摘要:
Method for the cross-modulation of DVB-S or DVB-C signals to DVB-T signals by PID filtering, the signals being organized in transport streams of bits organized in packets, each one of which has a packet PID, which comprises demodulating, in a demodulator (1), a DVB-S or DVB-C signal, to obtain an initial transport stream TSx composed of elements or packets of bytes, from whose steams must be eliminated PES ("Packetized Elementary Stream") packets to adapt the transport rate. For all the packets of the initial transport stream TSx, the following phases are performed in a PID filter (2): read the PID identifier of each packet of the initial transport stream; if the PID identifier corresponds to a PID of a PES which must be eliminated, filter the PID marking this as NULL packet, with the marker reserved for the NULL packet, without modifying the program clock reference of the packets or the PSI tables, generating a filtered transport stream TSy.
摘要:
It is provided a method for transmitting data to user equipments, a communication system, a base station and a mobile station. Data is transmitted to user equipments (3) from a first base station (BBS) and from second base stations (CBS) in a time division multiplexed manner in frames (F). Each frame (F) has a first sub-frame (20) and a second sub-frame (21). The user equipments (3) are located in cells (2), each cell (2) comprising a second base station (CBS). Data is transmitted wirelessly, during a first sub-frame of a frame, data from the first base station (BBS) to user equipments (3) in a plurality of cells (3). Data is transmitted wirelessly, during the second sub-frame (21) of the frame (F), from second base station (CBS) to at least one the plurality of user equipments (3). The data being transmitted from the first base station (BBS) is also transmitted by the second base station (CBS) to at least one of the plurality of cells (3).
摘要:
A broadcasting system which permits broadcast of high dignity by rationalized equipment is provided. In this broadcasting station, the N-th affiliated station SatN forwards program material data (24a), CM material data (25a) and organization information data (26a) to a central station Cbs via an ATM/LAN (50), and registration means (1) registers and stores such data into a program bank (4), a CM bank (5) and a data server (2). Automatic sending control means (9) and automatic sending means (10) for the N-th affiliated station take out materials from the program bank (4), the CM bank (5) or a CM bank (6) for different J-th affiliated station, etc. under real time management of time management means (15) on the basis of organization information registered and stored in the data server (2) to organize televising contents Oacn to send out the televising contents to the N-th affiliated station SatN via a dedicated digital line (51). Thus, the N-th affiliated station Sat N carries out broadcast of high dignity from transmitting means (22) in the state where reorganization and processing of televising contents Oacn are not carried out, and cut and/or residual of unnecessary portion of televising contents taking place resulting from deviation in timing are excluded.
摘要:
A method is described for the transmission and reception of radiotelevision signals of the terrestrial digital broadcasting type, said radiotelevision signals comprising a plurality of radiotelevision programs or services receivable by a receiver in a certain frequency band, wherein at least a portion of said frequency band has been discontinued for the radiotelevision signals of the terrestrial digital broadcasting type and assigned to a different service, in particular to a mobile telephony service, such as the LTE type, wherein it is provided to transmit satellite type radiotelevision signals containing said receivable radiotelevision programs or services from which radiotelevision signals of the terrestrial digital broadcasting type are derived that are placed in channels belonging to said portion of said frequency band, said radiotelevision signals of the terrestrial digital broadcasting type not being irradiated, but conveyed via cable to said receiver.
摘要:
Disclosed is an apparatus and method for adding transmitter identification information. The transmitter identification information adding apparatus enables a wireless relay station within a DAB(Digital Audio Broadcasting) series transmission system to add, in a signal received from a transmitting station, separate transmitter identification information, so that a receiving station may identify whether the received signal is a signal transmitted from the wireless relay station, or a signal transmitted from the transmitting station, based on identification information.
摘要:
A digital radio device (10) for emitting a radio signal in digital format comprising a transmitter stage (14) able to emit a radio signal in digital format, a transceiver module (12) for radio access to a wireless data network (NT) connected to the transmitter stage, means (MP) for extracting a data stream from the wireless network and sending it to the transmitter stage so that it can be radio broadcast locally.