CN1033784C - 遮断节目拒收系统中干扰载波的最佳幅度和频率 - Google Patents
遮断节目拒收系统中干扰载波的最佳幅度和频率 Download PDFInfo
- Publication number
- CN1033784C CN1033784C CN90109929A CN90109929A CN1033784C CN 1033784 C CN1033784 C CN 1033784C CN 90109929 A CN90109929 A CN 90109929A CN 90109929 A CN90109929 A CN 90109929A CN 1033784 C CN1033784 C CN 1033784C
- Authority
- CN
- China
- Prior art keywords
- frequency
- oscillator
- microprocessor
- channel
- cable
- 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 - Lifetime
Links
Images
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
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- 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
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
-
- 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
- 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
-
- 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)
- Devices For Executing Special Programs (AREA)
Abstract
Description
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/446,602 US5142574A (en) | 1988-03-10 | 1989-12-06 | Optimum amplitude and frequency of jamming carrier in interdiction program denial system |
US446,602 | 1989-12-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1053342A CN1053342A (zh) | 1991-07-24 |
CN1033784C true CN1033784C (zh) | 1997-01-08 |
Family
ID=23773200
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN90109929A Expired - Lifetime CN1033784C (zh) | 1989-12-06 | 1990-12-06 | 遮断节目拒收系统中干扰载波的最佳幅度和频率 |
Country Status (8)
Country | Link |
---|---|
US (1) | US5142574A (zh) |
EP (1) | EP0504259A4 (zh) |
JP (1) | JPH05502349A (zh) |
KR (1) | KR100274725B1 (zh) |
CN (1) | CN1033784C (zh) |
AU (1) | AU655163B2 (zh) |
CA (1) | CA2071500C (zh) |
WO (1) | WO1991008651A1 (zh) |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5505901A (en) * | 1988-03-10 | 1996-04-09 | Scientific-Atlanta, Inc. | CATV pay per view interdiction system method and apparatus |
US5463689A (en) * | 1988-03-10 | 1995-10-31 | Scientific-Atlanta | Interdiction method and apparatus with random mode jamming |
US5289541A (en) * | 1988-03-10 | 1994-02-22 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with constant blanking and variable dwell times |
DK0559802T3 (da) * | 1990-11-27 | 1999-11-22 | Blonder Tongue Lab | CATV betalings/forbudssystem, fremgangsmåde og apparat |
US8352400B2 (en) | 1991-12-23 | 2013-01-08 | Hoffberg Steven M | Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore |
US7006881B1 (en) * | 1991-12-23 | 2006-02-28 | Steven Hoffberg | Media recording device with remote graphic user interface |
US5309514A (en) * | 1992-06-01 | 1994-05-03 | Scientific-Atlanta, Inc. | Pulse generator including a memory for storing pulses for modulation on a carrier of a television signal |
WO1993026126A1 (en) * | 1992-06-10 | 1993-12-23 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with frequency change inhibit function |
WO1993026127A1 (en) * | 1992-06-10 | 1993-12-23 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with direct memory control of variable frequency elements |
US5243647A (en) * | 1992-06-10 | 1993-09-07 | Scientific-Atlanta, Inc. | Method and apparatus for broadband signal distribution |
US5278908A (en) * | 1992-06-10 | 1994-01-11 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with programmable jamming effectiveness |
US5317635A (en) * | 1992-06-10 | 1994-05-31 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with mode control for variable frequency elements |
US5265160A (en) * | 1992-06-10 | 1993-11-23 | Scientific-Atlanta, Inc. | Interdiction method and apparatus with pulsed mode jamming |
US5396642A (en) * | 1992-08-14 | 1995-03-07 | Electroline Equipment Inc. | Variable frequency CATV jamming method and apparatus |
EP0583869A1 (en) * | 1992-08-14 | 1994-02-23 | Electroline Equipment Inc | Variable frequency CATV jamming method and apparatus |
RO111887B1 (ro) * | 1993-05-28 | 1997-02-28 | Us West Technologies Inc | Metoda si retea pentru separarea serviciilor telefonice de serviciile speciale |
US5615246A (en) * | 1993-05-28 | 1997-03-25 | Us West Technologies, Inc. | Method and apparatus for spurious signal detection and disconnection in a hybrid fiber/coax network architecture |
US5592540A (en) * | 1993-05-28 | 1997-01-07 | U S West Advanced Technologies, Inc. | Method and apparatus for selectively delivering telephony signals on a hybrid coaxial cable network |
CA2104202C (en) * | 1993-08-16 | 1998-08-25 | Pierre Blais | Method and apparatus for multi-tier time shared catv jamming |
US5671278A (en) * | 1995-05-19 | 1997-09-23 | Pires; H. George | Video scrambling with variable function generator |
US6188870B1 (en) | 1996-10-07 | 2001-02-13 | General Instrument Corporation | Passive interdiction system for scrambling |
US7966078B2 (en) | 1999-02-01 | 2011-06-21 | Steven Hoffberg | Network media appliance system and method |
KR100543583B1 (ko) * | 2003-01-29 | 2006-01-20 | 주식회사 미래콤 | 비디오 스크램블러 및 디스크램블러 |
US7162234B1 (en) | 2003-05-20 | 2007-01-09 | Mark J. Smith | Wireless communication device |
US8767595B2 (en) * | 2005-08-02 | 2014-07-01 | L-3 Communications Corporation | Enhanced methods of cellular environment detection when interoperating with timed interfers |
WO2007016641A2 (en) * | 2005-08-02 | 2007-02-08 | Comhouse Wireless, Lp | Methods of remotely identifying, suppressing and/or disabling wireless devices of interest |
US7962113B2 (en) * | 2005-10-31 | 2011-06-14 | Silicon Laboratories Inc. | Receiver with multi-tone wideband I/Q mismatch calibration and method therefor |
US7995981B2 (en) * | 2005-10-31 | 2011-08-09 | Silicon Laboratories Inc. | Receiver with image rejection calibration at an undesired picture carrier and method therefor |
US8140001B2 (en) | 2006-03-07 | 2012-03-20 | L-3 Communications Corporation | Methods of suppressing GSM wireless device threats in dynamic or wide area static environments using minimal power and collateral interference |
US8755770B2 (en) * | 2006-08-01 | 2014-06-17 | L-3 Communications Corporation | Methods for identifying wireless devices connected to potentially threatening devices |
US20100226308A1 (en) * | 2006-08-15 | 2010-09-09 | Comhouse Wireless Lp | node- arbitrated media access control protocol for ad hoc broadcast networks carrying ephemeral information |
US8132222B2 (en) * | 2007-11-20 | 2012-03-06 | Commscope, Inc. Of North Carolina | Addressable tap units for cable television networks and related methods of remotely controlling bandwidth allocation in such networks |
US8477727B2 (en) * | 2009-07-29 | 2013-07-02 | L-3 Communications Corporation | Methods for surreptitious manipulation of CDMA 2000 wireless devices |
US8526395B2 (en) * | 2009-09-04 | 2013-09-03 | L-3 Communications Corporation | Using code channel overrides to suppress CDMA wireless devices |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3202758A (en) * | 1961-11-09 | 1965-08-24 | Paramount Pictures Corp | Subscription-television programscrambling system |
US3899633A (en) * | 1972-05-12 | 1975-08-12 | Columbia Pictures Ind Inc | Subscription television system |
US3760097A (en) * | 1972-06-26 | 1973-09-18 | Hughes Aircraft Co | Adjacent catv channel jamming |
US3896262A (en) * | 1974-03-21 | 1975-07-22 | Hughes Aircraft Co | Subscription television jamming system |
USRE29997E (en) * | 1974-12-24 | 1979-05-15 | Oak Holland, B.V. | Signal distribution device for a cable television |
US4039954A (en) * | 1975-05-27 | 1977-08-02 | Oak Holland B.V. | Signal distribution device for a cable television |
GB1554411A (en) * | 1975-08-09 | 1979-10-17 | Communications Patents Ltd | Control systems |
US3989887A (en) * | 1975-08-28 | 1976-11-02 | Gte Laboratories Incorporated | Swept frequency trap jammer for secure television system |
US4148064A (en) * | 1978-01-09 | 1979-04-03 | Gte Sylvania Incorporated | Jamming circuit for television signals |
US4343042A (en) * | 1979-07-10 | 1982-08-03 | Cablebus Systems Corporation | Bi-directional data transmission and control system |
US4334322A (en) * | 1979-10-26 | 1982-06-08 | E-Systems, Inc. | Communication management system for providing antijam/privacy capabilities for voice radio communications |
US4326289A (en) * | 1980-02-28 | 1982-04-20 | Dickinson Robert V C | Expandable communication system |
US4434436A (en) * | 1981-07-13 | 1984-02-28 | Bruce Merrill | Addressable premium channel obfuscation device for cable television systems |
US4450481A (en) * | 1981-08-25 | 1984-05-22 | E-Com Corporation | Tamper-resistant, expandable communications system |
NL8301943A (nl) * | 1982-07-01 | 1984-02-01 | Plessey Overseas | Zender. |
JPS5961384A (ja) * | 1982-09-30 | 1984-04-07 | Nec Home Electronics Ltd | Catvシステム用ジヤミング信号発生装置 |
US4521809A (en) * | 1982-12-29 | 1985-06-04 | North American Philips Corporation | Method and apparatus for controlling access to selected television programs |
US4682359A (en) * | 1984-10-15 | 1987-07-21 | Blonder-Tongue Laboratories, Inc. | Television picture and sound scrambler and method |
JPS61139176A (ja) * | 1984-12-10 | 1986-06-26 | Pioneer Electronic Corp | Catvの視聴制御装置 |
US4910791A (en) * | 1985-12-26 | 1990-03-20 | Am Communications, Inc. | Monitoring and control of data communications |
US4748667A (en) * | 1986-11-04 | 1988-05-31 | Scientific Atlanta | Jamming signal scrambling and descrambling systems for CATV |
US4825467A (en) * | 1986-11-25 | 1989-04-25 | International Telesystems, Inc. | Restricted access television transmission system |
US4912760A (en) * | 1988-03-10 | 1990-03-27 | Scientific Atlanta, Inc. | Off-premises cable television channel interdiction method and apparatus |
-
1989
- 1989-12-06 US US07/446,602 patent/US5142574A/en not_active Expired - Lifetime
-
1990
- 1990-12-06 CN CN90109929A patent/CN1033784C/zh not_active Expired - Lifetime
- 1990-12-06 EP EP19910901140 patent/EP0504259A4/en not_active Withdrawn
- 1990-12-06 AU AU69580/91A patent/AU655163B2/en not_active Expired - Fee Related
- 1990-12-06 JP JP3501613A patent/JPH05502349A/ja not_active Withdrawn
- 1990-12-06 WO PCT/US1990/007185 patent/WO1991008651A1/en not_active Application Discontinuation
- 1990-12-06 CA CA002071500A patent/CA2071500C/en not_active Expired - Fee Related
-
1992
- 1992-06-05 KR KR1019920701352A patent/KR100274725B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR920704517A (ko) | 1992-12-19 |
CN1053342A (zh) | 1991-07-24 |
AU655163B2 (en) | 1994-12-08 |
US5142574A (en) | 1992-08-25 |
WO1991008651A1 (en) | 1991-06-13 |
AU6958091A (en) | 1991-06-26 |
EP0504259A4 (en) | 1993-04-07 |
JPH05502349A (ja) | 1993-04-22 |
CA2071500A1 (en) | 1991-06-07 |
EP0504259A1 (en) | 1992-09-23 |
KR100274725B1 (ko) | 2000-12-15 |
CA2071500C (en) | 2001-04-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C53 | Correction of patent for invention or patent application | ||
COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: SCIENTIFIC-ATLANTA, INC. TO: BRANDYTOWN EXPERIMENTAL ROOM CO., LTD. |
|
CP03 | Change of name, title or address |
Address after: new jersey Patentee after: Bland Laboratories Ltd Address before: American Georgia Patentee before: Scientific Atlanta, Inc. |
|
C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
OR01 | Other related matters | ||
ASS | Succession or assignment of patent right |
Owner name: BRANDTIN INVESTMENT CO., LTD. Free format text: FORMER OWNER: BRANDYTOWN EXPERIMENTAL ROOM CO., LTD. Effective date: 20070316 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20070316 Address after: The United States Delaware Patentee after: Bland Tang investment company Address before: new jersey Patentee before: Bland Laboratories Ltd |
|
C17 | Cessation of patent right | ||
CX01 | Expiry of patent term |
Expiration termination date: 20101206 Granted publication date: 19970108 |