| 7043022 |
Packet order determining method and apparatus |
| May-9-2006 |
A transmitter adds packet transmission order information to transmitted packets using a forward error device (416) and a masking device (420). The masking device (420) receives ordering masks (610) from... |
| 6928162 |
Method and system for manipulating and telescoping a hash function |
| Aug-9-2005 |
A method and system for providing a hash and a complement of the hash for an item in a computer system are disclosed. The method and system include providing a plurality of components from the item. The... |
| 6925342 |
System and method for protecting digital media |
| Aug-2-2005 |
A system and method for verifying digital recordings that have a plurality of tracks. The system includes an encoder that: divides the digital recording into a plurality of sections and associates a random... |
| 6839433 |
Method and apparatus for generating a signal that defeats illegal cable decoders |
| Jan-4-2005 |
Illegal cable decoders, i.e., black boxes, are defeated by adding, inserting and/or superimposing an added signal onto an already scrambled video signal, which added signal is capable of disrupting the... |
| 6792111 |
Cryptation system for packet switching networks based on digital chaotic models |
| Sep-14-2004 |
A cryptation system for information transmitted through packet switching networks masks the digital information data by combining it at the transmitting station with digital data of a certain cryptation... |
| 6754347 |
Input/output unit, input/output method, and receiving unit |
| Jun-22-2004 |
A switching portion of an IRD supplies a non-descrambled TS (transport stream) received from a front end portion or a descrambled TS received from a descrambler to a DVCR connected to an IEEE 1394 interface.... |
| 6633982 |
Method and process for managing ultra secure electronic distribution of digital movies to commercial exhibitors |
| Oct-14-2003 |
A method and system for managing electronic distribution of digital movies to commercial exhibitors at warp speed is made ultra secure by utilizing synchronized and concurrent digitally bifurcated data... |
| 6275509 |
Masked signal transceiver |
| Aug-14-2001 |
A masked signal transceiver of the present invention comprises a transmitter for transmitting a combined signal of a primary communications signal and an attenuated secondary communications signal occupying... |
| 6215875 |
Cipher processing system |
| Apr-10-2001 |
A cipher processing apparatus which readily updates a cipher processing circuit for encrypting information communicated through a communication function. A service station side and a user side are connected.... |
| 6188870 |
Passive interdiction system for scrambling |
| Feb-13-2001 |
The passive interdiction system for CATV scrambling provides a plurality of passive, preselected negative signal traps for securing specific CATV channels. Each trap cyclically attenuates the desired CATV... |
| 5621792 |
Method and system of controlling the mode of access to signals, in particular picture signals |
| Apr-15-1997 |
The present invention concerns a method of controlling the mode of access to wanted signals, such as picture signals (IMAGE), whereby the user selects an access mode to a wanted signal remotely. A first... |
| 5467397 |
Interdiction method and apparatus with variable dwell time |
| Nov-14-1995 |
A cable television interdiction apparatus comprises a microprocessor actuation and control means for actuating and controlling one or more frequency agile voltage controlled oscillators. The voltage controlled... |
| 5463689 |
Interdiction method and apparatus with random mode jamming |
| Oct-31-1995 |
An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of... |
| 5361301 |
Interdiction method and apparatus with direct memory control of variable frequency elements |
| Nov-1-1994 |
An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of... |
| 5355410 |
Method and apparatus for multi-tire time shared CATV jamming |
| Oct-11-1994 |
A method and apparatus, for jamming selected channels, in a CATV system, wherein six different pre-determined frequencies ("fx"), are generated at a head end, on a time divisional basis, which head end... |
| 5341424 |
Interdiction method and apparatus with frequency change inhibit function |
| Aug-23-1994 |
An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of... |
| 5323462 |
CATV subscriber disconnect switch |
| Jun-21-1994 |
Television service denial apparatus comprises a microprocessor controller for controlling the generation of a control signal waveform. The control signal toggles a program denial device between first and... |
| 5317635 |
Interdiction method and apparatus with mode control for variable frequency elements |
| May-31-1994 |
An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of... |
| 5289541 |
Interdiction method and apparatus with constant blanking and variable dwell times |
| Feb-22-1994 |
An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of... |
| 5278908 |
Interdiction method and apparatus with programmable jamming effectiveness |
| Jan-11-1994 |
An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of... |
| 5276734 |
Oscillator system |
| Jan-4-1994 |
A system for producing an oscillating signal to be used for jamming signal for a band of CATV has a voltage producing circuit for producing a control voltage corresponding to the band, a first oscillator... |
| 5265160 |
Interdiction method and apparatus with pulsed mode jamming |
| Nov-23-1993 |
An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of... |
| 5255318 |
Expandable cable television subscriber control system |
| Oct-19-1993 |
A subscriber control system designed to be placed outside of the subscriber's home, for controlling access to cable television signals provided by a cable television headend. The system is modular in design... |
| 5243651 |
Diagnostic method and apparatus for a cable television interdiction system |
| Sep-7-1993 |
A diagnostic method and apparatus for a cable television interdiction system is provided. One or more diagnostic modes each corresponding to a particular problem or state associated with the interdiction... |
| 5233652 |
Selective off-premises jamming for premium CATV service |
| Aug-3-1993 |
Selective off-premises jamming for premium CATV service is provided by using continuously running fixed-frequency oscillators (19.1-19.n) for generating jamming signals at each of a plurality of distribution... |
| 5228082 |
Jamming signal producing system in CATV |
| Jul-13-1993 |
A system for producing a jamming signal to be inserted in a band of CATV has a voltage producing circuit for producing a control voltage corresponding to the band, and a first voltage-controlled oscillator... |
| 5142574 |
Optimum amplitude and frequency of jamming carrier in interdiction program denial system |
| Aug-25-1992 |
Off premises cable television interdiction apparatus comprises a microprocessor actuation and control means for actuating and controlling one or more frequency agile voltage controlled oscillators. The... |
| 5140633 |
Cable subscriber control device using shared jamming modules |
| Aug-18-1992 |
A device is disclosed for controlling access to cable television signals. Jamming oscillators are shifted in frequency, jamming multiple services each. The oscillators are shared between multiple subscriber... |
| 5014309 |
Off-premises cable television channel interdiction method and apparatus |
| May-7-1991 |
An off-premises cable television interdiction apparatus provides a microprocessor controller for controlling and switching one or more variable frequency voltage controlled oscillators. The variable frequency... |
| 4912760 |
Off-premises cable television channel interdiction method and apparatus |
| Mar-27-1990 |
Off premises cable television interdiction apparatus comprises a microprocessor actuation and control means for actuating and controlling a plurality of frequency agile voltage controlled oscillators.... |
| 4837820 |
Hybrid CATV scrambling system |
| Jun-6-1989 |
A CATV scrambling system ultilizes low cost, uncritical, pole mounted components for all subscriber locations and high cost precision components only in subscriber units provided at "premium" subscriber... |
| 4825468 |
Video noise jammer |
| Apr-25-1989 |
A multichannel signal distribution control system, such as a CATV system, providing a plurality of video signal channels wherein selected channels are obscured by random noise jammer signals. The signal... |
| 4792971 |
Selective viewing control system for CATV |
| Dec-20-1988 |
A selective viewing control system for controlling viewing access to designated channels in a CATV system. A CATV control center sends to viewing control units a digital signal indicating which channels... |
| 4769838 |
Community antenna television reception controlling apparatus |
| Sep-6-1988 |
A reception controlling apparatus for a CATV system in which jamming signals are added to the signals sent to each subscriber's terminal unit in such a manner as to accurately jam the designated nonpermitted... |
| 4737990 |
Unauthorized channel jamming signal applying method for CATV system |
| Apr-12-1988 |
In a jamming signal applying device connected between a cable and subscribers' terminal units in a CATV system, a signal for scrambling the video signal is produced in a time sharing mode, with the time... |
| 4651204 |
Jamming signal generating circuit |
| Mar-17-1987 |
A jamming circuit for a CATV system in which the jamming signal is offset in frequency by a voltage controlled oscillator and then mixed with the unjammed television signal. A difference component is obtained... |
| 4638356 |
Apparatus and method for restricting access to a communication network |
| Jan-20-1987 |
Apparatus restricts access to a communication network having at least one service node for providing services to subscribers. A subscriber terminal, coupled to the communication network, includes a secret... |
| 4613826 |
Frequency synthesizer for CATV tuner |
| Sep-23-1986 |
A variable frequency oscillator includes a RAM which stores a frequency setting data and provides a frequency control data, a VCO circuit which provides an oscillation output having a frequency which is... |
| 4450481 |
Tamper-resistant, expandable communications system |
| May-22-1984 |
An expandable, multipurpose digital and analog communications system in which a plurality of remote interrogator units connected in a branch of the system are isolated from one another by band stop filters... |
| 4434436 |
Addressable premium channel obfuscation device for cable television systems |
| Feb-28-1984 |
An obfuscation device for use in cable television systems includes a memory for storing a plurality of channel status bits. The state of each channel status bit corresponds to the authorization or non-authorization... |
