Abstract: The method and system for TV user profile data prediction and modeling allows accurate and narrowly focused behavioral clustering. A client-side system classifies television consumers into representative user profiles. The profiles target individual user advertising and program preference category groups. A contextual behavioral profiling system determines the user's monitor behavior and content preferences, and the system may be continually updated with user information. A behavioral model database is queried by various system modules. The programming, including targeted advertising for television and interactive television is based on the profile data prediction, modeling and preference determination. The system is enabled to present a complete program sequence to the viewer based on the preference determination and stored programming.

Abstract: To enable dynamic configuration of an electronic system (10) having a first electronic module (141) and at least one second electronic module (161) for providing input and output connections to the first module, the second electronic module carries a memory (38) containing configuration information. A controller (36) on the first electronic module can query the memory (38) on an interconnected second electronic module to obtain the configuration information for that module. Using the configuration information obtained from the second electronic module, the first electronic module can configure its self accordingly. In this way, the first electronic module can configure itself without any a priori information about the second electronic module.

Abstract: A method of managing auxiliary programs broadcast with main programs in a digital data stream, wherein the method is implemented by a receiver, involving receiving several digital data streams including the aforementioned digital data stream, detecting data identifying all the auxiliary programs contained in said digital data stream, extracting all the auxiliary programs identified in the stream, and storing all of the auxiliary programs identified and extracted from the digital data stream, wherein the extraction is followed by analyzing execution commands associated with the extracted auxiliary programs.

Abstract: A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting said at least two encrypted values with said data.

Abstract: A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting said at least two encrypted values with said data.

Abstract: A method of authentication of data to be sent in a digital transmission system, the data being organized in a series of at least three files, involving generating a first authentication value for at least one first file, storing said first authentication value in a second file, generating a second authentication value for said second file, storing said second authentication value in a third file, and transmitting said first, second, and third files to a receiver.

Abstract: A method for transmission and storing of scrambled content in which the scrambled content is transmitted together with encrypted control words, the control words being used for descrambling the scrambled content, transmitting to a receiver/decoder the scrambled content and encrypted control words, said control words being encrypted by an exploitation key (KG), decrypting said encrypted control words in a removable security module with an exploitation key (KG), said removable security module being received by the receiver/decoder, characterised in that it further includes transmitting usage rules message (URM) to the receiver/decoder (2000), which usage rules (URM) impose usage constraints on the playback of the content stored on a mass storage device encrypting the decrypted encrypted control words and usage rules messages by a local key (KL) to produce encrypted control management messages (CMM) storing said scrambled content and encrypted control management message on the mass storage device of the receiver

Abstract: A display control unit that is used to display a current portion of a document on a screen when an interactive or scrollable page of said document requires a larger display area than that of the screen. The display control unit includes a unit which is connected to a remote server configured to deliver interactive documents including principal and secondary documents. The display control unit also includes a display unit used to control the display of a current portion of the scrollable interactive page on the screen, and a memory control unit including a priority level allocation unit configured to assign a priority level to each secondary document of the scrollable interactive page and a memory control unit used to control the storage of secondary documents with the highest priority levels in the memory.

Abstract: A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting said at least two encrypted values with said data.

Abstract: A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting said at least two encrypted values with said data.

Abstract: The invention concerns a method for displaying a document on a display screen capable of being subjected to a scroll procedure, involving the following steps: providing the document with an amount of graphic memory to create a buffer memory of the visible part of the document and zones nearest to said visible part; calculating and cutting out into pixmaps said memory; relatively positioning said pixmaps with respect to the entire document and its visible part; filling up the content of the pixmaps, when the document is subjected to a display or scroll procedure, recopying the pixmap content in the display window; and repeating the relative positioning of the pixmaps with respect to the document.

Abstract: A method of authentification of data sent in a digital transmission characterized by the organization and authentification of the data prior to transmission into a hierarchy of at least one root directory unit (75), subdirectory unit (76) and file unit (77), data in a file (77) being acted upon by an authentification algorithm and an associated file authentification value (82) stored in the referring subdirectory unit (77), this file authentification value (82) being in turn acted upon by an authentification algorithm and an associated subdirectory authentification value (79) stored in the referring root directory. Other aspects of the invention relate to the authentification of a second root directory (78) by generation of a second authentification value (83) and the authentification of data before encapsulation in tables or sections of a transport stream.

Abstract: The present invention provides a digital television system where access rights to a programme or channel are received analyzed by the decoder in determining whether to permit or prohibit full audio and visual access by the user to that programme or channel when displayed in respective windows of a mosaic formation.

Abstract: A chat system for a digital television network comprises a digital operator head end system for broadcasting to subscriber decoders. The head end system comprises a chat room creation device which communicates with a chat server to create, cancel and/or join an event related chat room, a trigger device which may be programmed to activate itself at the occurrence of an event and automatically sends a request for creation of a chat room to the chat room creation device, a broadcast device used for preparing a transmission of information to the subscriber decoders, and a notification server to generate a notification message to be transmitted by the broadcast device, the notification message being related to the creation of an event related chat room.

Abstract: A method of transmission of digital information in a digital communication network, the network comprising at least one transport stream carrying one or more bouquet related tables such as BAT tables (53, 54) containing information regarding the services provided in a commercial bouquet and characterised in transmitting at least one table (51) comprising a list of bouquet identity values of some or all of the bouquet association tables together with an indication of the or each transport stream carrying that table or tables. In a particularly preferred embodiment, the table (51) containing a list of bouquet identity values may correspond to the Network Information Table of a network. The present invention also extends to the identification of any fixed PID, TID tables that may only be distinguished by their TID extension values. The present invention is particularly applicable to digital television systems conforming to the MPEG-2 and DVB proposed standards.

Abstract: The invention relates to a method for reception of a data stream, transmitted in segment in one or several broadcast channels, comprising a reception step for the data in a segment of data stream transmitted by an active broadcast channel. A step for changing reception channel allows switching from the current broadcast channel to a second channel after receipt of the data stream. A listening step on said second channel listens for an event identifying the transmission of the subsequent segment of the data stream and a step for changing reception channel by switching from said second channel to the current broadcast channel or another broadcast channel.

Abstract: The invention relates to a method for processing a complex request addressed to at least one SNMP agent (5) of a resource machine (2b) from an SNMP manager (4) of an application machine (2a). The complex request is processed so as to enable an integrating agent (6) to translate the complex request into SNMP requests and to optimize the number of SNMP requests transmitted through the network (3), particularly the number of GETNEXT requests.

Abstract: A method for selecting advertisement in a Set Top Box (STB) of a television network comprises receiving advertisement selection information for one or a plurality of advertisement associations. Each advertisement association associates an advertisement space with an advertisement. The advertisement selection information corresponds for each advertisement association to a value of probability for selecting the advertisement for the advertisement space. A selection of an advertisement for a determined advertisement space is triggered and a random value or a pseudo-random value generated. An advertisement is selected using the random value or the pseudo-random value, by selecting a determined advertisement association that associates an advertisement with the determined advertisement space and for which the corresponding advertisement selection information has a value of probability that relates to the random value or the pseudo-random value.

Abstract: The invention concerns a method and system for performing a trick mode in response to a trick mode command. The method 200 can include the steps of modifying a field display order indicator of at least one intra picture having at least a first field and a second field in a video signal containing intra pictures to enable the second field of the at least one intra picture to be displayed before the first field of the at least one intra picture and decoding the at least one modified intra picture. In one arrangement, the decoding step can be performed with a remote decoder, and the video signal can include non-intra pictures.

Abstract: A system for transmitting and recording digital data is included. Further, a system for transmitting transmit scrambled audio data that is to be recorded on a mini disc reader is included. A system for transmission and recording of digital data includes transmission means adapted to prepare and transmit scrambled digital data together with at least one encrypted control word and a digital recording device adapted to receive and record the scrambled digital data and encrypted control word on a digital support. The digital recording device further includes an access control means adapted to decrypt the control word and thereafter descramble the digital data during playback.