| 5161194 |
Satellite communications system operating in asynchronous mode for central-to-terminal station transmission |
| Nov-3-1992 |
In a satellite communications system, a unique word is transmitted from a central station at frame intervals to the satellite and broadcast to terminal stations. Blocks of data from the central station... |
| 5504934 |
Satellite communication receiving device capable of automatically dealing with frequent change of an assigned channel |
| Apr-2-1996 |
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 signal from... |
| 5321750 |
Restricted information distribution system apparatus and methods |
| Jun-14-1994 |
A system for securely providing restricted display information having an encoder-transmitter for transmitting selected update data using information identification codes as enabling reception keys and... |
| 4817142 |
Restoring framing in a communications system |
| Mar-28-1989 |
A secure communications system requires special arrangements for the establishment and maintenance of framing and synchronization. A framing word is transmitted at a fixed frequency, and a key necessary... |
| 6212278 |
Reprogrammable subscriber terminal |
| Apr-3-2001 |
A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The... |
| 4797919 |
Receiver having an interface with a sub-system |
| Jan-10-1989 |
A receiver having an interface arrangement for connection between a television circuit and a conditional access sub-system conveys data via a bus having a four frame bus cycle period with a bit rate corresponding... |
| 5270822 |
Receiver control circuit for a television for controlling programs to be supplied for viewing |
| Dec-14-1993 |
A receiver control circuit for a television, includes a main receiving part, a first receiving circuit, a driving control part, and a comparing part, wherein the main receiving part receives television... |
| 5309514 |
Pulse generator including a memory for storing pulses for modulation on a carrier of a television signal |
| May-3-1994 |
A pulse generator for generating pulses for modulation onto a carrier or subcarrier of a composite television signal is provided. The pulse generator includes a memory such as an EPROM for storing one... |
| 5953418 |
Providing selective data broadcast receiver addressability |
| Sep-14-1999 |
A method of transmitting data to a plurality of receivers is provided wherein an identifier is assigned to each of the receivers that cannot be ascertained once assigned, a subset of receivers is selected... |
| 5301233 |
Process for the transmission and reception of personalized programs |
| Apr-5-1994 |
A process for the transmission and reception of personalized programs. The program is constituted by personalized program elements containing an identification of the recipient or addressee, the access... |
| 6438432 |
Process for the protection of stored program controls from overwriting |
| Aug-20-2002 |
A method is provided for protecting stored-program control systems, in particular in motor vehicles, which offers a software protection system for programming. A programming routine for programming by... |
| 4947428 |
Process for the broadcasting and reception of access title control messages |
| Aug-7-1990 |
According to the invention, the control messages are constituted by a general addressing message (GCM), followed by shared addressing messages (SACM). The message (GCM) contains all the information common... |
| 3997718 |
Premium interactive communication system |
| Dec-14-1976 |
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... |
| 7020284 |
Perceptual encryption and decryption of movies |
| Mar-28-2006 |
The present invention is a combined encoder and perceptual encrypter for a file of high quality video. The combined encoder and perceptual encrypter includes an encoder and perceptual encrypter. The encoder... |
| 4245246 |
Pay TV system |
| Jan-13-1981 |
An apparatus for coding video information arranged in a plurality of lines comprises means for selectively inverting video information in groups of lines. A random timing device controls the number of... |
| 4688247 |
Pay TV scrambling by audio encryption |
| Aug-18-1987 |
A subscription television distribution system provides a plurality of sources of television program channels, each of which include a video signal and an encrypted audio signal with the encrypted audio... |
| 5504933 |
Pay broadcasting system |
| Apr-2-1996 |
A system for the so-called "pay-per-program" is provided for viewing individual program on pay basis without signing a comprehensive contract. In response to a request for viewing a pay program executed... |
| 4365267 |
Passive data monitor for use with polling pattern generator in CATV system |
| Dec-21-1982 |
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... |
| 5485198 |
Multiple channel decoding device for TV systems |
| Jan-16-1996 |
A decoding device for use in television systems having coded channels includes a tap and decoding blocks arranged in parallel for simultaneously decoding a plurality of channels. The decoding device may... |
| 4893248 |
Monitoring and reporting system for remote terminals |
| Jan-9-1990 |
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 coupled illustratively... |
| 5675646 |
Method of writing identification number of electronic apparatus |
| Oct-7-1997 |
The present invention involves a method of writing an identification number of a CATV receiving apparatus and intends to achieve a rapid write operation and reduction in the capacity of a control program.... |
| 5381477 |
Method of selecting cable television converter groups |
| Jan-10-1995 |
A method of selecting individual subscribers for inclusion in groups by means of certain selection criteria comprises the steps of storing criteria related to terminals of a subscription television system,... |
| 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... |
| 4613902 |
Method of broadcasting an encoded video signal and a receiving apparatus for decoding the signal |
| Sep-23-1986 |
A video signal is encoded prior to broadcasting by inverting portions of the signal about an encoding axis at a predetermined reference level. To enable the reference level to be determined accurately... |
| 4965826 |
Method of and system for scrambling/descrambling sound |
| Oct-23-1990 |
A method of and system for scrambling/descrambling audio transmission in which periods of silence in the sound to be transmitted are detected and utilized to trigger immediately changing the scrambling... |
| 6944299 |
Method for synchronous encryption over a communication medium |
| Sep-13-2005 |
An apparatus and method provide for synchronized operation of encryption processes at two remote communication terminals. A first one of the terminals detects information associated with a current time... |
| 5581614 |
Method for encrypting and embedding information in a video program |
| Dec-3-1996 |
Apparatus and methods are provided for encrypting and decrypting information having a header portion and a body portion. The decrypting method includes the steps of reading a current month from a clock,... |
| 6266414 |
Method for digital data compression |
| Jul-24-2001 |
A method of creating a wavelet decomposition of a collection of data values is disclosed, the method including the steps of performing an initial decomposition of the data values into a series of components... |
| 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... |
| 6748079 |
Method and system for recording data on and reading data from an optical medium |
| Jun-8-2004 |
Accordingly, an improved method for recording data on an optical medium is disclosed which includes receiving and encoding a first set of data frames by a CIRC encoder to generate a second set of data... |
| 4079419 |
Method and apparatus for transmitting and receiving additional information in a television signal |
| Mar-14-1978 |
Identification of a program being transmitted is encoded digitally on a sub-carrier modulated on the sound carrier of a television signal with each elementary code group occupying a television field interval,... |
| 4890322 |
Method and apparatus for subscription broadcast |
| Dec-26-1989 |
The system (10) provides a way of utilizing announcement distribution service equipment (21) which is presently in use in telecommunications networks (20) for ordering television or other signals (23)... |
| 5828402 |
Method and apparatus for selectively blocking audio and video signals |
| Oct-27-1998 |
A method and apparatus block the reception of television programming which meets specified criteria. Data packets describing television programming are broadcast with the television signal. The data packets... |
| 4045814 |
Method and apparatus for scrambling and unscrambling communication signals |
| Aug-30-1977 |
Method and apparatus for scrambling and unscrambling television video and audio signals in a subscription television system in which program selections of subscribers are known at a central transmitting... |
| 4019201 |
Method and apparatus for scrambling and unscrambling communication signals |
| Apr-19-1977 |
Method and apparatus for scrambling and unscrambling television video and audio signals in a subscription television system in which program selections of subscribers are known at a central transmitting... |
| 5841863 |
Method and apparatus for scrambling and descrambling of video signals with edge fill |
| Nov-24-1998 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 5844988 |
Method and apparatus for scrambling and descrambling of video signal with edge fill |
| Dec-1-1998 |
A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line,... |
| 5594492 |
Method and apparatus for rapid channel selection |
| Jan-14-1997 |
In a video distribution system, methods and apparatus for rapid channel selection are implemented to reduce the channel-to-channel latencies which might otherwise occur in modern video decoding systems,... |
| 5604528 |
Method and apparatus for providing periodic subscription television services |
| Feb-18-1997 |
A method and apparatus for providing periodic subscription television services comprises a way for subscribers who cannot afford the fees for full time television services such as a regular cable television... |
| 5311325 |
Method and apparatus for providing periodic subscription television services |
| May-10-1994 |
A method and apparatus for providing periodic subscription television services comprises a way for subscribers who cannot afford the fees for full time television services such as a regular cable television... |
| 5058157 |
Method and apparatus for encrypting and decrypting time domain signals |
| Oct-15-1991 |
A technique for encrypting and decrypting information signals normally arranged as a succession of lines of active information, with each line having a line timing reference, such as color video information... |
| 4916736 |
Method and apparatus for encrypting and decrypting time domain signals |
| Apr-10-1990 |
Time sequential information signals, such as color video signals having a line timing reference and an active video portion, are encrypted by time shifting the active video signal portion towards and away... |
| 4677685 |
Method and apparatus for downloading a code defining the channel transmission format employed in an addressable CATV system |
| Jun-30-1987 |
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 terminals.... |
| 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... |
| 5719618 |
Locking method for a system with an on screen display function and apparatus therefor |
| Feb-17-1998 |
A locking method for system with OSD function is disclosed, which comprises; a procedure of waiting for the lock-function call; a procedure of storing and displaying the inputted secret code by using the... |
| 4365249 |
Line monitoring device in two-way data communication system |
| Dec-21-1982 |
A line monitoring device for use in a two-way data communication system such as a CATV system in which up-signals are transmitted by terminal units in response to retrieving signals applied thereto from... |
| 5230019 |
Key signal conversion device for CATV system |
| Jul-20-1993 |
A key signal conversion device for use in a CATV television system in which more than one different scrambling process is performed, the conversion device receiving one of a scrambled high-frequency signal... |
| 6587561 |
Key delivery in a secure broadcasting system |
| Jul-1-2003 |
A key delivery method for use in an encoded communications system in which at least one encoded item including a first item encoded with a first item control word is sent in a communication stream from... |
| 5644354 |
Interactive video system |
| Jul-1-1997 |
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 the data... |
| 5093921 |
Initialization technique and apparatus for set top converters |
| Mar-3-1992 |
A CATV/MDS set top converter installation process is performed at the installation site without access to any internal components of the converter. The process is performed in two stages. In the first... |
