Abstract: The invention relates to a process for transmitting and a process for receiving update data. According to the invention, the update data are dispatched by a communication center to terminals with the aid of a broadcasting network. Next, the terminals report their update to the center through a bidirectional network. The center renews the campaign or stops the current campaign as a function of the number of terminals updated. When only a minimum number of terminals to be updated remains, the campaign is stopped, the last terminals not updated will be so via the bidirectional link. The invention also relates to the center implementing a dispatch process and the receiver for receiving and processing the update data.

Abstract: The present invention relates in particular to a synchronization system and method. The synchronization system comprises a specification unit for specifying synchronization signals associated with an audiovisual program, the latter comprising an audiovisual content and control information, a recognition unit for recognizing the synchronization signals in a transmitted stream carrying this program, by recognition of at least one extracted portion of the audiovisual content, and an activation unit triggering an action in case of detection of these signals. The specification unit prepares and transmits to the recognition unit recognition elements making it possible to obtain this extracted portion, as well as at least one action timeout lag in case of detection of the synchronization signals. The recognition or activation unit then delays the triggering of this action according to the lag transmitted, in case of detection of the synchronization signals.

Abstract: The present invention relates in particular to a synchronization system and process. The synchronization system comprises a specification unit for specifying synchronization signals associated with an audiovisual program, the latter comprising an audiovisual content and control information, a recognition unit for recognizing these synchronization signals in a stream carrying this program transmitted via a broadcasting network, by recognizing at least one extracted portion of the audiovisual content, and an activation unit triggering an action in case of detection of these signals. The specification unit prepares and transmits to the recognition unit recognition elements making it possible to obtain this extracted portion, which comprise instructions for extracting the portion of content from at least one stream of an audiovisual program previously received by the recognition unit via the broadcasting network. In variants, the recognition elements are obtained independently of the specification unit.

Abstract: Update data is dispatched by a communication center to terminals with the aid of a broadcasting network. Next, the terminals report their update to the center through a bidirectional network. The center renews a current campaign or stops the campaign as a function of the number of terminals updated. When only a minimum number of terminals need to be updated, the campaign is stopped and the last terminals that were not updated through the campaign transmitted through broadcast network will be updated via the bidirectional link.

Abstract: Update data is dispatched by a communication center to terminals with the aid of a broadcasting network. Next, the terminals report their update to the center through a bidirectional network. The center renews a current campaign or stops the campaign as a function of the number of terminals updated. When only a minimum number of terminals need to be updated, the campaign is stopped and the last terminals that were not updated through the campaign transmitted through broadcast network will be updated via the bidirectional link.

Abstract: The invention concerns a method for transmitting binary data in a video transmission system. The method comprises the steps of providing ATVEF announcements on a first predefined IP multicast address; providing ATVEF trigger and/or content transmission on a first range of IP multicast addresses; providing non-ATVEF announcements on a second predefined multicast address different from said first address; and providing non-ATVEF data transmission on a second range of IP multicast addresses, exclusive of the first range. The invention also concerns an emitter and a receiver for implementing the method.

Abstract: The present invention concerns a device and a process for signing digital streams, each of them comprising contents, related to audiovisual information, and a signaling. The device applies encrypting to selectively determined descriptors of the signaling, called authenticated descriptors, to obtain signature. The invention also concerns corresponding authentication device and process. Application to authentication of DVB/MPEG digital streams, notably for MHP.

Abstract: The present invention relates to a conditional decision device and method for the execution of services received, having predetermined life spans. This device receives and identifies information relating to computer programs required for the execution of these services. It checks the local availability of these programs and allows the services to be executed if the associated programs are available locally. Furthermore, it is capable of triggering a downloading of the programs when the latter are not available locally, and allowing or preventing such a download, at least according to information associated with the services. The invention also relates to a device and a method for compiling associated messages. Application to ATVEF and MHP standards.

Abstract: The present invention relates in particular to a synchronization system and method. The synchronization system comprises a specification unit for specifying synchronization signals associated with an audiovisual programme, the latter comprising an audiovisual content and control information, a recognition unit for recognizing the synchronization signals in a transmitted stream carrying this programme, by recognition of at least one extracted portion of the audiovisual content, and an activation unit triggering an action in case of detection of these signals. The specification unit prepares and transmits to the recognition unit recognition elements making it possible to obtain this extracted portion, as well as at least one action timeout lag in case of detection of the synchronization signals. The recognition or activation unit then delays the triggering of this action according to the lag transmitted, in case of detection of the synchronization signals.

Abstract: The present invention concerns a device and a process for signing digital streams, each of them comprising contents, related to audiovisual information, and a signaling. The device applies encrypting to selectively determined descriptors of the signaling, called authenticated descriptors, to obtain signature. The invention also concerns corresponding authentication device and process. Application to authentication of DVB/MPEG digital streams, notably for MHP.

Abstract: The present invention relates in particular to a synchronization system and process. The synchronization system comprises a specification unit for specifying synchronization signals associated with an audiovisual programme, the latter comprising an audiovisual content and control information, a recognition unit for recognizing these synchronization signals in a stream carrying this programme transmitted via a broadcasting network, by recognizing at least one extracted portion of the audiovisual content, and an activation unit triggering an action in case of detection of these signals. The specification unit prepares and transmits to the recognition unit recognition elements making it possible to obtain this extracted portion, which comprise instructions for extracting the portion of content from at least one stream of an audiovisual programme previously received by the recognition unit via the broadcasting network. In variants, the recognition elements are obtained independently of the specification unit.

Abstract: The present invention relates to a process for synchronizing the transmission of programs to users and the incorporation of transmission contents into said programs. It also applies to corresponding devices and products. According to the synchronizing process, programs enhanced with the contents are produced by sending command instructions to a transmission device and to a transmission server in a time-organized manner, and by incorporating forthwith the contents produced by the server into the programs produced by the device. Instructions relating to processings of data and which are incomprehensible to this server are in particular submitted to the latter, which routes them immediately to a service operator. The latter immediately executes the commands emanating from these instructions. The transmission of the programs is thus synchronized with the operations relating to the data processings.

Abstract: The interactive multimedia devices is based on network structures involving: a broadcasting network (120) and a return path network (140). On the broadcasting network, the interactive data are multiplexed with the broadcast audiovisual signals so as to offer interactivity to connected end-users on the return path network. To address specific sociological profiles, and to save bandwidth, a plurality of filters, let's say a number N, is associated with a single interactive application. In such case, the comparison continues until one of the N filters match the profile stored in the terminal permanent memory. If one of the filters matches the viewer's profile, the interactive application is executed, else the application is ignored. In this way, a plurality of categories of viewers can interact. A plurality of filters can be associated with an interactive application with different contents. To each filter corresponds a content.

Abstract: The present invention relates to a security device (3) and process for protecting messages (MSG) despatched to a receiver (2) comprising means of control of identification (21) by a modifiable current identification key (K′i). It also relates to a corresponding device (4) and a corresponding process for identifying messages. The security device comprises a unit for control of enciphering (11) of at least a part of each of these messages by means of a modifiable current enciphering key (Ki), in such a way as to produce a signature added to the message. It also comprises a unit (12) for changing the current enciphering key, selecting this key from a predetermined set (16) of available enciphering keys (K1 Kn), as well as a unit (13) for registering a key identifier (KeyID) in this message.

Abstract: The invention concerns a method for transmitting binary data in a video transmission system. The method comprises the steps of providing ATVEF announcements on a first predefined IP multicast address; providing ATVEF trigger and/or content transmission on a first range of IP multicast addresses; providing non-ATVEF announcements on a second predefined multicast address different from said first address; and providing non-ATVEF data transmission on a second range of IP multicast addresses, exclusive of the first range. The invention also concerns an emitter and a receiver for implementing the method.

Abstract: The invention relates to a method of establishing a connection between an receiver device and an interactive services server, characterized in that it comprises the steps, at the level of the said receiver device of:

Abstract: The invention relates to a process for transmitting and a process for receiving update data. According to the invention, the update data are dispatched by a communication center to terminals with the aid of a broadcasting network. Next, the terminals report their update to the center through a bidirectional network. The center renews the campaign or stops the current campaign as a function of the number of terminals updated. When only a minimum number of terminals to be updated remains, the campaign is stopped, the last terminals not updated will be so via the bidirectional link.

Abstract: The present invention relates to a device and to a process for transmitting control instructions for access to functionalities of receivers (2), as well as to a corresponding device and process for implementing control instructions.