| 5592551 |
Method and apparatus for providing interactive electronic programming guide |
| Jan-7-1997 |
A subscription television system is provided that transmits a plurality of television signals to a plurality of subscribers. The television signals include pay-per-view programs (purchased by feature)... |
| 5590202 |
Countdown system for conditional access module |
| Dec-31-1996 |
A digital conditional access module for a subscriber terminal comprises a decryption device including at least one PID register and an associated countdown register. The decryption device is enabled for... |
| 5590195 |
Information dissemination using various transmission modes |
| Dec-31-1996 |
A system and method of information dissemination that permits the user to listen to the specific content of information when and where he or she wants to. A radio or television receiver system receives... |
| 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... |
| 5557677 |
Method and arrangement for communication of information |
| Sep-17-1996 |
In a transmitter, information for transmission is received in the form of a digital signal, electrical or optical, which is converted into short signal fragments, each of which is assigned an index. A... |
| 5555308 |
Encryption of signals to insure viewership of commercials |
| Sep-10-1996 |
A system for distributing data to attract consumers to a commercial message provides for the delivery of free data to the consumer. The commercial message includes instructions in the form of a code, which... |
| 5553140 |
Digital and analog interface for set back box |
| Sep-3-1996 |
A method and apparatus for interfacing digital and analog consumer electronic devices with digital and analog broadcast signals. The broadcast signals are received by electronic devices which tune the... |
| 5526427 |
Universal broadcast code and multi-level encoded signal monitoring system |
| Jun-11-1996 |
A multi-level encoded signal monitoring system and a universal broadcast code are provided. A plurality of encoders are provided for encoding a predetermined program source signal. The program source signal... |
| 5524051 |
Method and system for audio information dissemination using various modes of transmission |
| Jun-4-1996 |
A system and method of information dissemination that permits the user to listen to the specific content of information when and where he or she wants to. A radio or television receiver system receives... |
| 5521979 |
Packet video signal inverse transport system |
| May-28-1996 |
An inverse transport processor system for a TDM packet signal TV receiver includes apparatus for selectively extracting desired payloads of program component data and coupling this data to a common buffer... |
| 5509077 |
Method for data security in a digital telecommunication system |
| Apr-16-1996 |
For data security in a pay-TV system, a public key is respectively calculated from a secret key prescribed for pay-TV receiver by A program purveyor. This public key is utilized in the program distribution... |
| 5506904 |
System and method for transmitting and receiving variable length authorization control for digital services |
| Apr-9-1996 |
Authorization information, such as blackout and spotlight regions, circular blackout and spotlight regions, and tier pointers, may be transmitted from an encoder to a decoder in a plurality of sessions... |
| 5504816 |
Method and apparatus for controlling access to digital signals |
| Apr-2-1996 |
A method and apparatus are provided for controlling access to digital signals sent via a first communication path and retransmitted over a second communication path. The digital signals, having been encrypted... |
| 5485518 |
Electronic media program recognition and choice |
| Jan-16-1996 |
A method and apparatus for electronic media program recognition and choice are disclosed. The invention allows parental control of the individual television programs (e.g., series, episodes, or individual... |
| 5479508 |
Method of operating a pay per view television system |
| Dec-26-1995 |
A method of operating a cable system having premium channel encoders and dedicated smart pay per view encoders, each associated with an individual channel. The pay per view encoders are provided with the... |
| 5475754 |
Packet video signal inverse transport processor memory address circuitry |
| Dec-12-1995 |
In an inverse transport processor, program component packet payloads of respective program components are directed to select areas of random access memory (RAM) (18) in accordance with a plurality of start... |
| 5459789 |
Packet TV program component detector |
| Oct-17-1995 |
Apparatus for selecting predetermined ones of packets of signal components, from a signal stream of packets includes a control device, responsive to user selection and a transmitted program guide, for... |
| 5450490 |
Apparatus and methods for including codes in audio signals and decoding |
| Sep-12-1995 |
Apparatus and methods for including a code having at least one code frequency component in an audio signal are provided. The abilities of various frequency components in the audio signal to mask the code... |
| 5425101 |
System and method for simultaneously authorizing multiple virtual channels |
| Jun-13-1995 |
A decoder in a multiservice communication system receives a plurality of services as data streams, including video, audio, teletext, and utility data, multiplexed in sequence of frames. Each service defines... |
| 5425100 |
Universal broadcast code and multi-level encoded signal monitoring system |
| Jun-13-1995 |
A multi-level encoded signal monitoring system and a universal broadcast code are provided. A plurality of encoders are provided for encoding a predetermined program source signal. The program source signal... |
| 5420866 |
Methods for providing conditional access information to decoders in a packet-based multiplexed communications system |
| May-30-1995 |
In a packet-based multiplexed communications system, a method of providing different sets of conditional access information to a remote location comprises the steps of: (a) for each different set of conditional... |
| 5400401 |
System and method for transmitting a plurality of digital services |
| Mar-21-1995 |
A plurality of digital services are carried in a multiplex data stream to a plurality of remote locations. The multiplex data stream comprises a continuous sequence of frames. Each frame comprises two... |
| 5381481 |
Method and apparatus for uniquely encrypting a plurality of services at a transmission site |
| Jan-10-1995 |
Methods and apparatus are described for uniquely encrypting a plurality services at a transmission site and for decrypting selected services at a reception site while reducing the amount of encryption... |
| 5371795 |
Automatic censorship of video programs |
| Dec-6-1994 |
A system for controlling reception or recording of television broadcasts according to censorship classifications. One or more persons monitoring broadcasts nominate a classification and cause an appropriate... |
| 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... |
| 5351294 |
Limited broadcast system |
| Sep-27-1994 |
A method and apparatus for carrying out limited encipherment broadcast by generating a cipher key obtained from destination information added to service information are provided. An information service... |
| 5349641 |
Process for the transmission and reception of conditional access programmes with a reduced programme switching time |
| Sep-20-1994 |
A process for the transmission and reception of scrambled conditional access programs, which are synchronously transmitted with entitlement control messages (ECM), with a reduced program switching time.... |
| 5341425 |
Methods and apparatus for uniquely encrypting data at a plurality of data transmission sites for transmission to a reception site |
| Aug-23-1994 |
In a data transmission system comprising a plurality N of transmission sites and at least one reception site, a set of data at each transmission site is uniquely encrypted by (a) providing each transmission... |
| 5339315 |
Cable broadcasting system and the transmission center for on demand program services |
| Aug-16-1994 |
The present invention provides a cable broadcasting system and the transmission center employed therein. In the transmission center, plural images are divided into several groups in the same kinds and... |
| 5319707 |
System and method for multiplexing a plurality of digital program services for transmission to remote locations |
| Jun-7-1994 |
A system and method for multiplexing a plurality of digital programs for transmission to a plurality of remote locations is claimed. An encoder is provided that first generates a plurality of subframe... |
| 5319709 |
System for broadband descrambling of sync suppressed television signals |
| Jun-7-1994 |
A television system having sync suppression scrambling and descrambling which includes in band and out of band signaling methods. The in band signaling method modulates the IF sound carrier of a premium... |
| 5282249 |
System for controlling access to broadcast transmissions |
| Jan-25-1994 |
A system for controlling access to broadcast transmissions including a transmitter having a transmission encoder for scrambling the broadcast, a multiplicity of subscriber receivers, each having an identical... |
| 5274706 |
Tuning system for television signal |
| Dec-28-1993 |
A tuning system for a television signal in which a TV receiver apparatus and a signal decipher apparatus are connected to each other to receive both of a scrambled TV signal and a non-scrambled signal.... |
| 5249230 |
Authentication system |
| Sep-28-1993 |
An environment which includes a communications network, user terminals, and an authentication center provides communication services only to legitimate subscribers. The center receives an equipment ID... |
| 5243647 |
Method and apparatus for broadband signal distribution |
| Sep-7-1993 |
Apparatus for broadband signal distribution is equipped with a detector for detecting when the apparatus is open and is further adapted to receive an entry code generator. If the entry code generator is... |
| 5237610 |
Independent external security module for a digitally upgradeable television signal decoder |
| Aug-17-1993 |
A decoder for descrambling encoded satellite transmissions comprises an internal security module and a resplaceable security module. The program signal is scrambled with a key and then the key itself is... |
| 5231665 |
Cable television system having dynamic market code shuffling |
| Jul-27-1993 |
A cable television system includes a headend unit having a plurality of program signal sources, encoders, scrambling circuits, and channel modulators for producing a plurality of program channels modulated... |
| 5231664 |
Cable system having multiple barkering |
| Jul-27-1993 |
A cable television system includes a headend unit having a plurality of program signal sources, encoders, scrambling circuits, and channel modulators for producing a plurality of program channels modulated... |
| 5220602 |
NICAM compatible television signal converter |
| Jun-15-1993 |
A NICAM compatible baseband television signal converter is provided. A television signal including a NICAM digital audio subcarrier is converted to baseband and the NICAM subcarrier is filtered therefrom.... |
| 5218638 |
Encipher method and decipher method |
| Jun-8-1993 |
A method and apparatus for carrying out limited encipherment broadcast by generating a cipher key obtained from destination information added to service information are provided. An information service... |
| 5195135 |
Automatic multivariate censorship of audio-video programming by user-selectable obscuration |
| Mar-16-1993 |
A method and apparatus for the automatic censorship of audio-video programming at the receiver in accordance with a viewer-selected censorship mode and multivariate censorship classification data encoded... |
| 5173900 |
Method and apparatus for communicating different categories of data in a single data stream |
| Dec-22-1992 |
A system for transmitting different categories of data in a single data stream generates program data, receiver control data, and program specific tag data for insertion into a single data stream. Program... |
| 5117458 |
Secret information service system and method |
| May-26-1992 |
An information service system including a plurality of receiving stations and information service facilities. The information service facilities include a memory circuit which stores beforehand a distribution... |
| 5111504 |
Information processing apparatus with replaceable security element |
| May-5-1992 |
A field upgradeable security system deciphers signals received from a communication network. An information processor includes a receptacle for receiving a replaceable security element. The replaceable... |
| 5081680 |
Initial reporting of remotely generated data |
| Jan-14-1992 |
A device for reporting remotely stored data is coupled to a descrambler in an impulse pay-per-view television system for storing and reporting data pertaining to subject matter descrambled by the descrambler,... |
| 5060262 |
Video scrambling, audio masking and data transmission methods for wireless cable systems |
| Oct-22-1991 |
Video scrambling is accomplished by attenuating the video carrier during the horizontal blanking interval and/or by omitting horizontal sync pulses, vertical serration pulses and equalizing pulses. The... |
| 5056139 |
Methods and apparatus for electronically limiting broadcast communication |
| Oct-8-1991 |
A communication receiver (12) is provided having a radio frequency section (20) for receiving a communication signal (14) and a corresponding code signal (16) carrying an identification code. An intermediate... |
| 5054064 |
Video control system for recorded programs |
| Oct-1-1991 |
A video system includes a central facility and a terminal. Means are provided for playing a video recording medium storing a video program including a series of television fields including a first field... |
| 5046093 |
CATV subscriber apparatus with intelligent remote control |
| Sep-3-1991 |
Subscriber apparatus for a cable television system or the like comprises a converter/descrambler and a programmable remote control. All authorization data for premium services and features a subscriber... |
| 5046092 |
Video control system for transmitted programs |
| Sep-3-1991 |
A video system includes a central facility and a terminal. Means are provided for transmitting to the terminal a video program including a series of television fields including a first field containing... |
