| 5036537 |
Geographic black-out method for direct broadcast satellite system |
| Jul-30-1991 |
Television programs are broadcast to a plurality of receiver units in various geographic areas. Each unit has a memory for storage of a designation code representative of its location and a memory for... |
| 5033085 |
Method for controlling video and audio of a television set |
| Jul-16-1991 |
A method for controlling video and audio of a television set using a code in such a manner that a code is set up in a microcomputer of the television set, which is operated normally only when the code... |
| 5031213 |
CATV terminal unit |
| Jul-9-1991 |
A CATV terminal unit includes a channel converter for selecting and down-converting a designated channel, a sound volume adjusting section for electronically adjusting the sound volume of a received signal... |
| 5016272 |
Home video system |
| May-14-1991 |
A home video system comprising a headend system, a transmission channel, a trap, a converter, descrambling equipment, receiving equipment, and requesting equipment. The headend equipment includes program... |
| 4995080 |
Television signal scrambling system and method |
| Feb-19-1991 |
A method of operating a pay per view (PPV) television system includes transmitting global data packets alternately encrypted with two different session keys. Subscriber terminals store three session keys,... |
| 4991208 |
Video control system having session encryption key |
| Feb-5-1991 |
A video system includes a central facility and a terminal. Video program means for provides the terminal with a video program including a series of television fields including a first field containing... |
| 4989245 |
Controlled authorization of descrambling of scrambled programs broadcast between different jurisdictions |
| Jan-29-1991 |
A control system and a corresponding method for controlling descrambling within a plurality of jurisdictions of scrambled programs broadcast from at least one of said jurisdictions. The control system... |
| 4975951 |
IPPV programming distribution control system |
| Dec-4-1990 |
A distribution control system for controlling the distribution of scrambled impulse pay per view (IPPV) programming from a plurality of different IPPV programmers to a plurality of descramblers. The system... |
| 4962529 |
Scrambling method for TV picture |
| Oct-9-1990 |
A scrambling method for TV pictures avoids picture deterioration by level compressing only selected horizontal flyback portions of the video signal to effect scrambling. A key signal is superposed on selected... |
| 4959862 |
Active multichannel video processing hub for optimum transition from fiber to coax |
| Sep-25-1990 |
An active multichannel video processing hub which provides optinum transition from fiber to coaxial cable, provides optimum trading of bandwidth for signal to noise ratio. Fiber optic links have a very... |
| 4947429 |
Pay per view television signaling method |
| Aug-7-1990 |
A method of operating a pay per view television system in which the television signal includes a program tag and an IPPV tag identifying memory locations in subscriber authorization memories. A subscriber... |
| 4937866 |
System for decoding transmitted scrambled signals |
| Jun-26-1990 |
In a pay television system, a program signal is transmitted scrambled to prevent its unauthorized reception, the scrambled signal being accompanied by authorization codes, one for each authorized subscriber,... |
| 4930160 |
Automatic censorship of video programs |
| May-29-1990 |
A video program is received from a broadcast or video recording and displayed for viewing. On receipt of a prescribed classification code or group of codes display is switched to an alternative source.... |
| 4916737 |
Secure anti-piracy encoded television system and method |
| Apr-10-1990 |
A scrambling and descrambling system and method for the video and/or audio portions of a broadcast TV signal, for example, broadcast by cable, microwave or communication satellite, includes a telephone... |
| 4908859 |
Receiver access interface to service components in television channel |
| Mar-13-1990 |
A receiver interface system for enabling an operator to access different types of services in a like manner, wherein the services contain different combinations of service components received by a receiver... |
| 4907269 |
Process and circuit layout for the recognition of an identification sign (signum) contained in a video signal |
| Mar-6-1990 |
Circuitry for recognizing an authorization code included in a video signal for enabling a subscriber's television receiver, includes quantizing apparatus for coarsely quantizing the received signal. A... |
| 4878245 |
Control and metering system for pay television over a cable network |
| Oct-31-1989 |
An improved control and metering system for pay television distribution over a cable network. A control unit is located near each receiver on a subscribers premises and a secure filter, switching and metering... |
| 4864614 |
Authorising coded signals |
| Sep-5-1989 |
In a transmission system authorization codes are transmitted to authorize subscribers to receive scrambled signals in an intelligible manner, such a system being a television transmission system. If each... |
| 4823386 |
Addressable subscriber cable television system |
| Apr-18-1989 |
An addressable cable television system includes a transmission cable for transmitting a plurality of television signals driven onto the cable from a head end thereof and a plurality of multiple subscriber... |
| 4817143 |
Scrambled signal receiver |
| Mar-28-1989 |
A system including a receiver which receives scrambled signals and subjects them to a descrambling process under the control of control words periodically conveyed to the receiver by a conditional access... |
| 4807285 |
Method and apparatus for scrambling a television signal |
| Feb-21-1989 |
An in-band television signal scrambling method and apparatus are disclosed which employ a scrambler which receives and scrambles a television signal by suppressing the amplitude of the horizontal synchronizing... |
| 4802214 |
Method and apparatus for identifying and rendering operative particular descramblers in a television signal scrambling system |
| Jan-31-1989 |
An in-band television signal scrambling method and apparatus are disclosed which employ a scrambler which receives and scrambles a television signal and one or more descramblers for restoring the scrambled... |
| 4797918 |
Subscription control for television programming |
| Jan-10-1989 |
A method and apparatus for one-way subscription television service control which allows the subscribers to subscribe in advance to a variety of programming or to select programming oa a pay-per-view basis. |
| 4792972 |
Remote programming of CATV channel authorization unit |
| Dec-20-1988 |
Method and apparatus is disclosed for programming a CATV channel authorization unit. In a cable television (CATV) system, a CATV transmitter provides a plurality of CATV system channels to a channel authorization... |
| 4744080 |
Apparatus for receiving digital sound/data information |
| May-10-1988 |
A receiver for recovering sound/data information for a number of services transmitted digitally as a packet multiplex has the data, after demodulation, applied to a first unit (3) where it is resynchronized... |
| 4736422 |
Encrypted broadcast television system |
| Apr-5-1988 |
A conditional access system for transmitting and receiving scrambled television signals over-air includes means for addressing each of the receiving apparatus with an over-air signal whereby to permit... |
| 4736421 |
System for displaying the subscription state of a pay broadcasting program |
| Apr-5-1988 |
A program data (ATji) corresponding to a scrambled pay program signal, subscribed program data (BTji) representing a program signal subscribed by a subscriber and the scrambled program signal are demodulated... |
| 4710956 |
Cable television system |
| Dec-1-1987 |
A cable television system and method in which each subscriber's converter is located outside the subscriber's premises in an external control unit ("ECU") which also includes several other subscribers'... |
| 4694489 |
Video transmission system |
| Sep-15-1987 |
A subscriber cable television system uses predominantly digital signal processing techniques and has extremely high security and an increased capacity for transmitting program and customer data to individual... |
| 4685131 |
Program blocking method for use in direct broadcast satellite system |
| Aug-4-1987 |
Programming tiers are authorized for viewing on an impulse pay-per-view basis. The system operator controls individual receiver units to block the display of programming on selected tiers because the subscriber... |
| 4682360 |
Video transmission system |
| Jul-21-1987 |
A subscriber cable television system uses predominantly digital signal processing techniques and has extremely high security and an increased capacity for transmitting program and customer data to individual... |
| 4682224 |
System, method, and apparatus for television signal scrambling and descrambling |
| Jul-21-1987 |
A system for providing intelligible video program signals and corresponding video synchronization signals to authorized video displays only comprising transmitting means for transmitting scrambled signals... |
| 4682223 |
Descrambler unit method and apparatus for television signal descrambling |
| Jul-21-1987 |
A method of descrambling received video program signals with transmitted synchronization signals for use in a video receiver comprising the steps of providing first terminals for receiving the scrambled... |
| 4663664 |
Electronic ticket method and apparatus for television signal scrambling and descrambling |
| May-5-1987 |
An electronic ticket for descrambling transmitted video program and synchronization signals for use in a video receiver comprising first terminals for receiving the scrambled video signals, a descrambling... |
| 4636855 |
Scrambled television signal receiver system |
| Jan-13-1987 |
A television signal receiving system for use with a scrambled television signal or a standard television signal includes a recording and reproducing circuit which records and reproduces the received television... |
| 4635112 |
Method and apparatus for recording scrambled television signals |
| Jan-6-1987 |
A scrambled television program is received and recorded in a scrambled fashion automatically in a video tape recorder by detecting program code signals placed in vertical blanking intervals of ten fields... |
| 4628359 |
Memory selecting system for scrambled television receiver |
| Dec-9-1986 |
A scrambled television program that is received and recorded in a scrambled fashion includes program code and corresponding key codes for use in descrambling the recorded scrambled signal. The program... |
| 4621285 |
Protected television signal distribution system |
| Nov-4-1986 |
A television signal distribution system protects outgoing programs from unauthorized reception; and marks or tags the conveyed signals with a digital word identifying the class of viewers authorized to... |
| 4602284 |
Adapter for rendering a non-addressable CATV converter addressable |
| Jul-22-1986 |
An STV system commonly transmits scrambled television signals which include encoded data reflecting subscriber address, authorization and program code information. In some STV systems the subscriber installation... |
| 4598288 |
Apparatus for controlling the reception of transmitted programs |
| Jul-1-1986 |
A control system for use with recording apparatus enables the recording of programs simultaneously desired by a user and authorized by a program provider, typically a broadcaster. The broadcaster attaches... |
| 4589017 |
Pay television receiving system |
| May-13-1986 |
In a system for receiving a scrambled pay television signal wherein a radio frequency video signal with a horizontal synchronizing signal erased therefrom by elevating portions of the video signal containing... |
| 4577224 |
Secure cable television access system with tiering control |
| Mar-18-1986 |
A poach-resistant system enabling cable television subscribers to receive upon request certain programs otherwise unavailable (i.e., "secure") while precluding such reception by non-requesting subscribers... |
| 4567512 |
Recorded program communication system |
| Jan-28-1986 |
Selected program code and time data entered into a subscriber command terminal automatically establishes a two-way telephone link with a library computer from which instruction data is transferred to the... |
| 4536791 |
Addressable cable television control system with video format data transmission |
| Aug-20-1985 |
An addressable cable television control system controls television program and data signal transmission from a central station to a plurality of user stations. The data signals include both control and... |
| 4535355 |
Method and apparatus for scrambling and unscrambling data streams using encryption and decryption |
| Aug-13-1985 |
Methods and apparatus for scrambling and unscrambling a plurality of data streams having differing data, on a plurality of signal channels, are taught. The data streams may be television programs or other... |
| 4528589 |
Method and system for subscription television billing and access |
| Jul-9-1985 |
A subscription television system and method in which billing information regarding programs actually viewed by a subscriber of the system is accumulated over non-dedicated telephone lines. A scrambled... |
| 4503462 |
Automatic homing system for a subscription television signal decoder |
| Mar-5-1985 |
An automatic homing system for a subscription television signal decoder comprises a tuning system responsive to a decoder off-command signal for operation in a search mode wherein successive television... |
| 4494143 |
Television descrambler with security plug having folded flexible printed circuit board providing tier tag memory |
| Jan-15-1985 |
A descrambler or decoder for premium scrambled television signals compares the tier of the received signal with the contents of a memory associated with the descrambler. The memory of each descrambler... |
| 4494142 |
Method of and apparatus for scrambled television program addressable subscription selection and decoding |
| Jan-15-1985 |
This disclosure is concerned with an improved special program addressable subscription decoding technique in accordance with which ordinary program subscribing decoders continue to receive and decode the... |
| 4475123 |
Addressable subscriber cable television system |
| Oct-2-1984 |
An addressable cable television system includes a transmission cable for transmitting a plurality of television signals driven onto the cable from a head end thereof and a plurality of multiple subscriber... |
