
| CH (1) | CH280693A (xx) |
| FR (1) | FR986356A (xx) |
| GB (1) | GB672250A (xx) |
| NL (1) | NL89372C (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1338158C (en) * | 1982-07-15 | 1996-03-12 | John D. Lowry | Encryption and decryption (scrambling and unscrambling) of video signals |
| US4642688A (en) * | 1983-06-24 | 1987-02-10 | Scientific Atlanta, Inc. | Method and apparatus for creating encrypted and decrypted television signals |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2245428A (en) * | 1939-05-09 | 1941-06-10 | Du Mont Allen B Lab Inc | Television transmitting system |
| US2207048A (en) * | 1939-06-01 | 1940-07-09 | Du Mont Allen B Lab Inc | Television transmitting system |
| US2335278A (en) * | 1940-12-12 | 1943-11-30 | Press Wireless Inc | Keying control method and system |
| US2401441A (en) * | 1941-03-01 | 1946-06-04 | Rca Corp | Television system |
| US2471903A (en) * | 1941-12-31 | 1949-05-31 | Rca Corp | Vertical blanking circuit for television transmitter systems |
| US2405252A (en) * | 1942-07-22 | 1946-08-06 | Rca Corp | Secret communication system |
| US2350008A (en) * | 1942-07-30 | 1944-05-30 | Rca Corp | Facsimile apparatus |
| US2366358A (en) * | 1943-05-07 | 1945-01-02 | Rca Corp | Television amplifier circuit |
| US2490561A (en) * | 1946-06-20 | 1949-12-06 | Jr William Ussler | Television picture mixing circuit |
| US2487641A (en) * | 1946-09-07 | 1949-11-08 | Philco Corp | Electronic pointer for television images |
| US2510046A (en) * | 1947-04-18 | 1950-05-30 | Zenith Radio Corp | Radio-wire signaling system |
| US2547598A (en) * | 1947-09-13 | 1951-04-03 | Zenith Radio Corp | Subscription image transmission system and apparatus |
| US2526694A (en) * | 1947-11-18 | 1950-10-24 | Faximile Inc | Graphic privacy system |
| NL147062B (nl) * | 1948-07-21 | Prowse Co Ltd D H | Zaaginrichting. | |
| US2567545A (en) * | 1948-09-30 | 1951-09-11 | Zenith Radio Corp | Subscription-type television receiver |
| US2531974A (en) * | 1949-04-07 | 1950-11-28 | Zenith Radio Corp | Subscription type television transmitter |
-
0
- BE BE489203D patent/BE489203A/xx unknown
- NL NL89372D patent/NL89372C/xx active
-
1948
- 1948-06-05 US US31345A patent/US2673237A/en not_active Expired - Lifetime
-
1949
- 1949-04-28 GB GB11340/49A patent/GB672250A/en not_active Expired
- 1949-05-19 FR FR986356D patent/FR986356A/fr not_active Expired
- 1949-06-07 CH CH280693D patent/CH280693A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL89372C (xx) | |
| FR986356A (fr) | 1951-07-31 |
| GB672250A (en) | 1952-05-21 |
| US2673237A (en) | 1954-03-23 |
| CH280693A (de) | 1952-01-31 |