SE9603381L - Förfarande och anordning för att koda kabeltelevision - Google Patents
Förfarande och anordning för att koda kabeltelevisionInfo
- Publication number
- SE9603381L SE9603381L SE9603381A SE9603381A SE9603381L SE 9603381 L SE9603381 L SE 9603381L SE 9603381 A SE9603381 A SE 9603381A SE 9603381 A SE9603381 A SE 9603381A SE 9603381 L SE9603381 L SE 9603381L
- Authority
- SE
- Sweden
- Prior art keywords
- oscillators
- cable television
- jamming
- control
- switched
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/41—Jamming having variable characteristics characterized by the control of the jamming activation or deactivation time
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K2203/00—Jamming of communication; Countermeasures
- H04K2203/10—Jamming or countermeasure used for a particular application
- H04K2203/14—Jamming or countermeasure used for a particular application for the transfer of light or images, e.g. for video-surveillance, for television or from a computer screen
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Systems (AREA)
- Noise Elimination (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9603381A SE507718C2 (sv) | 1996-09-13 | 1996-09-13 | Förfarande och anordning för att koda kabeltelevision |
PCT/SE1997/001513 WO1998011725A1 (en) | 1996-09-13 | 1997-09-09 | Method and apparatus for coding cable television |
AU43245/97A AU4324597A (en) | 1996-09-13 | 1997-09-09 | Method and apparatus for coding cable television |
US08/928,967 US6104814A (en) | 1996-09-13 | 1997-09-12 | Method and apparatus for jamming different television channels using an oscillator circuit oscillating at different frequency bands |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9603381A SE507718C2 (sv) | 1996-09-13 | 1996-09-13 | Förfarande och anordning för att koda kabeltelevision |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9603381D0 SE9603381D0 (sv) | 1996-09-13 |
SE9603381L true SE9603381L (sv) | 1998-03-14 |
SE507718C2 SE507718C2 (sv) | 1998-07-06 |
Family
ID=20403911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9603381A SE507718C2 (sv) | 1996-09-13 | 1996-09-13 | Förfarande och anordning för att koda kabeltelevision |
Country Status (4)
Country | Link |
---|---|
US (1) | US6104814A (sv) |
AU (1) | AU4324597A (sv) |
SE (1) | SE507718C2 (sv) |
WO (1) | WO1998011725A1 (sv) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7883417B2 (en) * | 2000-04-07 | 2011-02-08 | Igt | Gaming machine communicating system |
GB0504632D0 (en) * | 2005-03-05 | 2005-04-13 | Technetix Plc | Method and apparatus for determining signal paths within a cable network |
US10264317B2 (en) * | 2016-09-28 | 2019-04-16 | T-Mobile Usa, Inc. | Content access device geolocation verification |
US20230254060A1 (en) * | 2020-07-02 | 2023-08-10 | Nippon Telegraph And Telephone Corporation | Communication network terminating device, communication system, signal jamming method and signal jamming program |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60245385A (ja) * | 1984-05-18 | 1985-12-05 | Pioneer Electronic Corp | Catvシステムにおける集中視聴制御方式 |
US5467397A (en) * | 1988-03-10 | 1995-11-14 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with variable dwell time |
US5287539A (en) * | 1988-03-10 | 1994-02-15 | Scientific-Atlanta, Inc. | Interdiction program denial system for jamming audio and video signals |
US4912760A (en) * | 1988-03-10 | 1990-03-27 | Scientific Atlanta, Inc. | Off-premises cable television channel interdiction method and apparatus |
US5140633A (en) * | 1991-03-22 | 1992-08-18 | North American Philips Corporation | Cable subscriber control device using shared jamming modules |
JPH0575349A (ja) * | 1991-09-11 | 1993-03-26 | Pioneer Electron Corp | 発振装置 |
US5278908A (en) * | 1992-06-10 | 1994-01-11 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with programmable jamming effectiveness |
US5371417A (en) * | 1993-07-02 | 1994-12-06 | Tandem Computers Incorporated | Multiple frequency output clock generator system |
CA2104202C (en) * | 1993-08-16 | 1998-08-25 | Pierre Blais | Method and apparatus for multi-tier time shared catv jamming |
-
1996
- 1996-09-13 SE SE9603381A patent/SE507718C2/sv unknown
-
1997
- 1997-09-09 WO PCT/SE1997/001513 patent/WO1998011725A1/en active Application Filing
- 1997-09-09 AU AU43245/97A patent/AU4324597A/en not_active Abandoned
- 1997-09-12 US US08/928,967 patent/US6104814A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU4324597A (en) | 1998-04-02 |
WO1998011725A1 (en) | 1998-03-19 |
SE9603381D0 (sv) | 1996-09-13 |
SE507718C2 (sv) | 1998-07-06 |
US6104814A (en) | 2000-08-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3899633A (en) | Subscription television system | |
US4494138A (en) | Segmented upstream management for cable television | |
US3859457A (en) | Selective video reception inhibiting apparatus | |
PT894369E (pt) | Distribuicao de sinais de radiofrequencia atraves de infraestruturas com largura de banda reduzida | |
CA1164991A (en) | Video signal coding by video signal polarity reversal on the basis of brightness level comparison | |
ATE250313T1 (de) | Interaktives hausinformationssystem | |
EP0178758B1 (en) | Television picture and sound scrambler and method | |
US3826863A (en) | Subscription television system using audio and video carrier reversal | |
SE9603381L (sv) | Förfarande och anordning för att koda kabeltelevision | |
DK0382675T3 (da) | FM-modtager og kommunikationssystem med en sådan modtager | |
US4216500A (en) | Encoding and decoding system | |
JPS5539440A (en) | Tuning system of terminal unit for catv system | |
KR890004493A (ko) | 안테나 신호 분배회로 | |
US4398214A (en) | Wired television broadcasting system | |
DE69421648D1 (de) | Phasemodulierende Sendevorrichtung für Videosignalverteilsysteme | |
US3919463A (en) | Pay TV system using UHF input | |
KR920011277A (ko) | 위성 방송 수신 장치 | |
US4683565A (en) | Phase controlled frequency division multiplexed communications system | |
ATE185658T1 (de) | Verbesserungen bei rundfunksignalbehandlung | |
GB2312803A (en) | Television camera security system | |
JPS60245386A (ja) | Catvシステムにおける集中視聴制御方式 | |
AU3111197A (en) | An arrangement relating to electronic alarm systems that deliver control signals such as to displace the system transmission frequency and therewith avoid disturbances | |
JPS6476558A (en) | Video signal recorder | |
DE2638888A1 (de) | Mikrowellen-uebertragungssystem im ghz-bereich | |
GB823506A (en) | Improvements in or relating to wired broadcasting systems |