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 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 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 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 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: 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: 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: A contribution system where the national services are not duplicated in the single stream. This single stream is transmitted in a mode not implementing burst transmission. Advantageously, the single stream is not protected by an FEC error correcting code, as present in the radio broadcast standard, for example DVB-H. Synchronization is provided by the insertion by the concentrator of synchronization packets comprising three synchronization stamps. A first stamp serves to synchronize the deconcentrators with each other and with the concentrator. A second stamp generates a first synchronization signal allowing synchronous generation of the period of the burst transmission mode necessary for generating the regional signal. The third stamp serves to generate a second synchronization signal for generating so-called “MIP” synchronization packets for synchronizing the various modulators.

Abstract: The invention concerns multi-carrier based digital telecommunication systems where the channel is used to transport several data streams according to the frequency division multiple access scheme. The proposed method concerns a mapping of data on physical resource in a transmission system where data of elementary streams is distributed over several physical resource blocks, and within each resource block in order to get data from a plurality of elementary streams on at least one sub-carrier and at least a symbol time of each physical resource block. This allows to achieve a good diversity of the allocation of the different streams, leading to the advantage, among others, that poor transmission conditions affecting a particular sub-carrier or a particular time duration, will not concentrate its effects on a particular stream.

Abstract: A contribution system where the national services are not duplicated in the single stream. This single stream is transmitted in a mode not implementing burst transmission. Advantageously, the single stream is not protected by an FEC error correcting code, as present in the radio broadcast standard, for example DVB-H. Synchronisation is provided by the insertion by the concentrator of synchronisation packets comprising three synchronisation stamps. A first stamp serves to synchronise the deconcentrators with each other and with the concentrator. A second stamp generates a first synchronisation signal allowing synchronous generation of the period of the burst transmission mode necessary for generating the regional signal. The third stamp serves to generate a second synchronisation signal for generating so-called “MIP” synchronisation packets for synchronising the various modulators.

Abstract: The invention concerns multi-carrier based digital telecommunication systems where the channel is used to transport several data streams according to the frequency division multiple access scheme. The proposed method concerns a mapping of data on physical resource in a transmission system where data of elementary streams is distributed over several physical resource blocks, and within each resource block in order to get data from a plurality of elementary streams on at least one sub-carrier and at least a symbol time of each physical resource block. This allows to achieve a good diversity of the allocation of the different streams, leading to the advantage, among others, that poor transmission conditions affecting a particular sub-carrier or a particular time duration, will not concentrate its effects on a particular stream.