| 7023992 |
Data multiplexing device, program distribution system, program transmission system, pay broadcast system, program transmission method, conditional access system, and data reception device |
| Apr-4-2006 |
In a data multiplexing device which multiplexes and transmits the transport stream packets of program data consisting of a plurality of data elements constructed in the form of transport stream packets,... |
| 7003670 |
Biometric rights management system |
| Feb-21-2006 |
An apparatus and method for using biometric information to control access to digital media that is obtained over a network such as the Internet. Encryption, techniques are used in combination with biometric... |
| 6996236 |
Methods and apparatus for protecting signals transmitted between a source and destination device over multiple signal lines |
| Feb-7-2006 |
Methods and apparatus for protecting copyrighted information, e.g., video signals, from unauthorized use are described. Encrypted video signals are transmitted from a source device, e.g., display adapter,... |
| 6993131 |
Method and system for managing rights in digital information over a network |
| Jan-31-2006 |
A method and system for distributing digital information is disclosed. Preferably, a user acquires a tangible object which contain a code authorizing access to the digital information. The user reads the... |
| 6990203 |
Cable television setback decoder automatic control |
| Jan-24-2006 |
A receiver which receives a multichannel signal and which detects and outputs an unscrambled desired signal to a video display and speaker unit includes a first unit, a second unit and a controller. The... |
| 6983050 |
Methods and apparatus for protecting information content |
| Jan-3-2006 |
Methods and apparatus for protecting copyrighted information, e.g., video signals, from unauthorized coping. Analog red (R), green (G) and blue (B) video signals are transmitted from a source device, e.g.,... |
| 6983049 |
Storage devices for secure scalable data streaming |
| Jan-3-2006 |
A method and system for storing data streamed over a network. Scalably encoded and progressively encrypted data are received by a second device from a first device. The scalably encoded and progressively... |
| 6928165 |
Communication system using digital watermark for synchronizing multiplexed text data to video frames |
| Aug-9-2005 |
A digital video communication system includes, at a source site, an embedding circuit for embedding a digital watermark in a digital video stream to produce a watermarked digital video stream, and a multiplexer... |
| 6885748 |
System and method for protection of digital works |
| Apr-26-2005 |
A method of protecting a digital work uses a format preserving encryption scheme to encrypt the digital work. This enables any native replay application or rendering application to transform an encrypted... |
| 6873853 |
Method and apparatus for providing commercial broadcasting service in cellular mobile communication network |
| Mar-29-2005 |
A method and an apparatus for providing only authorized mobile subscribers with a specified commercial broadcasting service in a cellular mobile communication network. A base station transmits a control... |
| 6871355 |
Conditional access system of CATV |
| Mar-22-2005 |
A CATV conditional access system equipped with a digital head end which transmits picture signals of digital programs in a batch mode to terminals provided within a plurality of areas. This digital head... |
| 6731757 |
Multichannel digital signal generation method and apparatus |
| May-4-2004 |
A method of and apparatus for digitally generating a broadband signal comprising a plurality of CW or quadrature modulated signals having incrementally related frequencies wherein said plurality of signals... |
| 6728271 |
Stream demultiplexing device |
| Apr-27-2004 |
In a stream demultiplexing device, a synchronous clock signal is supplied to a header processing unit only when a header is being inputted and processed in the header processing unit, and supplied to a... |
| 6690797 |
Descrambling device for the use of several conditional access sub-systems |
| Feb-10-2004 |
The descrambling device comprises hardware resources (1) and first memory zones (CA1, CA2, . . . , CAn) to store at least two different access control codes for controlling the hardware resources. The... |
| 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... |
| 6574338 |
Information delivery system and method |
| Jun-3-2003 |
A satellite-based digital broadcast system is used to provide real-time news, entertainment and informational programs to aircraft passengers in flight. Transmissions from the satellite occur on a time... |
| 6373947 |
Document processing |
| Apr-16-2002 |
There is provided a computer system including a first operating process operating in a non-modified operating environment and having at least one user operating command which is normally employed only... |
| 6345101 |
Cryptographic method and apparatus for data communication and storage |
| Feb-5-2002 |
The disclosed invention is a new cryptographic method which is fast and ideally suited for secure, high volume data communication and storage. The data is encrypted at the source using a private key and... |
| 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... |
| 6236727 |
Apparatus, method and computer program product for protecting copyright data within a computer system |
| May-22-2001 |
Apparatus, method and computer program product are provided for digitally processing an encrypted data stream scrambled, for example, according to content scrambling system (CSS) technology. This digital... |
| 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.... |
| 6178243 |
User-controlled document processing |
| Jan-23-2001 |
A system and method for selectable encryption of documents employing a document generator and a user-controlled document encryptor operative to encrypt user-selector portions of a document generated on... |
| 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... |
| 6148082 |
Scrambling and descrambling control word control in a remultiplexer for video bearing transport streams |
| Nov-14-2000 |
A method and system are provided for remultiplexing program bearing data. The remultiplexing method and system are applicable to MPEG-2 compliant transport streams carrying video programs. A descriptor... |
| 6144402 |
Internet transaction acceleration |
| Nov-7-2000 |
The invention is a multiple mode transmission system that interconnects the computer of a user with the Internet. The system has a first link that is a relatively low bandwidth telephone system. The system... |
| 6073235 |
Private broadcast communication system and method for private broadcast communication over a wired or wireless network |
| Jun-6-2000 |
A private broadcasting system includes communication terminals which are coupled to both a broadcasting network and point-to-point network. A private broadcasting device included in the broadcasting system... |
| 6069956 |
Method and apparatus for encrypting multiplexed data streams using key information continued in streams |
| May-30-2000 |
In a communication network in which data for transmission to a receiver terminal is multiplexed on a time-division basis and scrambled, a communication control apparatus and method for allowing the data... |
| 6067359 |
PN sequence generator with bidirectional shift register and Eulerian-graph feedback circuit |
| May-23-2000 |
A pseudorandom number sequence generator comprises a bidirectional shift register arranged to be loaded with a multi-bit sequence. The shift register is responsive to an ith clock pulse and an ith direction... |
| 6028933 |
Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network |
| Feb-22-2000 |
The specification relates to the encryption of data transmitted over a broadband multiple access bi-directional hybrid fiber/coax (HFC) network. The method supports downstream broadcast encryption from... |
| 6028934 |
TD multiplexing digital video signals with scramble of scrambling stages more than one greater in number than the video signals |
| Feb-22-2000 |
For supply to a time division multiplexer for multiplexing a predetermined number of digital multiplexer input signals bit by bit into a multiplexed signal in which a long pathological pattern is suppressed... |
| 6021197 |
Method and apparatus for controlling the operation of a signal decoder in a broadcasting system |
| Feb-1-2000 |
In a method and apparatus for controlling the operation of a signal decoder in a broadcasting system, a broadcast signal and an encrypted signature are generated and the signature is added to the signal.... |
| 5978479 |
Descrambler |
| Nov-2-1999 |
A descramble section extracts required information for descrambling transmitted together with TV signals and converts scrambled signals to ordinary TV signals in response to input control signals. A microcomputer... |
| 5966442 |
Real-time information delivery system for aircraft |
| Oct-12-1999 |
A satellite-based digital broadcast system is used to provide real-time news, entertainment and informational programs to aircraft passengers in flight. Transmissions from the satellite occur on a time... |
| 5937067 |
Apparatus and method for local encryption control of a global transport data stream |
| Aug-10-1999 |
An encryption control system to process an input transport data stream into an output transport data stream includes an input demultiplexer, a first secure microprocessor, a second secure microprocessor... |
| 5923755 |
Multi-service data receiver architecture |
| Jul-13-1999 |
A flexible architecture for a digital data receiver including a demultiplexer is provided which allows modular addition of data processors with low complexity and minimal memory requirements. The demultiplexer... |
| 5864621 |
Broadband television scrambling and descrambling system |
| Jan-26-1999 |
A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective... |
| 5835591 |
Demultiplexing device |
| Nov-10-1998 |
The object of the invention is a demultiplexing device. This device is characterized in that it comprises means for storing data of a multiplexed data stream (4), programmable means for storing data filters... |
| 5812665 |
Switched channel system |
| Sep-22-1998 |
A switching apparatus and method for routing RF scrambled signals. One of a plurality of scrambled RF television information signals is selected. A processor assigns an output carrier frequency. The selected... |
| 5774548 |
Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof |
| Jun-30-1998 |
An arrangement to automatically change between a scrambled digital data output and descrambled digital data output of a receiver by inserting a control signal conforming to a program provider's policy... |
| 5764773 |
Repeating device, decoder device and concealment broadcasting |
| Jun-9-1998 |
In a head end (3), which sends a satellite broadcasting signal received through a BS antenna to a connected cable, scrambled video and audio signals are separated by a separation part (11) from a satellite... |
| 5761307 |
Method for securing data in a telecommunications system |
| Jun-2-1998 |
A subscriber network is operated bidirectionally and has one or more coaxial line tree networks which are shared in each case by a plurality of subscriber-end network termination units and extend between... |
| 5754650 |
Simultaneous multichannel television access control system and method |
| May-19-1998 |
A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective... |
| 5742681 |
Process for the broadcasting of programmes with progressive conditional access and separation of the information flow and the corresponding receiver |
| Apr-21-1998 |
Process for the broadcasting of programmes with progressive conditional access and separation of the information flow, as well as the corresponding receiver, In order to form the elementary flow, groups... |
| 5721778 |
Digital signal transmitting method, digital signal receiving apparatus, and recording medium |
| Feb-24-1998 |
A digital signal transmitting method, a digital signal receiving apparatus, and a recording medium which ensure the security of fee-charged software information. When an image providing predetermined services... |
| 5699429 |
Packet TV program component detector |
| Dec-16-1997 |
Apparatus for selecting predetermined ones of packets of signal components, from a signal stream of packets includes a control device, responsive to user selection and a transmitted program guide, for... |
| 5682426 |
Subscriber site method and apparatus for decoding and selective interdiction of television channels |
| Oct-28-1997 |
An decryption system which facilitates simultaneous decryption of multiple encrypted television channel signals thus making them simultaneously available for direct tuning in television receivers. The... |
| 5631693 |
Method and apparatus for providing on demand services in a subscriber system |
| May-20-1997 |
An on demand services feature for the provision of video, audio, and data services for a subscription system of the CTV type, or the like. The system comprises a headend coupled to a distribution network... |
| 5627892 |
Data security scheme for point-to-point communication sessions |
| May-6-1997 |
Secure point-to-point communication of information to specific terminals is provided via a shared network. Far in advance of the establishment of an information session with a particular one of a plurality... |
| 5625693 |
Apparatus and method for authenticating transmitting applications in an interactive TV system |
| Apr-29-1997 |
An executable interactive program is combined with audio/video data for transmission. The program is divided into modules, similar to computer files, and a Directory Module is created which links program... |
| 5613003 |
Packet video signal inverse transport processor memory address circuitry |
| Mar-18-1997 |
In an inverse transport processor, program component packet payloads of respective program components are multiplexed to a memory data input port and directed to mutually exclusive areas of random access... |
