Matches 251 - 290 out of 290 < 1 2 3 4 5 6
Match Document Document Title
6035044 Scrambling type method and apparatus for video transmission/receipt  
A scrambling type video transmitting/receiving method feasible for digital television broadcasting and an apparatus therefor are disclosed. A video transmitter executes soft scrambling with an...
5930361 Video inversion detection apparatus and method  
An apparatus/method for descrambling a TV cable system transmission that been scrambled using an unknown scrambling algorithm. Insertion apparatus inserts a known visual/electrical characteristic...
5930360 Method of scrambling three-dimensional image  
In a method of scrambling a three-dimensional image according to the present invention, the phase of a part of at least one of a left eye image and a right eye image constituting a...
5926547 Method and apparatus for providing program/component redundancy in headend  
In a communications system, a headend is provided with redundancy circuitry for video receivers, decoders, and modulation circuitry. The devices in the headend are monitored for failure, and when...
5920625 Method and apparatus for transmitting and receiving encrypted signals  
An encrypted signal compatible with first and second encryption systems is generated by producing encryption data signals relating to each encryption system. A difference signal is derived from the...
5920626 Analog/digital system for television services  
A combined IRD scrambler/modulator is provided in a headend. A service provider transmits a digital program signal in a digital data stream to a headend which distributes analog program signal to...
5848157 System for the shifting of a television signal scrambler  
The shifting system comprises a local scrambler (13) on a production site giving the necessary digital data elements to a scrambler (15) shifted to a transmission site. These data elements are...
5787171 Data transmitter and receiver  
A data transmitter capable of preventing illegal free reception of transmitted data by scrambling the same, and a data receiver adapted to descramble the received data properly despite any...
5699104 Broadcast channel lock system  
A broadcasting channel lock system including a broadcasting device for transmitting a broadcasting signal via one or more of a plurality of channels, and a receiving device for receiving the...
5644354 Interactive video system  
A method of transmitting data for video display in which a composite digital information signal is manipulated to produce an output signal including data code and object code, separately storing...
5636278 Player for picture concealment and concealment release  
A player for concealing a picture or releasing picture concealment using a secret code provided by a user while recording and/or reproducing of a video signal with respect to a recording medium...
5553140 Digital and analog interface for set back box  
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...
5504934 Satellite communication receiving device capable of automatically dealing with frequent change of an assigned channel  
In a satellite communication receiving device which is for use in a network having a network number and comprises a tuner section (24) for receiving a first communication signal as a received...
5463656 System for conducting video communications over satellite communication link with aircraft having physically compact, effectively conformal, phased array antenna  
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...
5351292 Method and apparatus for preventing external detection of signal information  
In a method and an apparatus for preventing external detection of the signal information in video signals occurring in, and being emitted from, video signal circuits in a display unit, or a similar...
RE34720 Television signal enhancement and scrambling system  
A television signal is distorted by passing it through a distortion amplifier which applies a Gaussian distortion curve to the signal. The curve has a maximum increase in amplitude of about 38 dB,...
5321747 Method and apparatus for preventing extraneous detection of signal information  
In a method of preventing extraneous detection of signal information from raster scan signals in a plurality of consecutive line signals intended to form an image or partial images there is...
5311543 Television transmission system using two stages of spead-spectrum processing  
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...
5235643 Satellite receiver retuning system  
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...
5214694 Scramble signal transmission system for earth station of communication satellite  
A system for transmitting a scramble signal for a sky port scramble system including an organization center for organizing data relating to customers etc. and first and second control units each...
5185793 Method and apparatus for securing television signals using sideband interdiction  
A method and apparatus for securing a television transmission signal from unauthorized reception is disclosed that employs a sideband interdiction technique. A portion of the signal's sideband...
5151782 Control system for satellite delivered pay-per-view television system  
In a system including an originating source for providing multiple television programs to one or more local cable television systems for their distribution on a pay-per-view basis, data processing...
5138659 Conversion of television signal formats with retention of common control data stream  
Television signals are converted from a first format to a plurality of different formats while retaining a common control data stream. A first television signal in a first format is separated into...
5113443 Method for scrambling satellite communications  
A secure communications system multiplexes segments of the information signal for keyed encoding and modulation onto a plurality of different carrier frequencies and/or polarizations, and transmits...
4993066 Method for television scrambling  
A method and device for inexpensively and efficiently controlling the distribution of pay-per-access information services is disclosed including varying scrambling methods and user exchangeable cards.
4992868 True information television (TITV) and vision system  
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...
4961109 Chargeable program receiving limit setting system in two-way cable television system  
A CATV television system in which a subscriber can only charge a maximum number of events before the central facility polls the subscriber's terminal unit for charged events. The subscriber's...
4905280 High security videotext and videogame system  
A pay per use system allows the broadcast of television, videotext, and videogame programming all in the same system. The programming is broadcast in scrambled form with a broadcast signal imbedded...
4893248 Monitoring and reporting system for remote terminals  
A system is disclosed for monitoring and accumulating data indicative of viewer authorized pay per view TV programs at each of a plurality of remote terminals, wherein each remote terminal is...
4870682 Television scrambling system  
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...
4796297 Device for calculating a charge for a charged information signal with errors avoided in a report of the charge  
The amount of money which should be charged upon reception of a pay television signal or a like information signal, is calculated by a charging device comprising a calculator (25) for calculating...
4790010 Enhanced scrambling method and system for TV signals  
A television signal transmission system includes a cable head-end having a scrambler for scrambling a television signal and a subscriber decoder having an unscrambler for unscrambling the...
4776013 Method and apparatus of encryption of optical images  
A method of encoding an optical image comprises: converting the optical iamge to an image grid comprised of an image matrix of pixels each having at least two possible intensity values; providing a...
4677685 Method and apparatus for downloading a code defining the channel transmission format employed in an addressable CATV system  
A tuning mode command identifying the channel transmission format being used in an addressable CATV system is transmitted via a plurality of encoded CATV channels for downloading in subscriber home...
4648122 Community antenna television communication system  
A CATV system in which first and second terminal units are provided, connected in series via a transmission line, whereby the first transmission unit effects communiction with a control center...
4617597 Compatible color television with regenerable signals  
Novel means are disclosed for conditioning a standard color-television composite signal, such as the NTSC composite, so that pictorial information is represented according to Nyquist samples which...
4554579 Two-way CATV system with AML commands  
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...
4550341 Unauthorized observation preventing device for CATV system  
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...
4386416 Data compression, encryption, and in-line transmission system  
An in-line data compression system which reduces the number of binary bits required to transmit a given text or similar message over a data network such as Telex or TWX. The compression unit can...
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...
Matches 251 - 290 out of 290 < 1 2 3 4 5 6