DE1073028B - Druz Bensenville, 111 Howard K van Jepmond Evanston, 111 , und Jack E Bridges Franklin Park 111 (V St A) I Teilnehmerfernseh anlage zur Schlusselung eines Fernseh signals - Google Patents
Druz Bensenville, 111 Howard K van Jepmond Evanston, 111 , und Jack E Bridges Franklin Park 111 (V St A) I Teilnehmerfernseh anlage zur Schlusselung eines Fernseh signalsInfo
- Publication number
- DE1073028B DE1073028B DE1955Z0004656 DEZ0004656A DE1073028B DE 1073028 B DE1073028 B DE 1073028B DE 1955Z0004656 DE1955Z0004656 DE 1955Z0004656 DE Z0004656 A DEZ0004656 A DE Z0004656A DE 1073028 B DE1073028 B DE 1073028B
- Authority
- DE
- Germany
- Prior art keywords
- signal
- coding
- signal components
- changeover
- curve
- 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.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 claims description 32
- 230000000737 periodic effect Effects 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 17
- 230000001052 transient effect Effects 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 230000002123 temporal effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- 230000006870 function Effects 0.000 description 45
- 230000007246 mechanism Effects 0.000 description 25
- 238000010894 electron beam technology Methods 0.000 description 19
- 239000003990 capacitor Substances 0.000 description 17
- 239000004020 conductor Substances 0.000 description 17
- 230000000903 blocking effect Effects 0.000 description 12
- 230000000875 corresponding effect Effects 0.000 description 11
- 230000001360 synchronised effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 235000013601 eggs Nutrition 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009416 shuttering Methods 0.000 description 1
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/006—Secret communication by varying or inverting the phase, at periodic or random intervals
-
- 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)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Television Systems (AREA)
- Noise Elimination (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB36022/54A GB796858A (en) | 1954-12-13 | 1954-12-13 | Improvements in or relating to subscription television system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1073028B true DE1073028B (de) | 1960-01-14 |
Family
ID=10384097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1955Z0004656 Pending DE1073028B (de) | 1954-12-13 | 1955-01-07 | Druz Bensenville, 111 Howard K van Jepmond Evanston, 111 , und Jack E Bridges Franklin Park 111 (V St A) I Teilnehmerfernseh anlage zur Schlusselung eines Fernseh signals |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2910526A (enExample) |
| BE (1) | BE534753A (enExample) |
| CH (1) | CH342258A (enExample) |
| DE (1) | DE1073028B (enExample) |
| FR (1) | FR1120543A (enExample) |
| GB (2) | GB796858A (enExample) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2972009A (en) * | 1957-08-01 | 1961-02-14 | Zenith Radio Corp | Subscription television system |
| US2926214A (en) * | 1957-09-26 | 1960-02-23 | Zenith Radio Corp | Subscription television system |
| FR2486746A1 (fr) * | 1980-07-11 | 1982-01-15 | Telediffusion Fse | Procede de brouillage et de debrouillage d'images de television |
| US4636852A (en) * | 1984-01-26 | 1987-01-13 | Scientific-Atlanta, Inc. | Scrambling and descrambling of television signals for subscription TV |
| US4916736A (en) * | 1988-06-07 | 1990-04-10 | Macrovision Corporation | Method and apparatus for encrypting and decrypting time domain signals |
| US5058157A (en) * | 1989-09-06 | 1991-10-15 | Macrovision Corporation | Method and apparatus for encrypting and decrypting time domain signals |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2697741A (en) * | 1953-04-29 | 1954-12-21 | Zenith Radio Corp | Subscription television system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2656407A (en) * | 1949-02-12 | 1953-10-20 | Zenith Radio Corp | Subscriber signaling system |
| US2619530A (en) * | 1949-11-19 | 1952-11-25 | Zenith Radio Corp | Control system for subscription type television receivers |
| US2816156A (en) * | 1951-06-08 | 1957-12-10 | Zenith Radio Corp | Subscription television system |
-
1953
- 1953-07-24 US US370174A patent/US2910526A/en not_active Expired - Lifetime
-
1954
- 1954-12-13 GB GB36022/54A patent/GB796858A/en not_active Expired
- 1954-12-13 GB GB12670/56A patent/GB796859A/en not_active Expired
-
1955
- 1955-01-07 DE DE1955Z0004656 patent/DE1073028B/de active Pending
- 1955-01-10 FR FR1120543D patent/FR1120543A/fr not_active Expired
- 1955-01-10 BE BE534753D patent/BE534753A/xx unknown
- 1955-01-11 CH CH342258D patent/CH342258A/de unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2697741A (en) * | 1953-04-29 | 1954-12-21 | Zenith Radio Corp | Subscription television system |
Also Published As
| Publication number | Publication date |
|---|---|
| US2910526A (en) | 1959-10-27 |
| GB796858A (en) | 1958-06-18 |
| FR1120543A (fr) | 1956-07-09 |
| CH342258A (de) | 1959-11-15 |
| GB796859A (en) | 1958-06-18 |
| BE534753A (enExample) | 1958-10-10 |
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