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| Number | Title | Issue Date |
| 5881245 | Method and apparatus for transmitting MPEG data at an adaptive data rate A method and device for communicating encoded data (such as MPEG encoded data for example) from a server to a decoder via a buffer. The rate at which the server provides the encoded data are adjusted based on a state of the buffer such that the buffer doe... | 03/09/1999 |
| 5847749 | Video reporting system for enabling real-time, unidirectional data transmission from mobile sources Video on Demand allows, for example, a coded TV signal or film to be transmitted to a subscriber over a standard two-wire metallic telephone line. A similar apparatus for connecting unidirectional mobile data output to a destination via a standard metalli... | 12/08/1998 |
| 5841467 | Ground isolation circuit for isolating a transmission line from ground interference An isolation circuit is disclosed for isolating ground interference from a wideband transmission signal. The ground isolation circuit of the present invention is constructed using a pair of matched mixer circuits, each of which receives a carrier signal f... | 11/24/1998 |
| 5834989 | Circuitry for use with coaxial cable distribution networks with a ground plane near the ports A conducting housing (to be closed by a lid) for a coaxial cable distribution network has a common port and one of an aerial or pedestal port. A motherboard carries an RF circuit and a transfer switch. In one setting of the transfer switch the RF circuit ... | 11/10/1998 |
| 5768375 | CATV system An image-data-system host computer outputs image data, the protocol of which is not disclosed. The image data outputted from the image-data-system host computer is transmitted via an image-data-system terminal and a video control unit to a data management... | 06/16/1998 |
| 5675371 | Apparatus for monitoring cable television system remote equipment performance and status using a cell modem A wireless remote data sensor for use in the cable television industry. It senses the status of equipment in the field, such as battery backup power equipment, amplifiers, pilot and signal level monitors, and voltage level for powering active equipment, a... | 10/07/1997 |
| 5614939 | Coaxial cable service interrupter Disclosed is a circuit and system for preventing tampering with services provided in a broadband transmission network. A coaxial relay is coupled between a cable providing signals in the network and the drop cable to the customer's premises. The coil whic... | 03/25/1997 |
| 5614955 | Compressed digital multi-channel video communications system having one or more auxiliary channels to accomodate high bit rates A compressed digital multi-channel video communications system having at least one auxiliary channel. The other channels are assigned to respective program sources. These channels are prioritized. The auxiliary channel works with the assigned channel whic... | 03/25/1997 |
| 5599190 | Communication wiring system including a reconfigurable outlet assembly A communications wiring system includes a communications network interface device for routing a plurality of source signals between respective ones of a plurality of types of electrical sources and a number of reconfigurable outlet assemblies. Each reconf... | 02/04/1997 |
| 5539657 | Picture image distributing apparatus provided within passenger moving vehicle A picture image distributing apparatus provided within a passenger moving vehicle, consists of: a head end portion for multichannel FDM picture image signals; an electrical optical for converting the FDM picture image signals into optical signals; an opti... | 07/23/1996 |
| 5530471 | Radio and television distribution system A distribution system, useful with radio and television distribution, for distributing a signal having a plurality of channels includes a central station. The central station produces a first frequency division multiplexed signal in which signals from a p... | 06/25/1996 |
| 5467384 | Method and apparatus for providing power to a coaxial cable network A fiber optic/coaxial cable telephony network including power. Power is supplied through the coaxial cable portion of the video network to an cable network unit where the power is converted and supplied to the equipment including customer premises equipme... | 11/14/1995 |
| 5452009 | Digital transmission system with data rate optimized for noise in transmission medium A cable transmission system transmits television signals in a family of M-level symbol data constellations. Lower frequency ones of the television signals are transmitted in data constellations of relatively higher values of M and higher frequency ones of... | 09/19/1995 |
| 5434610 | Methods and apparatus for the reconfiguration of cable television systems A broadband cable television system for delivering broadband cable television signals from a headend to a plurality subscribers includes a bridger module. The bridger module allows upgrading of the system to a much higher channel capacity or to a fiber to... | 07/18/1995 |
| 5382971 | Television signal cable distribution system and assembly of elements for constituting such a system The distribution network (67, 68) comprises as many cables as there are satellite signal sources and terrestrial television signals are added on each of these cables to satellite television signals by utilizing a multiple coupler (66). For each group of u... | 01/17/1995 |
| 5327230 | Video multiplying system A VCR transmission device is disclosed including a transmitting unit capable of receiving a VCR video signal, conditioning the video signal and outputting the video signal onto a home power line ordinarily carrying an AC power signal. The transmitting dev... | 07/05/1994 |
| 5283789 | Communication system providing data and television signals to PC work stations A communication system for transmitting relatively high frequency broadband electrical signals representative of broadband information and for transmitting relatively low frequency baseband electrical signals representative of baseband information. The sy... | 02/01/1994 |
| 5272556 | Optical networks A system for distributing HDTV signals from a head station to a number of customer stations includes a single head-end optical source having a frequency f0 and a modulator arranged to receive light from the single optical source. The modulator ... | 12/21/1993 |
| 5130793 | Reconfigurable multiple-point wired in-house network for simultaneous and/or alternative distribution of several types of signals, notably baseband images, and method for the configuration of a system such as this A transmission line formed by a twisted pair of conductors with at least one input point for connection to a device for injection of a signal into the pair of conductors, and several output points for connection to devices for tapping of the signal transm... | 07/14/1992 |
| 5107360 | Optical transmission of RF subcarriers in adjacent signal bands Apparatus is provided for optically transmitting a plurality of AM modulated RF subcarriers in adjacent octaves. A first laser is modulated to produce a first optical output signal containing a plurality of subcarriers in a first octave. A second laser is... | 04/21/1992 |
| 5045940 | Video/audio transmission systsem and method The invention is a data pipeline system which synchronizes the display of digitzed audio and video data regardless of the speed at which the data was recorded on its linear medium. To do this, the video data is played at a constant speed, synchronized by ... | 09/03/1991 |
| 5008934 | CATV transmission system using scrambled signals A CATV system includes a main head end as a system center and a plurality of subhead ends. A baseband TV signal is transmitted from the main head end to the subhead ends through optical fiber cables. A scrambling data generating means is disposed in the m... | 04/16/1991 |
| 4959862 | Active multichannel video processing hub for optimum transition from fiber to coax 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 large bandwidth capability. Larger distances can be c... | 09/25/1990 |
| 4878245 | Control and metering system for pay television over a cable network 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 unit is located external to the subscribers ho... | 10/31/1989 |
| 4823386 | Addressable subscriber cable television system 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 controllers coupled to the cable for controlling r... | 04/18/1989 |
| 4733223 | Apparatus for monitoring a communications system Apparatus for monitoring the status of and controlling faults at remotely-located components in a single line communications system wherein return data signals from the components are transmitted in the 50 kHz to 200 kHz range, and coupled to the low pass... | 03/22/1988 |
| 4627105 | Signal transmission system and method A sub-center type switched-star CATV system network in which a number of transmission signals are transmitted from a central source to a number of sub-centers over a number of sets of optical fibers. In view of the long distances involved, the transmissio... | 12/02/1986 |
| 4621282 | Transmitting stereo audio programs in cable TV systems Stereo audio signals are transmitted over optical fibres in a cable TV system in which stereo radio signals are received and demodulated to produce respective stereo multiplex signals. These stereo multiplex signals are then sampled, digitized and combine... | 11/04/1986 |
| 4586081 | Method and apparatus for secure audio channel transmission in a CATV system A secure audio channel transmission system method and apparatus in which an FM signal is generated on an FM broadcast frequency, such as 107.5 megahertz, divided in frequency by 2 and distributed via a cable television system to subscribers equipped with ... | 04/29/1986 |
| 4532543 | High channel density community antenna arrangement having low intermodulation products A frequency-conversion arrangement (C1 -Cj, l1 -lk) is connected to a distribution network (II, III) for converting the channel frequency distribution of television signals from an input channel pattern, to an o... | 07/30/1985 |
| 4412245 | Differential current detector in cable television trunk amplifier station A voltage comparator compares the DC current in active elements of a trunk amplifier with a variable reference voltage for detecting when to switch to a bypass mode. Its output is normally low for passing a current through it, an LED, and relay coils when... | 10/25/1983 |
| 4313132 | Cable TV security means Security means for cable television operators includes an enabling circuit which is located outside of the subscriber premises and is connected in circuit through the television cable with the power supply of the subscriber's cable television converter lo... | 01/26/1982 |
| 4251691 | Picture/audio signal transmission system A center-to-end type information service system utilizing the public telephone networks that are fundamental communication media of nation-wide scale is disclosed in which desired information is requested from the terminal side to the center by means of a... | 02/17/1981 |
| 4200839 | Wired television broadcasting systems A wired television broadcasting system is disclosed in which a plurality of programme signals are made available on separate conductive paths to each of a plurality of programme selectors controllable by respective subscribers to the system, the conductiv... | 04/29/1980 |
| 4135202 | Broadcasting systems with fibre optic transmission lines A wired broadcasting system is provided in which a signal path between a central station and at least some of a plurality of subscribers includes an optical fibre extending between an electro-optical transducer and a photo-sensitive detector. The optical ... | 01/16/1979 |
| 4120003 | Multiple channel CATV system utilizing row grabber interface as CATV input An improved multichannel CATV type television system includes a real time frame grabbing system for substantially instantaneously providing a selectable continuous video displayable frame of video information to a video interface, such as a row grabbing t... | 10/10/1978 |
| 4099123 | Electrical multi-channel signal transmission systems In an electrical multi-channel signal transmission system having channels with signal carriers of predetermined frequencies, each frequency is an integral multiple of a constant which is a measure of frequency spacing between channels with the addition or... | 07/04/1978 |
| 4054910 | Communication system for the transmission of closed circuit television over an ordinary pair of wires A communication system is provided which allows closed circuit television pictures to be transmitted from conventional TV cameras to conventional monitors via an ordinary pair of wires, for example, telephone wires, lamp cord, BX cable, etc., over limited... | 10/18/1977 |
| 3978282 | Apparatus and method for measuring the transmission characteristics of a network A substantially non-interfering, low-intensity sweeping test signal is transmitted along a network to be tested. Means are provided for receiving and tracking the test signal at the opposite end of the network. A reference signal is transmitted along with... | 08/31/1976 |
