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| Number | Title | Issue Date |
| 4780758 | Telecommunication system with burst and continuous audio signals A telecommunication system for transmitting video and plural audio information on a transmission medium includes a facility and an addressable terminal. The facility includes arrangements for providing addressed video frames containing information corresp... | 10/25/1988 |
| 4780757 | Telecommunication system with frame selected continuous audio signals A telecommunication system has a facility and an addressable terminal coupled through a transmission medium. The facility includes means for providing addressed video frames containing information corresponding to still images and for providing addressed ... | 10/25/1988 |
| 4776010 | Power supply control circuit in subscriber's terminal for control unit in subscriber's communication system A subscriber's terminal is connected by a cable to a control unit, which is connected to a central station by a cable. The subscriber's terminal has a voltage supply source for supplying power to the control unit through the cable. The subscriber's termin... | 10/04/1988 |
| 4771456 | Cable television channel selector/descrambler for use with cable-ready video applicances A cable television channel selector/descrambler enables the full capabilities of a cable-ready video appliance (e.g., television set or VCR) to be used in conjunction with a cable television system providing unscrambled channels and scrambled premium chan... | 09/13/1988 |
| 4760442 | Wideband digital signal distribution system Wideband digital signals, such as video program signals, are distributed to multiple customer locations by providing the wideband digital signals to all customer line interface units in an intermediate selection terminal which is remote from a central wid... | 07/26/1988 |
| 4754426 | System for controlling communications on a cable television network A system for controlling a cable television network includes a head end, a plurality of addressable external control units having subscriber converters located off the subscriber's premises, and one or more subscriber devices located on the subscriber pre... | 06/28/1988 |
| 4713840 | Data communication system A data communication system for use in a CATV system or the like employing only simple data communications operations between a central control device and terminal units for effecting a descrambling function. The central control device is connected to the... | 12/15/1987 |
| 4686564 | Communication data processing device of cable television system An external control unit for a CATV system has a CPU and a RAM with many kinds of memory maps. Reference data to be stored in the memory maps is transmitted from a central station. When a subscriber requests the tuning of a TV channel for a pay program to... | 08/11/1987 |
| 4684980 | System for controlling communications on a cable television network A system for controlling a cable television network includes a headend, a plurality of addressable external control units having subscriber converters located off the subscribers' premises, and one or more subscriber devices located on the subscriber prem... | 08/04/1987 |
| 4677686 | Passive transmission of data over cable TV systems A communications system which enables enhanced services to be provided over cable TV systems. The design of the system is such that amplification is not required. Therefore, two-way transmission is possible on the low band of "two-way capable" cable syste... | 06/30/1987 |
| 4591906 | Wireless transmission from the television set to the television station Query signals are transmitted by wireless means from the television station to the television set. Response units at receiver locations have a radio frequency transmitter send a response to the station inquiry sent on horizontal lines of the T.V. signal a... | 05/27/1986 |
| 4558464 | Address-programmable CATV converter An addressable CATV converter for connection with a remote headend in a cable distribution system contains a memory into which a unique address code identifying that converter is downloaded from the remote headend.... | 12/10/1985 |
| 4558358 | Cable network monitoring system for CATV system A CATV system includes terminal units with which two-way data communication with a central terminal is possible. A cable network monitoring system is capable of assisting in the location of faults by sending data such as the received signal strength at va... | 12/10/1985 |
| 4538176 | Buffer memory dispersion type video/audio transmission system A video/audio transmission system for sending video and audio information from video and audio files of a center to a subscriber through a subscriber's junction line is disclosed in which at least one subcenter having a video/audio buffer memory, an excha... | 08/27/1985 |
| 4538174 | Two-way subscriber TV system with multiple subscriber's sets A communications system comprising at least one exchange, television signal sources located at the exchange, subscriber's units each connected to the exchange by a respective direct communications link and provided with a television signal receiver, and s... | 08/27/1985 |
| 4521806 | Recorded program communication system A plurality of recorded audio/video signal sources of a program library sequentially transmit segments of a broadcast signal within a time compressed transmission period through a common signal carrier path to a plurality of subscriber stations at which s... | 06/04/1985 |
| 4512033 | Remote level adjustment system for use in a multi-terminal communications system A remote level adjustment system for use in a multi-terminal communications system wherein a plurality of remote terminals are connected to a master terminal by a distribution network for bi-directional transmission of signals. The remote terminals are ad... | 04/16/1985 |
| 4506387 | Programming-on-demand cable system and method A programming-on-demand cable system is provided which allows any one of a plurality of individual users to request anyone of a plurality of video programs they wish to view from a library of programs, and permits the requested program to be available for... | 03/19/1985 |
| 4494111 | Frequency agile security apparatus A cable TV security system utilizes three radio frequency signals as three data communication channels: one downstream channel and two upstream channels. A headend alarm processor transmits system commands on the downstream channel. A plurality of subscri... | 01/15/1985 |
| 4494138 | Segmented upstream management for cable television A segmented upstream management system for a bidirectional coaxial network of the type including a bidirectional trunk (14) having a plurality of bidirectional feeders (12) and a plurality of drops (10) is disclosed. The management system includes a numbe... | 01/15/1985 |
| 4484218 | Video distribution control system A subscriber distribution terminal is connected to the transmission medium for serving a group of subscribers. Within the distribution control terminal is located a plurality of television converters. A local oscillator in each of the converters is contro... | 11/20/1984 |
| 4475121 | Polling pattern generator for CATV system A polling pattern generator system for use in a CATV system including a polling pattern generator and a passive data monitor. The polling pattern generator periodically generates polling pattern signals each of which has a specific address code for callin... | 10/02/1984 |
| 4454538 | Data communication in CATV system A CATV system having a central facility connected through cables to a number of terminal units to establish two-way data communication. Each terminal unit includes a PLL that oscillates at a frequency corresponding to a channel selected. A frequency divid... | 06/12/1984 |
| 4408345 | Remote line monitoring method and device for CATV system A remote line monitoring device and method for a CATV system in which a center facility is connected to plural terminal units through cables of the system to transmit television signals to subscribers' homes. A plurality of monitoring terminal units are p... | 10/04/1983 |
| 4402008 | Wideband switching architecture A communication method and wideband switching network in which wideband signals are communicated through the network with minimal crosstalk between the wideband signals. Minimal crosstalk is achieved by a network architecture and by grounding both ends of... | 08/30/1983 |
| 4386424 | Broad band telecommunication system In an exemplary embodiment, subscriber lines are formed by means of light waveguides and transmit pulse-modulated TV signals in time-division multiplex. These pulse-modulated signals are converted into PAM signals at the subscriber side, from whose freque... | 05/31/1983 |
| 4385314 | Polling pattern generator for CATV system A polling pattern generator system for use in a CATV system including a polling pattern generator and a passive data monitor. The polling pattern generator periodically generates polling pattern signals each of which has a specific address code for callin... | 05/24/1983 |
| 4365267 | Passive data monitor for use with polling pattern generator in CATV system A polling pattern generator system for use in a CATV system including a polling pattern generator and a passive data monitor. The polling pattern generator periodically generates polling pattern signals each of which has a specific address code for callin... | 12/21/1982 |
| 4361730 | Security terminal for use with two-way interactive cable system A security terminal for use with a two-way interactive cable system. The security terminal develops alarm and supervisory signals, and controls their transmission over the cable when polled by a central station. The terminal discriminates between four dif... | 11/30/1982 |
| 4360828 | Hotel/motel power load control and bilateral signalling apparatus Head end apparatus delivers video signals, e.g., premium and standard television programming to distinct locations such as hotel/motel rooms, an apartment or the like via a common MATV cable. The head end also transmits digital messages to receivers at ea... | 11/23/1982 |
| 4347604 | Bi-directional data communications system A bi-directional data communications system including a single center facility and plural terminal control devices. A pair of up-data and down-data lines connect the central facility and the plural terminal control devices. Each of the terminal control de... | 08/31/1982 |
| 4295154 | Digital video and audio file system A digital video and audio file system is provided for use in systems such as a center-to-end video communication system. In the file system, video information, such as a color television video signal, is digitized in such a manner that it is separated int... | 10/13/1981 |
| 4290142 | Interactive cable television system An interactive cable television system for serving a plurality of user locations in a service area divided into a plurality of service regions, including a central office and a service network having a portion composed of parallel cables arranged in a tre... | 09/15/1981 |
| 4245245 | Interactive CATV system A two-way CATV system having a substantial number of terminals incorporates a central processor and transmitter system which continually interrogates the terminals at high speed, monitoring changes of usage of premium programs and other data while also pe... | 01/13/1981 |
| 4079414 | Interrogated transponder system Method for selectively interrogating decoding devices which are located at remote stations. In one embodiment, a number of transponders which make up a final group within a larger group of transponders, all attached to a common line running from a central... | 03/14/1978 |
| 4057829 | Communications TV monitoring and control system A communications control system applicable to an existing master antenna television (MATV) system normally installed in a building, or CATV systems that use special entertainment feature inputs including movies and/or sporting events and special services ... | 11/08/1977 |
| 4008369 | Telephone interfaced subscription cable television system especially useful in hotels and motels 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 to one or more subscriber terminals and associated tel... | 02/15/1977 |
| 4002843 | Tamper-proof two-way cable system There is disclosed a two-way cable system in which the deliberate introduction of continuous upstream message interference at any subscriber terminal does not destroy the efficacy of the system. Each subscriber terminal is coupled through an interface uni... | 01/11/1977 |
| 3997718 | Premium interactive communication system A cable television and communication system is disclosed which is suitable for community antenna television (CATV) closed circuit television (CCTV) and other types of signal distribution systems with service function applications such as for use in hotel,... | 12/14/1976 |
