Abstract: A method for signalling, to a terminal, substitution of an item of content, broadcast via a broadcast network to which the terminal is connected, with a substitute item of content. Such a method includes: obtaining a substitute information packet including time information indicating a time of execution, by the terminal, of an action for substituting the broadcast item of content with the substitute item of content, wherein the time information corresponds to a date of rendering of an image of the broadcast item of content with reference to a reference clock embedded in the broadcast item of content; generating an event notification message including the time information; and inserting the event notification message into a data flow conveying the item of content broadcast within the broadcast network.

Abstract: A method for selecting a data stream for distribution to a plurality of broadcasting sites. The method includes: receiving a main data stream and a back-up data stream respectively, generated by a main broadcast gateway and a secondary broadcast gateway respectively, from source data, called a main stream and a secondary stream respectively; receiving at least one packet including a piece of information representative of a quality of service associated with the main stream and the secondary stream respectively, at one instant at least or over one given period at least, the at least one packet, called a main current packet and a secondary current packet respectively, being generated by the main broadcast gateway and secondary broadcast gateway respectively; and selecting in real time the main stream or the secondary stream respectively in taking account of the main current packet and secondary current packet, delivering the data stream for distribution.

Abstract: A method for generating an STL stream includes, in a local adapter serving a transmitter site in a broadcast network includes: receiving a first STL stream, generated by a broadcast gateway and having at least one frame including: a preamble packet, a timing packet, and at least one BB packet carrying at least one PLP; selecting at least one PLP carried by the BB packets, the BB packet(s) carrying the selected PLPs being called selected BB packet(s); generating an output STL stream including at least one frame having at least: a preamble packet, obtained from the preamble packet of the first STL stream, a timing packet, obtained from the timing packet of the first STL stream, and BB packets corresponding to the selected BB packets of the first STL stream. The frames of the first STL stream and the output STL stream have the same duration.

Abstract: A method for generating an original total stream intended for being distributed to at least one broadcasting site, which includes a modulator and a transmitter sending a radiofrequency signal on a first frequency. The method implements the following acts: obtaining at least one transport stream comprising at least one transport packet; obtaining, from at least one modulation parameter for the broadcasting site, at least one starting instant of a modulation frame intended for being sent by the broadcasting site; inserting at least one modulation information packet in the at least one transport stream, at a position determined from the at least one starting instant; and generating the original total stream, including at least one physical layer pipe encapsulating the at least one transport stream carrying the at least one modulation information packet.

Abstract: A method for processing an original total stream delivering a modified total stream, the original total stream being sent out by a head-end and addressed to a plurality of broadcasting sites, and including at least one physical layer pipe encapsulating a transport stream. The method includes receiving the original total stream, and for at least one physical layer pipe of the original total stream, called an original pipe: extracting the transport stream encapsulated in the original pipe, called an original transport stream; obtaining a modified transport stream by replacing at least one main content carried by the original transport stream by at least one secondary content; time-shifting the original total stream; aligning the modified transport stream with the original total stream obtained after time shift; and replacing, in the original pipe, the original transport stream by the modified transport stream.

Abstract: A method for synchronizing data, via a broadcast network, which includes at least one fixed transmitter and a plurality of broadcast sites. The synchronization method uses the following acts, at at least one of the broadcast sites: obtaining a delay, referred to as an absolute delay, determined from the geographic location of the broadcast site; determining an additional delay, by subtracting the absolute delay from a fixed delay shared by the broadcast sites in the network; resetting at least one time datum or at least one portion of a data stream from the fixed transmitter, applying the additional delay to the time datum or to the portion of the data stream.

Abstract: A method for broadcasting an alert service in a system for broadcasting digital audiovisual programs in a single-frequency network, wherein the method includes steps of: obtaining frames containing the alert service and other services; associating a mark for each frame; identifying the identifiers of the packets of audio and video components of the alert service and of other services; identifying the identifiers of packets of audio and video components of other services; receiving a command to broadcast an alert message; storing video and audio packets of the alert service as from the first frame mark following the reception of the alert message broadcast command; and replacing, from the second frame mark following the reception of the alert message broadcast command, all the packets of the video and audio components of the services other than the alert service with the packets of the alert service.

Abstract: A method for synchronizing data, via a broadcast network, which includes at least one fixed transmitter and a plurality of broadcast sites. The synchronization method uses the following acts, at at least one of the broadcast sites: obtaining a delay, referred to as an absolute delay, determined from the geographic location of the broadcast site; determining an additional delay, by subtracting the absolute delay from a fixed delay shared by the broadcast sites in the network; resetting at least one time datum or at least one portion of a data stream from the fixed transmitter, applying the additional delay to the time datum or to the portion of the data stream.

Abstract: A method replacing a main content by at least one secondary content, which implements steps including: determining an instant of video breaking and an instant of audio or subtitle breaking, based on at least one breaking packet; replacing in the original stream at least one video packet and audio packet or subtitle packet respectively of the main content by at least one video packet and audio packet or subtitle packet respectively of the secondary content starting from the video and the audio or subtitle breaking instant, respectively, and at least one audio packet or subtitle packet of the main content, delivering a modified stream; updating, in the modified stream of a reference clock, continuity counters of video packets and audio packets or subtitle packets respectively and at least one video reconstruction temporal information, and audio or subtitle reconstruction respectively in the replacement video packets, and audio or subtitle packets respectively.

Abstract: A method for generating a stream from first and second data streams received, the data streams comprising frames, each frame containing a synchronization packet, a signaling packet giving information on the structure of the data stream and packets referred to as baseband frames. The method comprises the steps of aligning the two data streams received by putting in phase the synchronization packets or the signaling packets of the frames of each data stream, identifying, in one of the data streams received, baseband packets identifying packets of a first type, and inserting, in each frame of the first stream received, baseband packets of the frame of the second stream the synchronization packet of which is aligned with the synchronization packet of the frame of the first stream.

Abstract: Housing for an electronic card includes a chassis that has a base, a cover, and an insertion wall. The base has a female element and a pocket. The electronic card can be introduced/extracted through a window of the insertion wall. The electronic card also includes guide walls, each including: a guide groove to receive the electronic card; a male element to cooperate with the female element; a tongue disposed at an end of the guide wall oriented on a side opposing the insertion wall and forming an arm having a stud to be inserted in the pocket; a clip disposed at the guide wall end and forming an elastic blade with a tooth oriented towards the base, and a face of the blade is oriented towards the cover and is designed to abut the latter; and a backplane electronic card to be inserted between the blade and the arm.

Abstract: A method for generating time marking for synchronous terrestrial broadcasting in at least one single-frequency zone of at least one audiovisual stream via at least one connection in which the at least one audiovisual stream is multiplexed with at least one other audiovisual stream broadcast via the at least one connection, the method including: inserting packets including at least one item of information representing a common reference clock, detecting at least one packet including information representing the number of days elapsed since a predetermined date, calculating the number of loopbacks of a counter during a given period, updating the counter at each packet of the audiovisual stream transmitted, inserting at least one packet including the value of the updated counter in the audiovisual stream in order to form a modified audiovisual stream and transmitting the modified audiovisual stream.

Abstract: A method for broadcasting an alert service in a system for broadcasting digital audiovisual programmes in a single-frequency network, wherein the method includes steps of: obtaining frames containing the alert service and other services; associating a mark for each frame; identifying the identifiers of the packets of audio and video components of the alert service and of other services; identifying the identifiers of packets of audio and video components of other services; receiving a command to broadcast an alert message; storing video and audio packets of the alert service as from the first frame mark following the reception of the alert message broadcast command; and replacing, from the second frame mark following the reception of the alert message broadcast command, all the packets of the video and audio components of the services other than the alert service with the packets of the alert service.

Abstract: The present invention concerns a method for generating a stream in accordance with the DVB standard that is understood by a first-generation decoder, typically in accordance with DVB-S/C/T/, and which also enables the deterministic generation of a stream in accordance with the second-generation DVB-T2 standard. A method is described for generating a stream containing a multiplex according to a first-generation DVB standard. This stream also contains the information relating to an encapsulation in accordance with DVB-T2 of at least one subset of broadcast programs inserted in the stream in the form of private sections that will be ignored by a first-generation decoder that will decode the stream in accordance with the first-generation standard. Equipment according to the invention can construct the T2-MI stream at a DVB-T2 transmitter deterministically, which can then be integrated in an SFN network.

Abstract: A method for generating time marking for synchronous terrestrial broadcasting in at least one single-frequency zone of at least one audiovisual stream via at least one connection in which the at least one audiovisual stream is multiplexed with at least one other audiovisual stream broadcast via the at least one connection, the method including: inserting packets including at least one item of information representing a common reference clock, detecting at least one packet including information representing the number of days elapsed since a predetermined date, calculating the number of loopbacks of a counter during a given period, updating the counter at each packet of the audiovisual stream transmitted, inserting at least one packet including the value of the updated counter in the audiovisual stream in order to form a modified audiovisual stream and transmitting the modified audiovisual stream.

Abstract: Housing for an electronic card includes a chassis that has a base, a cover, and an insertion wall. The base has a female element and a pocket. The electronic card can be introduced/extracted through a window of the insertion wall. The electronic card also includes guide walls, each including: a guide groove to receive the electronic card; a male element to cooperate with the female element; a tongue disposed at an end of the guide wall oriented on a side opposing the insertion wall and forming an arm having a stud to be inserted in the pocket; a clip disposed at the guide wall end and forming an elastic blade with a tooth oriented towards the base, and a face of the blade is oriented towards the cover and is designed to abut the latter; and a backplane electronic card to be inserted between the blade and the arm.

Abstract: In the field of the broadcasting of digital services intended for terminals retrieving these services, the concern is with the problem of synchronization in the context of a network transmitting on a single modulation frequency and the reliability of the broadcasting channel by redundancy of equipment. The present invention proposes a broadcasting system having a duplicated formatting module. This system enables a modulator to switch between the two streams generated by the two formatting modules without becoming desynchronized. These formatting modules are synchronized with each other in order to generate synchronized streams. Thus, when a modulator is caused to switch from a first stream generated by one of the formatting modules onto a second stream generated by a second formatting module, this switching can be effected without requiring a resynchronization step.

Abstract: Method of broadcasting a set of national and regional DVB-T2 programs not requiring duplicating the broadcasting of the national programs nor uploading the regional programs to a central point. This method is based on the creation of various T2-MI streams using PLP technology. A T2-MI stream is dedicated to the national programs. T2-MI streams are created for the regional programs. The national programs intended to be replaced by regional programs are isolated in specific pipes. The frame durations and the size of the box are harmonized between the various pipes. Each transmitter receives firstly the national T2-MI stream and at least one regional T2-MI stream. It has a device for replacing at least one pipe of the national T2-MI stream with a pipe of the regional T2-MI stream in order to generate the T2-MI stream to be transmitted.

Abstract: The present invention relates to the field of video stream transport. The invention specifically relates to a method for generating a clock signal controlling the transmission rate of an output signal device transmitting a stream from an input stream. The invention describes a method for generating the clock of the output stream from a measurement of the clock of the input stream. Said measurement is permanently adjusted in order to increase the accuracy of the measurement as well as to monitor possible drifts of the input stream clock. Said decorrelation between the clock of the input stream generates a regular output clock, even when the clock of the input stream is irregular.

Abstract: A device is positioned upstream of a modulator in a digital service stream broadcasting chain, and is adapted to receive a plurality of transport streams and to transmit a transport stream to a modulator, each transport stream encapsulating a digital service stream adapted to be broadcast by the modulator, the digital service streams representing the same digital service. The device is also adapted to: digital service streams from the received transport streams; detect errors in the streams; align the extracted streams; select a stream from the aligned streams, according to any errors detected; encapsulate the selected stream, in order to form the stream to be transmitted to the modulator.