Enensys Technologies

France

Enensys Technologies

France
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The invention relates to a method for synchronizing data, via a broadcast network comprising at least one fixed transmitter and a plurality of broadcast sites. According to the invention, such a synchronization method uses the following steps, at at least one of the broadcast sites: - obtaining (31) a delay, referred to as absolute delay, determined from the geographic location of said broadcast site; - determining (32) an additional delay, by subtracting said absolute delay from a fixed delay shared by said broadcast sites in said network; - resetting (33) at least one time datum or at least one portion of a data stream from said fixed transmitter, applying said additional delay to said time datum or to said portion of said data stream.


Patent
Enensys Technologies | Date: 2015-07-30

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.


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.


Patent
Enensys Technologies | Date: 2017-06-07

The present invention concerns a method for broadcasting an alert service in a system for broadcasting audiovisual digital programmes in a single-frequency network. The method comprises the steps, carried out by a module for inserting the alert service, of: - obtaining (E301, E301, E302) transmission frames comprising the alert service and other services, - associating (E303) a marker with each transmission frame, - identifying (E303, E305) the identifiers of the packets of audio and video components of the alert service and of the packets of audio and video components of the other services, - receiving a command to broadcast an alert message, - storing the video and audio packets of the alert service from the first transmission frame marker following receipt of the command to broadcast an alert message, - replacing, from the second transmission frame marker following receipt of the command to broadcast an alert message, all of the packets of the video and audio components of the services other than the alert service with the packets of the alert service stored in the backup memory and replacing the identifiers of packets of audio and video components of the alert service respectively with the identifiers of packets of the audio or video component of the replaced packet in order to form a new transmission frame.


Patent
Enensys Technologies | Date: 2014-11-28

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.


Patent
Enensys Technologies and Tdf | Date: 2014-12-17

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.


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.


Patent
Enensys Technologies | Date: 2012-07-11

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 programmes 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.


Patent
Enensys Technologies | Date: 2013-12-12

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.


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.

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