| 4367557 |
Wired broadcasting systems |
| Jan-4-1983 |
Subscriber access to the television transmissions of a cable TV system or other wired program transmission is governed by switching means in the remotely controlled unit to which the subscriber's receiver... |
| 5832287 |
Wideband on-demand video distribution system and method |
| Nov-3-1998 |
A system and method for distributing video or audio or other interactive program information to multiple users includes master files of such program information that can be selectively distributed to community... |
| 5550575 |
Viewer discretion television program control system |
| Aug-27-1996 |
A viewer discretion television program control system including devices and methods for controlling access to television viewing, especially by children. It includes provision for storing suitability ratings... |
| 4599648 |
Video signal transmission systems |
| Jul-8-1986 |
A video signal transmission system wherein a television video signal is subjected to a waveform conversion in a video processing unit on a transmission side, then sent to a receiving side and restored... |
| 5410601 |
Video scramble system and equipment |
| Apr-25-1995 |
The object of the present invention is to provide various scramble systems and equipments for embodying the scramble systems for omitting unqualified viewers in a pay TV system such as CATV. One of the... |
| 4742545 |
Video picture signal scrambling system |
| May-3-1988 |
A video picture signal scrambling system for subscription braodcast or cablecast television systems which can scramble video signals without adversely effecting pictures received at a subscriber's terminal.... |
| 5699426 |
Video data bus communication system and method |
| Dec-16-1997 |
A video data communication system and method are disclosed which provides for the secure transmission of video data among devices connected to a video data bus. The video data is transmitted with address... |
| 4250524 |
Validation apparatus in a pay television system |
| Feb-10-1981 |
A validation apparatus in a pay television system, including a code detector means for successively detecting a sequence of code signals, from an encoded composite TV signal, a key code circuit means having... |
| 7039816 |
Using smartcards or other cryptographic modules for enabling connected devices to access encrypted audio and visual content |
| May-2-2006 |
To prevent piracy, audiovisual content is encrypted prior to transmission to consumers. A low-cost, high-security cryptographic rights module (such as a smartcard) enables devices such as players/displays... |
| 5912971 |
User-addressing method and receiver in an authorized access television system |
| Jun-15-1999 |
A collective address is defined at the transmitter end, not only by the contents of a field of bits, but also by a compulsory position of said field in a word which is larger than said field. Said word... |
| 6058192 |
Universal signal processor and method of processing |
| May-2-2000 |
A method for decoding and reconstructing a scrambled video signal is provided in which a scrambled video signal is received and the location of at least one predetermined element of the scrambled video... |
| 4550341 |
Unauthorized observation preventing device for CATV system |
| Oct-29-1985 |
In a cable television system of the type wherein a cable television signal including free and restricted television channels is subjected to selective frequency conversion at individual terminal units... |
| 4554579 |
Two-way CATV system with AML commands |
| Nov-19-1985 |
In a two-way cable television (CATV) system, multiple subscriber address codes are provided during designated vertical blanking interval (VBI) lines of the video signal transmitted from the CATV headend... |
| 5621793 |
TV set top box using GPS |
| Apr-15-1997 |
An integrated receiver decoder (IRD), commonly called a set-top box, has a global positioning system (GPS) receiver. The GPS receiver checks to see if the IRD is at an authorized location and allows descrambling... |
| 5579391 |
TV scramble system for preventing illegal reception |
| Nov-26-1996 |
A scramble system can effectively prevent a scrambled broadcast from being viewed illegally. In a scramble system in which a video signal scrambled by a scrambling apparatus (10) is descrambled by a decoding... |
| 4992868 |
True information television (TITV) and vision system |
| Feb-12-1991 |
A learning television system will transmit only true information data which bandwidth is not dependent on screen size or resolution but rather only on novelty and movement within the image. This invention... |
| 4901349 |
Time dispersal encryption of TV signals |
| Feb-13-1990 |
In encrypting a video signal for communications security, the horizontal synchronization pulses are removed, the active signal portions of each line in a field are delayed according to psuedorandom sequence... |
| 5053883 |
Terminal polling method |
| Oct-1-1991 |
A method of transferring data from a plurality of remote terminals to a central location over a communication network is disclosed. First random numbers are respectively generated for each of the remote... |
| 5311543 |
Television transmission system using two stages of spead-spectrum processing |
| May-10-1994 |
A 2-stage SS (spread-spectrum) system for transmitting a coded TV signal, said coded signal consisting of first components requiring near-perfect transmission and second components for which somewhat imperfect... |
| 4679235 |
Television signal transmission system |
| Jul-7-1987 |
A television signal transmission system transmits a television signal having a polarity inverted portion in association with a scene change and a polarity inverted portion after a predetermined time interval... |
| 4870682 |
Television scrambling system |
| Sep-26-1989 |
A signal scrambling system is provided in which the scrambler includes a transition limiter which limits the size of changes in the amplitude of the input clear signal, a device for generating a pseudo... |
| 4995078 |
Television broadcast system for selective transmission of viewer-chosen programs at viewer-requested times |
| Feb-19-1991 |
A television broadcast system using land lines is provided for real-time transmission of a viewer-chosen program at a viewer requested time to the requesting viewer's television receiver. The preferred... |
| 4890320 |
Television broadcast system for selective transmission of viewer-chosen programs at viewer-requested times |
| Dec-26-1989 |
A televsion broadcast system using land lines is provided for real-time transmission of a viewer-chosen program at a viewer requested time to the requesting viewer's television receiver. The preferred... |
| 4008369 |
Telephone interfaced subscription cable television system especially useful in hotels and motels |
| Feb-15-1977 |
A PABX telephone interfaced cable television system especially useful in hotels and motels for distributing free and premium program channels via a coaxial cable television signal distribution network... |
| 4760597 |
Technician set-up unit for and method of cable television converter installation and address assignment |
| Jul-26-1988 |
A technician set-up unit is described for cable television converter installation and address assignment, and a method for using the unit with an addressable television converter. The set-up unit and method... |
| 4864429 |
System for providing transmitter-controlled actuation of equipment at the receiving end of a communications system |
| Sep-5-1989 |
A system for providing transmitter-controlled actuation of equipment at the receiving end of a communications system by using an identification signal transmitted for the entire duration of a broadcast... |
| 4823385 |
System for processing coded information |
| Apr-18-1989 |
A system for processing coded information is disclosed. A receiver receives coded information from a source. The receiver is equipped with a decoder and a real time clock. The coded information is decoded... |
| 5400402 |
System for limiting use of down-loaded video-on-demand data |
| Mar-21-1995 |
A digital data system that includes a control system at a customer site that blocks access to a down-loaded stored program after it has been viewed a predetermined number of times (e.g., once), or after... |
| 6650753 |
System for encrypting broadcast programs in the presence of compromised receiver devices |
| Nov-18-2003 |
A digital broadcast system provides secure transmission of digital programs to in-home digital devices even when some of the devices are unauthorized. A matrix of device keys S.sub.j,i is provided, wherein... |
| 5463656 |
System for conducting video communications over satellite communication link with aircraft having physically compact, effectively conformal, phased array antenna |
| Oct-31-1995 |
A system architecture and communication methodology for significantly reducing the size of an aircraft antenna required to provide full broadcast quality video communications with an aircraft via a satellite... |
| 5091936 |
System for communicating television signals or a plurality of digital audio signals in a standard television line allocation |
| Feb-25-1992 |
A system is provided for selectively transmitting horizontal television lines including video and digital audio components or equivalent digital data lines containing a plurality of audio program signals.... |
| 6100916 |
System and method for subscriber controlled signal blocking |
| Aug-8-2000 |
A technique for the blocking of individual programs and/or portions of programs transmitted in a source signal, e.g., a cable television signal. In particular, individual programs and/or portions of programs... |
| 5677953 |
System and method for access control for portable data storage media |
| Oct-14-1997 |
The system and method of the present invention provides the support of high density removable media, such as CD-ROM or MO, to be used as a distributed media for storing data where access thereto is securely... |
| 4533949 |
Subscription television system |
| Aug-6-1985 |
In a subscription television system, only a video signal for a specific program is scrambled in a television signal in accordance with a predetermined scrambling mode. A key signal, used for unscrambling... |
| 4215366 |
Subscriber-limited reception television broadcast security encoder-decoder system |
| Jul-29-1980 |
A method and apparatus for encoding and decoding of standard television signals are provided for enabling reception thereof in an intelligible manner only by authorized subscribers. The scrambling of the... |
| 4292650 |
Stv Subscriber address system |
| Sep-29-1981 |
A system for selectively addressing a plurality of television receivers, each of the receivers being identified by a unique n-bit address code, comprises means for transmitting a prefix code which is common... |
| 4554581 |
STV Decoder with improved data signal recognition capability |
| Nov-19-1985 |
An addressable subscription television decoder includes an input stage including an IF amplifier for converting a scrambled RF television signal to a composite baseband video signal. The baseband video... |
| 4613901 |
Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals |
| Sep-23-1986 |
A system and method for scrambling and selectively descrambling television signals that are transmitted to subscribers' descramblers in a subscription television system. A working key signal is generated... |
| 4039954 |
Signal distribution device for a cable television |
| Aug-2-1977 |
A cable television signal distribution system provides a plurality of television programs and radio programs which are transmitted in frequency multiplex to a plurality of subscriber drop lines. A data... |
| 4598312 |
Secure video distribution systems |
| Jul-1-1986 |
A secure cable television distribution system is disclosed for controlling subscriber access to preferred channel information in accordance with the teachings of the instant invention. Premium channel... |
| 4944006 |
Secure data packet transmission system and method |
| Jul-24-1990 |
A bit packet communication system includes a head-end having a software implemented 16 bit shift register with a plurality of feed-forward taps and a different plurality of feedback taps for simultaneously... |
| 4876718 |
Secure data packet transmission system and method |
| Oct-24-1989 |
A bit packet communication system includes a head-end having a software implemented 16 bit shaft register with a plurality of feed-forward taps and a different plurality of feed-back taps for simultaneously... |
| 6304659 |
Secure data broadcasting |
| Oct-16-2001 |
In a method of receiving packets of data addressed to one or more receivers each having an individual identifier, wherein the data is included in a digital signal having destination addresses successively... |
| 5003592 |
Scrambling video by time shifting |
| Mar-26-1991 |
A system for scrambling and descrambling the image associated with a video signal employs the shifting in time of a video image after removal of synchronization and color burst reference signals. Coded... |
| 4594609 |
Scrambling system for television video signal |
| Jun-10-1986 |
A method and apparatus for scrambling a composite television signal and method and apparatus for unscrambling of the scrambled television signal are disclosed in the present application. The method of... |
| 3996418 |
Scrambler and decoder for secure television system |
| Dec-7-1976 |
A scrambler for a television system alternately inverts the phase of the carrier which is modulated by the television signal. A binary coding signal controls the manner of the carrier-phase inversion.... |
| 3936593 |
Scrambler and decoder for a television signal |
| Feb-3-1976 |
An improved scrambler and decoder for a television signal is described wherein a television carrier is inverted in phase and subjected to low frequency amplitude modulation to obtain enhanced channel security.... |
| 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... |
| 4709266 |
Satellite scrambling communication network using geographically separated uplinks |
| Nov-24-1987 |
A satellite scrambling communication network uses geographically separated uplinks to provide scrambled video and audio signals and descrambling control data to separated individual subscribers and to... |
| 5235643 |
Satellite receiver retuning system |
| Aug-10-1993 |
A remotely retunable receiver for use in a satellite video programming distribution system includes the capability to retune groups of subscribers to different satellite feeds during a blackout of a video... |
