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: The invention relates to a method for sending control data in a hybrid wireless/broadcast network system, said network system comprising a broadcast network dedicated to transmission of broadcast services through at least a broadcast cell and a wireless network dedicated to transmission of at least a service through a plurality of cells, a cover area of the broadcast cell covering, at least partially, a cover area of a first cell and a cover area of a second cell among the plurality of cells, said method comprising: when control data related to a service of the first cell is identical to control data related to a service of a second cell, sending the control data through the broadcast cell.

Abstract: A method for encoding a data stream representing an omnidirectional video. The method includes: encoding, in the stream, at least one base layer representative of a 2D or 3D video, the 2D or 3D video being representative of a view of a same scene captured by the omnidirectional video; and encoding, in the stream, one enhancement layer representative of the omnidirectional video. The enhancement layer is encoded by prediction relative to the base layer. The prediction of the enhancement layer relative to the base layer includes: generating a reference sub-image obtained by geometrical projection on the reference sub-image of an image, called a base image, rebuilt from the base layer, and storing the reference sub-image in association with shift information enabling an encoder to determine the location of the reference sub-image in the enhancement image in a non-transitory computer-readable memory of reference sub-images of the enhancement layer.

Abstract: The invention relates to a method for transmitting redundancy data in an hybrid broadband/broadcast network system comprising a broadcast network dedicated to transmission of broadcast services and a broadband network dedicated to transmission of at least unicast services, the method being carried out in at least one network entity and comprising the following steps: —selecting (42) a transmission mode for transmitting redundancy data among a plurality of transmission modes supported by the broadband network; —obtaining (43) redundancy data, said redundancy data comprising information for decoding broadcast services broadcasted by the broadcast network; —transmitting (44), via at least one node of the broadband network, the obtained redundancy data according to the selected transmission mode.

Abstract: A method for synchronizing a first data stream and a second data stream, at least one stream among the first stream and second stream being received by radiofrequency broadcasting and the other stream being received via an IP network, the first and second streams carrying the same service. The method involves receiving a value of the mean offset between the first stream and the second stream; storing the first stream in a first buffer and storing the second stream in a second buffer; extracting a first extract from the first buffer and a second extract from the second buffer, according to the mean offset value received; comparatively analyzing the first extract and the second extract in order to deduce a value of the actual offset between the first stream and the second stream; synchronizing the first stream and second stream according to the actual offset value obtained.

Abstract: A method of transmitting an audio and/or audiovisual content to a receiver. The method starts with receiving a determined stream broadcast on a network and playing back the contents transmitted by the stream in the receiver. Then a first event external to the receiver is detected and triggers interruption of the playback of the content in progress and recording of the instant of the interruption. Sometime later, a second external event triggers a transmission, from the receiver to a remote server, of the instant dating the first event and of a request for resuming the playback of the interrupted content. A piece of information specifying the identifiers of the data packets of the content at the instant of the interruption is then transmitted from the remote server to the receiver. Finally, the receiver receives the identified data packets and replays the content of the packets.

Abstract: A method of encoding and a device for encoding a data stream representative of an omnidirectional video and, correlatively, a method for decoding and a device for decoding a data stream representative of an omnidirectional video. The data stream is representative of an omnidirectional video and includes encoded data of at least one base layer representative of a 2D or 3D video representative of a view of a scene captured by the omnidirectional video, and encoded data of at least one enhancement layer representative of the omnidirectional video. The least one enhancement layer is encoded by prediction relative to the at least one base layer.

Abstract: The invention concerns an antenna, comprising at least two non-ferrous metal plates, at least one first plate forming a radiating portion and a second plate forming a mass plane, at least one substrate, arranged between the mass plane and the radiating portion, and an excitor of length at least equal to the thickness of the substrate, extending between the mass plane and the radiating portion and connected to the radiating portion, and adapted to supply the antenna, characterised in that the substrate is a dispersive ferromagnetic substrate, called dispersive ferrite presenting, as magnetic features, a high relative magnetic permeability comprised between 10 and 10,000 and a high magnetic loss tangent greater than 0.1, said antenna comprising means for gradually and locally reducing magnetic features of the dispersive ferrite.

Abstract: A method and a device for generating a radar signal are provided. The method includes a step of acquiring a communication signal comprising frames assigned to communication and frames not assigned to communication, and a step of inserting a radar pulse into at least one non-assigned frame of the communication signal, called radar frame, in order to form said radar signal.

Abstract: The invention relates to an antenna structure for transmitting and/or receiving wavelengths of metric frequency or decimetric frequency, characterised in that it comprises n collinear antennas, each antenna comprising a radiating portion comprising a first succession of i coaxial radiating elements about a first axis alternating with at least an additional succession of i radiating elements about another axis, each antenna being independently powered by a coaxial cable, each antenna comprising at least one lower quarter-wave trap and at least one upper quarter-wave trap, at least a first antenna comprising at least one hollow core being configured to receive a coaxial cable intended for powering of another antenna collinear with the first antenna, at least one intermediate quarter-wave trap being arranged between two consecutive collinear antennas around a coaxial cable, and a terminal element.

Abstract: The disclosure relates to a ferrite antenna comprising at least one main contour, comprising at least one first winding referred to as main winding, at least one first ferromagnetic rod referred to as main ferromagnetic rod and a tuning system, each main winding being wound around a main ferromagnetic rod and connected to the tuning system comprising a capacitor connected in parallel with the main winding. The ferrite antenna further comprises a non-resonant secondary contour, comprising a secondary winding separated electrically from each main winding and a secondary ferromagnetic rod around which the secondary winding is wound, and each main ferromagnetic rod and the secondary ferromagnetic rod are arranged parallel to one another so as to make it possible for a magnetic coupling of each main winding with the secondary winding.

Abstract: The invention relates to an antenna designed to emit and/or receive surface waves with a decametric, hectometric or kilometric central wavelength ?0, characterised in that it comprises at least one horizontal wire aerial element of between 0.5?0 and ?0 in length, and at least three vertical wire aerial elements of the same length between 0.03?0 and 0.1?0, arranged in a same plane and each comprising an upper end and a lower end, said upper ends being connected to the horizontal wire aerial element, said lower ends being designed to be connected to a conducting medium having a substantially horizontal surface. The invention also relates to an antenna, an antenna array and a use of an antenna or of an antenna array.

Abstract: The invention concerns an antenna, comprising at least two non-ferrous metal plates, at least one first plate forming a radiating portion and a second plate forming a mass plane, at least one substrate, arranged between the mass plane and the radiating portion, and an excitor of length at least equal to the thickness of the substrate, extending between the mass plane and the radiating portion and connected to the radiating portion, and adapted to supply the antenna, characterised in that the substrate is a dispersive ferromagnetic substrate, called dispersive ferrite presenting, as magnetic features, a high relative magnetic permeability comprised between 10 and 10,000 and a high magnetic loss tangent greater than 0.1, said antenna comprising means for gradually and locally reducing magnetic features of the dispersive ferrite.

Abstract: The invention relates to an antenna structure for transmitting and/or receiving wavelengths of metric frequency or decimetric frequency, characterised in that it comprises n collinear antennas, each antenna comprising a radiating portion comprising a first succession of i coaxial radiating elements about a first axis alternating with at least an additional succession of i radiating elements about another axis, each antenna being independently powered by a coaxial cable, each antenna comprising at least one lower quarter-wave trap and at least one upper quarter-wave trap, at least a first antenna comprising at least one hollow core being configured to receive a coaxial cable intended for powering of another antenna collinear with the first antenna, at least one intermediate quarter-wave trap being arranged between two consecutive collinear antennas around a coaxial cable, and a terminal element.

Abstract: The invention relates to a surface wave antenna system, comprising at least one antenna that is electrically short in the vertical plane, with vertical or elliptic polarization and emitting a radiation, said antenna being linked to a conducting medium exhibiting a substantially horizontal surface. The antenna system being characterized in that it comprises furthermore at least one parasitic wire extending in a direction substantially parallel to the surface of the conducting medium, electrically insulated from each antenna, and arranged in the vicinity of at least one antenna in such a way as to be able to radiate by virtue of the current induced by said radiation of this antenna. The invention makes it possible to combine the resultants of each radiating element in such a way as to control the radiation pattern in the vertical plane.

Abstract: Disclosed is a method for accessing a broadcast service by a user equipment, the user equipment accessing a mobile network providing services carried on at least a first frequency carrier: —detecting at least one system information block within a downlink signal issued by the mobile network on the first frequency carrier, the system information block including cross-carrier signaling information indicating a resource location corresponding to a broadcast service provided by a non-unicast network on a second frequency carrier being disjoint from the first frequency carrier; —obtaining on-carrier signaling information related to at least a first broadcast service provided by the non-unicast network on the second frequency carrier, based on the resource location indicated in the system information block; and —accessing the first broadcast service based on the on-carrier signaling information.

Abstract: The disclosure relates to a ferrite antenna comprising at least one main contour, comprising at least one first winding referred to as main winding, at least one first ferromagnetic rod referred to as main ferromagnetic rod and a tuning system, each main winding being wound around a main ferromagnetic rod and connected to the tuning system comprising a capacitor connected in parallel with the main winding. The ferrite antenna further comprises a non-resonant secondary contour, comprising a secondary winding separated electrically from each main winding and a secondary ferromagnetic rod around which the secondary winding is wound, and each main ferromagnetic rod and the secondary ferromagnetic rod are arranged parallel to one another so as to make it possible for a magnetic coupling of each main winding with the secondary winding.

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: The invention relates to an antenna designed to emit and/or receive surface waves with a decametric, hectometric or kilometric central wavelength ?0, characterised in that it comprises at least one horizontal wire aerial element of between 0.5?0 and ?0 in length, and at least three vertical wire aerial elements of the same length between 0.03?0 and 0.1?0, arranged in a same plane and each comprising an upper end and a lower end, said upper ends being connected to the horizontal wire aerial element, said lower ends being designed to be connected to a conducting medium having a substantially horizontal surface. The invention also relates to an antenna, an antenna array and a use of an antenna or of an antenna array.

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.