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7391866 |
Broadcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list
A reception apparatus includes: a reception unit for receiving the scrambled content, the scrambled content being scrambled so that a predetermined unit of scrambled content is descrambled using a...
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7389420 |
Content authentication and recovery using digital watermarks
The disclosure describes methods for using digital watermarking to authenticate digital media signals, such as images, audio and video signals. It also describes techniques for using embedded...
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7340059 |
Programmable scrambler and De-scrambler for digital telephony equipment
A scrambler circuit for digital telephony equipment receives a sequence of input bits, generates the sequence of output bits based on the input bits and stores the sequence of output bits. The...
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7233670 |
Signal tracing system and method
A system and a method are for determining the origin of a signal received by a pay television subscriber in a given region. A system includes an encryption device located at a main operator, a...
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7043022 |
Packet order determining method and apparatus
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...
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6928162 |
Method and system for manipulating and telescoping a hash function
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...
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6925342 |
System and method for protecting digital media
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...
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6839433 |
Method and apparatus for generating a signal that defeats illegal cable decoders
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...
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6792111 |
Cryptation system for packet switching networks based on digital chaotic models
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...
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6754347 |
Input/output unit, input/output method, and receiving unit
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...
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6633982 |
Method and process for managing ultra secure electronic distribution of digital movies to commercial exhibitors
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...
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6275509 |
Masked signal transceiver
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...
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6215875 |
Cipher processing system
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...
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6188870 |
Passive interdiction system for scrambling
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...
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5621792 |
Method and system of controlling the mode of access to signals, in particular picture signals
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...
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5467397 |
Interdiction method and apparatus with variable dwell time
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...
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5463689 |
Interdiction method and apparatus with random mode jamming
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...
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5361301 |
Interdiction method and apparatus with direct memory control of variable frequency elements
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...
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5355410 |
Method and apparatus for multi-tire time shared CATV jamming
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...
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5341424 |
Interdiction method and apparatus with frequency change inhibit function
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...
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5323462 |
CATV subscriber disconnect switch
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...
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5317635 |
Interdiction method and apparatus with mode control for variable frequency elements
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...
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5289541 |
Interdiction method and apparatus with constant blanking and variable dwell times
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...
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5278908 |
Interdiction method and apparatus with programmable jamming effectiveness
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...
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5276734 |
Oscillator system
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...
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5265160 |
Interdiction method and apparatus with pulsed mode jamming
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...
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5255318 |
Expandable cable television subscriber control system
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...
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5243651 |
Diagnostic method and apparatus for a cable television interdiction system
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...
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5233652 |
Selective off-premises jamming for premium CATV service
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...
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5228082 |
Jamming signal producing system in CATV
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...
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5142574 |
Optimum amplitude and frequency of jamming carrier in interdiction program denial system
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....
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5140633 |
Cable subscriber control device using shared jamming modules
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...
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5014309 |
Off-premises cable television channel interdiction method and apparatus
An off-premises cable television interdiction apparatus provides a microprocessor controller for controlling and switching one or more variable frequency voltage controlled oscillators. The...
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4837820 |
Hybrid CATV scrambling system
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"...
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4825468 |
Video noise jammer
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...
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4792971 |
Selective viewing control system for CATV
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...
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4769838 |
Community antenna television reception controlling apparatus
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...
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4737990 |
Unauthorized channel jamming signal applying method for CATV system
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...
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4651204 |
Jamming signal generating circuit
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...
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4638356 |
Apparatus and method for restricting access to a communication network
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...
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4613826 |
Frequency synthesizer for CATV tuner
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...
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4450481 |
Tamper-resistant, expandable communications system
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...
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4434436 |
Addressable premium channel obfuscation device for cable television systems
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...
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