DE3574441D1 - Television picture and sound scrambler and method - Google Patents
Television picture and sound scrambler and methodInfo
- Publication number
- DE3574441D1 DE3574441D1 DE8585305620T DE3574441T DE3574441D1 DE 3574441 D1 DE3574441 D1 DE 3574441D1 DE 8585305620 T DE8585305620 T DE 8585305620T DE 3574441 T DE3574441 T DE 3574441T DE 3574441 D1 DE3574441 D1 DE 3574441D1
- Authority
- DE
- Germany
- Prior art keywords
- television picture
- scrambler
- sound
- sound scrambler
- television
- 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.)
- Expired
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
- H04N7/166—Passage/non-passage of the television signal, e.g. jamming, band suppression
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/661,091 US4682359A (en) | 1984-10-15 | 1984-10-15 | Television picture and sound scrambler and method |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3574441D1 true DE3574441D1 (en) | 1989-12-28 |
Family
ID=24652174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8585305620T Expired DE3574441D1 (en) | 1984-10-15 | 1985-08-07 | Television picture and sound scrambler and method |
Country Status (4)
Country | Link |
---|---|
US (1) | US4682359A (de) |
EP (1) | EP0178758B1 (de) |
JP (1) | JPS61159884A (de) |
DE (1) | DE3574441D1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61139176A (ja) * | 1984-12-10 | 1986-06-26 | Pioneer Electronic Corp | Catvの視聴制御装置 |
US5142574A (en) * | 1988-03-10 | 1992-08-25 | West Jr Lamar | Optimum amplitude and frequency of jamming carrier in interdiction program denial system |
US5303295A (en) * | 1988-03-10 | 1994-04-12 | Scientific-Atlanta, Inc. | Enhanced versatility of a program control by a combination of technologies |
US5014309A (en) * | 1988-03-10 | 1991-05-07 | Scientific-Atlanta, Inc. | Off-premises cable television channel interdiction method and apparatus |
US5287539A (en) * | 1988-03-10 | 1994-02-15 | Scientific-Atlanta, Inc. | Interdiction program denial system for jamming audio and video signals |
US5208854A (en) * | 1988-03-10 | 1993-05-04 | Scientific-Atlanta, Inc. | Picture carrier controlled automatic gain control circuit for cable television interdiction or jamming apparatus |
US5289541A (en) * | 1988-03-10 | 1994-02-22 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with constant blanking and variable dwell times |
US5323462A (en) * | 1988-03-10 | 1994-06-21 | Scientific-Atlanta, Inc. | CATV subscriber disconnect switch |
US5463689A (en) * | 1988-03-10 | 1995-10-31 | Scientific-Atlanta | Interdiction method and apparatus with random mode jamming |
US4912760A (en) * | 1988-03-10 | 1990-03-27 | Scientific Atlanta, Inc. | Off-premises cable television channel interdiction method and apparatus |
US4951315A (en) * | 1988-12-30 | 1990-08-21 | Switsen Henry N | Video signal noise evaluation and removal circuit |
US5317635A (en) * | 1992-06-10 | 1994-05-31 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with mode control for variable frequency elements |
WO1993026127A1 (en) * | 1992-06-10 | 1993-12-23 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with direct memory control of variable frequency elements |
US5278908A (en) * | 1992-06-10 | 1994-01-11 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with programmable jamming effectiveness |
WO1993026126A1 (en) * | 1992-06-10 | 1993-12-23 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with frequency change inhibit function |
US6070061A (en) * | 1997-10-03 | 2000-05-30 | Zenith Electronics Corporation | Adjacent channel rejection in double conversion tuner |
KR20030009966A (ko) * | 2001-07-24 | 2003-02-05 | 정일영 | Tv 채널 자가 스크램블 장치 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3175033A (en) * | 1960-08-26 | 1965-03-23 | Isaac S Blonder | Television receiver control using filter for carrier removal |
US3202758A (en) * | 1961-11-09 | 1965-08-24 | Paramount Pictures Corp | Subscription-television programscrambling system |
US3813482A (en) * | 1972-07-24 | 1974-05-28 | Blonder Tongue Lab | Method of and apparatus for scramble-encoded transmission and decoded reception for over the air and cable subscription television and the like |
US4085422A (en) * | 1973-10-31 | 1978-04-18 | Hokuryo Denko Co., Ltd. | Fee-charging apparatus for television sets |
US4268860A (en) * | 1974-09-25 | 1981-05-19 | Blonder-Tongue Laboratories, Inc. | Television subscriber apparatus |
US4039954A (en) * | 1975-05-27 | 1977-08-02 | Oak Holland B.V. | Signal distribution device for a cable television |
US4074311A (en) * | 1976-06-18 | 1978-02-14 | Tanner Electronic Systems | Television security system |
US4095258A (en) * | 1976-10-15 | 1978-06-13 | Blonder-Tongue Laboratories, Inc. | Apparatus for decoding scrambled television and similar transmissions |
US4163252A (en) * | 1976-11-03 | 1979-07-31 | Blonder-Tongue Laboratories, Inc. | Subscription television decoder apparatus |
US4222067A (en) * | 1978-06-23 | 1980-09-09 | Stern Joseph L | Tamper-resistant television signal scrambling |
JPS5539444A (en) * | 1978-09-13 | 1980-03-19 | Pioneer Electronic Corp | Scramble/descramble system for catv broadcast |
DE3125767A1 (de) * | 1980-07-05 | 1982-06-09 | Communications Patents Ltd., London | Kabelfernsehsystem |
-
1984
- 1984-10-15 US US06/661,091 patent/US4682359A/en not_active Expired - Fee Related
-
1985
- 1985-08-07 EP EP85305620A patent/EP0178758B1/de not_active Expired
- 1985-08-07 DE DE8585305620T patent/DE3574441D1/de not_active Expired
- 1985-10-04 JP JP60221703A patent/JPS61159884A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US4682359A (en) | 1987-07-21 |
JPS61159884A (ja) | 1986-07-19 |
EP0178758B1 (de) | 1989-11-23 |
EP0178758A1 (de) | 1986-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |