| 6301663 |
Copy protection apparatus and information recording medium used in this copy protection apparatus |
| Oct-9-2001 |
This invention protects the unauthorized copy of multimedia data, recorded on an information recording medium, by using electronic watermark information and key information. The electronic watermark information... |
| 6295360 |
Method and apparatus to defeat composite video signal protection |
| Sep-25-2001 |
A VGA (or other component video signal) output, e.g. from a computer or DVD player, is subject to protection so it is viewable on a VGA monitor. If the component video signal is converted to composite... |
| 6282310 |
Image processing apparatus, method, and image processing system |
| Aug-28-2001 |
An image processing circuit of an image processor performs predetermined image processes on input image data from an external device. A data scrambling circuit scrambles the processed image data in accordance... |
| 6246767 |
Source authentication of download information in a conditional access system |
| Jun-12-2001 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6243469 |
Information transmission method and apparatus |
| Jun-5-2001 |
The present invention provides an information transmission apparatus and method for an information transmission system where encrypted information comprised of a plurality of information units each hierarchically... |
| 6243465 |
Method of providing video programming nearly on demand |
| Jun-5-2001 |
A method for providing video programming in a nearly on demand basis is disclosed. A video network includes a video server that operates several video recorders to simultaneously exhibit video performances... |
| 6240185 |
Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels |
| May-29-2001 |
Electronic steganographic techniques can be used to encode a rights management control signal onto an information signal carried over an insecure communications channel. Steganographic techniques ensure... |
| 6222924 |
Scrambling of digital media objects in connection with transmission and storage |
| Apr-24-2001 |
To prevent unauthorized reception, storage, copying and reproduction of digital media objects it is defined in addition to a scrambled broadcast format a scrambled storage format which is different from... |
| 6219422 |
Data transmitting apparatus, receiving apparatus, and data transmission and reception system |
| Apr-17-2001 |
Video and audio data of a plurality of received programs and a common information ECM are recorded to a recording medium. A recording position of the program is written on a management table. When reproducing... |
| 6215875 |
Cipher processing system |
| Apr-10-2001 |
A cipher processing apparatus which readily updates a cipher processing circuit for encrypting information communicated through a communication function. A service station side and a user side are connected.... |
| 6208737 |
Method and apparatus for television signal scrambling using the replacement of synchronizing and color subcarrier signals with an alternative time base inherent in a QPSK audio subcarrier |
| Mar-27-2001 |
A novel method and apparatus for scrambling a television signal includes using a synchronization separator to separate a synchronization signal from an input audio-visual signal. The synchronization signal... |
| 6198822 |
Enhanced scrambling of slowly changing video signals |
| Mar-6-2001 |
An enhanced scrambled video signal, method for making an enhanced scrambled video signal and apparatus for enhanced scrambling of a video signal are all characterized by a pattern added to a video signal.... |
| 6167136 |
Method for preventing copying of digital video disks |
| Dec-26-2000 |
A method for securely storing analog or digital data on a data storage medium. An analog information signal is combined with a noise signal. The composite noise and information signal is encrypted with... |
| 6160889 |
Image encoding method, image decoding method and image signal recording medium |
| Dec-12-2000 |
Scrambling is performed without deteriorating the quality of an image encoded by an MPEG method and in which the MPEG standard is used as it is. When a digital image signal formed of a luminance signal... |
| 6158026 |
Scrambling apparatus, method thereof, descrambling apparatus, and method thereof |
| Dec-5-2000 |
A G circuit is based on a matrix of a generated polynomial for generating an M sequence of eight degrees. The matrix is squared and thereby a G.sup.2 circuit is obtained. 16-bit data is divided into high... |
| 6157719 |
Conditional access system |
| Dec-5-2000 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6118872 |
Apparatus and method for controlling secret data by using positions of input image points on an image and a sequence of the positions |
| Sep-12-2000 |
A secret data management apparatus includes an image display unit which displays an image on a display monitor. A position/sequence input unit inputs positions of input image points on the image using... |
| 6097816 |
Crypt key system |
| Aug-1-2000 |
A crypt key system for decrypting encrypted data for use, by a permit key including a decryption key, comprising a database/charging center, a broadcasting station, a receiving device and a communication... |
| 6091822 |
Method and apparatus for recording scrambled video audio signals and playing back said video signal, descrambled, within a secure environment |
| Jul-18-2000 |
A technique is disclosed for preventing unauthorized playback of scrambled video/audio signals recorded on, for example, a video tape cassette, which technique includes several cooperating processes and... |
| 6081599 |
Saw television scrambling system |
| Jun-27-2000 |
A television scrambling system in which a television signal is scrambled by means of placing a scrambling (or jamming) signal into the luminance signal spectrum on the transmit side. On the receive side,... |
| 6072873 |
Digital video broadcasting |
| Jun-6-2000 |
In order to implement the Digital Video Broadcasting descrambling algorithm in the context of MPEG compressed data streams containing interleaved sections of scrambled and unscrambled data, at a data rate... |
| 6069957 |
Method and apparatus for providing hierarchical key system in restricted-access television system |
| May-30-2000 |
An encryption system for restricted-access television systems. Decryption keys, which are used to decrypt program material, are transmitted to customers in a restricted-access television system. The keys... |
| 6038321 |
Data transfer method, communication system and storage medium |
| Mar-14-2000 |
In a communication system, a transmitter device encrypts variable-length data having a data length corresponding to a kind of information to be transferred or a communication capacity, using a natural... |
| 6035044 |
Scrambling type method and apparatus for video transmission/receipt |
| Mar-7-2000 |
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 original... |
| 5930360 |
Method of scrambling three-dimensional image |
| Jul-27-1999 |
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 three-dimensional image... |
| 5930361 |
Video inversion detection apparatus and method |
| Jul-27-1999 |
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 into... |
| 5926547 |
Method and apparatus for providing program/component redundancy in headend |
| Jul-20-1999 |
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 they... |
| 5920626 |
Analog/digital system for television services |
| Jul-6-1999 |
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 at least... |
| 5920625 |
Method and apparatus for transmitting and receiving encrypted signals |
| Jul-6-1999 |
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 two... |
| 5917915 |
Scramble/descramble method and apparatus for data broadcasting |
| Jun-29-1999 |
A transmitter for transmitting news data via satellite and which includes an information storage unit for storing news data, an information scramble processing unit for scrambling the news data using a... |
| 5862219 |
Cable television setback decoder automatic control |
| Jan-19-1999 |
A setback decoder monitors the IF output from a cable-ready receiver and automatically provides a descrambled audio/video signal back to the receiver for output to the subscriber. When the receiver is... |
| 5848157 |
System for the shifting of a television signal scrambler |
| Dec-8-1998 |
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 inserted,... |
| 5787171 |
Data transmitter and receiver |
| Jul-28-1998 |
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 alteration of... |
| 5699104 |
Broadcast channel lock system |
| Dec-16-1997 |
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 broadcasting... |
| 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... |
| 5636278 |
Player for picture concealment and concealment release |
| Jun-3-1997 |
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 includes... |
| 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... |
| 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... |
| 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... |
| 5463656 |
System for conducting video communications over satellite communication link with aircraft having physically compact, effectively conformal, phased array antenna |
| Oct-31-1995 |
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 satellite... |
| 5351292 |
Method and apparatus for preventing external detection of signal information |
| Sep-27-1994 |
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 unit,... |
| 5321747 |
Method and apparatus for preventing extraneous detection of signal information |
| Jun-14-1994 |
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 generated a... |
| 5311543 |
Television transmission system using two stages of spead-spectrum processing |
| May-10-1994 |
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 somewhat imperfect... |
| 5235643 |
Satellite receiver retuning system |
| Aug-10-1993 |
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 a video... |
| 5216713 |
Method and apparatus for preventing extraneous detection of signal information |
| Jun-1-1993 |
In a extraneous of signal method of preventing 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 generated... |
| 5214694 |
Scramble signal transmission system for earth station of communication satellite |
| May-25-1993 |
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 having... |
| 5185793 |
Method and apparatus for securing television signals using sideband interdiction |
| Feb-9-1993 |
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 content... |
| 5157725 |
Method and apparatus for preventing external detection of signal information |
| Oct-20-1992 |
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 (A, A'), or a similar... |
| 5151782 |
Control system for satellite delivered pay-per-view television system |
| Sep-29-1992 |
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 equipment... |
| 5138659 |
Conversion of television signal formats with retention of common control data stream |
| Aug-11-1992 |
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 a first... |
