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Video Head Set
the following order: Viterbi decoding of the thread code, Video Head Set DeInterleaving, reed Solomon, that decode and derandomizing energy spreading; the original data are 188 byte transportation packages, those generally parallel to form supply themselves (8 bit data, master clocks and control signals, of, shows which generally uncorrectable disturbances) on. The BlockierenADC three, QPSK and FEC now form individual integrated circuit (satellite channel decoder of the individual splinter). Descrambler of the DESCR block receives the transportation packages and is located in connection with the main processor by a parallel bus, to the fast data to permit transmissions. It preselects and creeps the packages of the necessary program under controlling of the conditioned entrance device. Sometimes this function is combined with the Demultiplexer. Demultiplexer the DEMUX selects, by means of the programmable filters, the PES before packages, which correspond to the program selected from the user. MPEG the audio and videopes exits of the Demultiplexer are applied to the entrance of the MPEG block, which combines generally MPEG audio and video functions and the diagram expensive desk functions necessarily among other things for the electronic program leader (EPG). MPEG-2, required decodes generally, 16 Mbits at least of D-RAM (sometimes more for the decoding 625 line signals, hanging off on the abilities of the memory management). Digital video coder (DENC) video signals again developed applied by the decoder MPEG-2 (digital YUV of signals CCIR 656 in the format) then to a digital video coder (DENC) that their transformation into similar RGB+ guarantees synchronization. for the optimum quality of the announcement on a television over 149 that the whole circuit steers, interprets users of instructions of remote control and handles the smart card reader and the communication interfaces, those generally is present. The software amounts to many hundreds of kilobytes, which partly located EPROM immediately for alternatively released Video Head Set updates are to be made possible during the lifetime of the product (away of air or over the DFV connections). The four block DEMUX, MPEG, DENC, and cut now in an integrated way in individual IC frequently characterized as individual splinter source decoder. Smart card reader the conditioned entrance device covers generally or two of these (one could be for a cheque card, for example). In case of A you (announces slots in the form of the PCMCIA) attach removable conditioned entrance module using the DVB-CI Common, the conditioned entrance electric circuits and the Descrambler are in the removable Video Head Set PCMCIA module. The Demultiplexer integrated into the IRD receives the packages „in the free “(crept). The external world (PC, modem to be connected, etc.) knows DFV connections the IRD by means of one or several DFV connections. Traditional (parallel) ports the RS232 (standard) and IEEE1284 bend to be gradually 150]] >
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Video Head Set
