An information processing system comprising: a plurality of descrambling modules (2-1, 2-2, 2-3); and a plurality of broadcast signal receivers (1-1, 1-2) each coupled via an IEEE1394 bus to said plurality of descrambling modules (2-1, 2-2, 2-3) enabling output of data from each of said plurality of broadcast signal receivers to each of said plurality of descrambling modules; wherein each of said broadcast signal receivers (1-1, 1-2) comprises: receiving means for receiving broadcasting signals; selection means for selecting signals of a predetermined channel from said broadcasting signals received by said receiving means; demodulating means for demodulating a predetermined channel selected by said selection means into a data stream composed of a plurality of information; a receiver interface complying with the IEEE1394 standard for outputting said data stream demodulated by said demodulation means to any one of said plurality of descrambling modules (2-1, 2-2, 2-3); and each of said plurality of descrambling modules (2-1, 2-2, 2-3) comprises: a descrambler interface complying with the IEEE1394 standard for inputting a data stream processed by one of said plurality of broadcast signal receivers (1-1, 1-2);and descrambling means for descrambling said data stream input by said descrambler interface; and wherein said descrambler interface is configured to output said data stream descrambled by said descrambling means to said one of said plurality of broadcast signal receivers (1-1, 1-2); and each of said broadcast signal receivers further comprises: demultiplexing means for demultiplexing said data stream descrambled by said descrambler means and received from any one of said plurality of descrambling modules through said receiver interface; and decoding means for decoding said demultiplexed data stream from said demultiplexing means. a plurality of descrambling modules (2-1, 2-2, 2-3); and a plurality of broadcast signal receivers (1-1, 1-2) each coupled via an IEEE1394 bus to said plurality of descrambling modules (2-1, 2-2, 2-3) enabling output of data from each of said plurality of broadcast signal receivers to each of said plurality of descrambling modules; wherein each of said broadcast signal receivers (1-1, 1-2) comprises: receiving means for receiving broadcasting signals; selection means for selecting signals of a predetermined channel from said broadcasting signals received by said receiving means; demodulating means for demodulating a predetermined channel selected by said selection means into a data stream composed of a plurality of information; a receiver interface complying with the IEEE1394 standard for outputting said data stream demodulated by said demodulation means to any one of said plurality of descrambling modules (2-1, 2-2, 2-3); and receiving means for receiving broadcasting signals; selection means for selecting signals of a predetermined channel from said broadcasting signals received by said receiving means; demodulating means for demodulating a predetermined channel selected by said selection means into a data stream composed of a plurality of information; a receiver interface complying with the IEEE1394 standard for outputting said data stream demodulated by said demodulation means to any one of said plurality of descrambling modules (2-1, 2-2, 2-3); and each of said plurality of descrambling modules (2-1, 2-2, 2-3) comprises: a descrambler interface complying with the IEEE1394 standard for inputting a data stream processed by one of said plurality of broadcast signal receivers (1-1, 1-2);and descrambling means for descrambling said data stream input by said descrambler interface; and wherein said descrambler interface is configured to output said data stream descrambled by said descrambling means to said one of said plurality of broadcast signal receivers (1-1, 1-2); and a descrambler interface complying with the IEEE1394 standard for inputting a data stream processed by one of said plurality of broadcast signal receivers (1-1, 1-2);and descrambling means for descrambling said data stream input by said descrambler interface; and wherein said descrambler interface is configured to output said data stream descrambled by said descrambling means to said one of said plurality of broadcast signal receivers (1-1, 1-2); and each of said broadcast signal receivers further comprises: demultiplexing means for demultiplexing said data stream descrambled by said descrambler means and received from any one of said plurality of descrambling modules through said receiver interface; and decoding means for decoding said demultiplexed data stream from said demultiplexing means. demultiplexing means for demultiplexing said data stream descrambled by said descrambler means and received from any one of said plurality of descrambling modules through said receiver interface; and decoding means for decoding said demultiplexed data stream from said demultiplexing means.