Patent ID: 7137138

Claim:
A broadcast signal receiving system comprising a retransmission device for collectively receiving a plurality of high-frequency signals of different broadcast signaling systems and converting the received signals into high-frequency signals of a common signaling system, and a plurality of display devices for receiving the high-frequency signals transmitted from the retransmission device and displaying contents of the received signals, wherein the retransmission device is provided with a plurality of broadcast receiving means for receiving and demodulating the plurality of high-frequency signals of different broadcast signaling systems, and converting the received signals into a plurality of different baseband signals, a signal selecting means for selecting one or plural baseband signals from the plurality of different baseband signals, a parallel-to-serial converting means for inputting in parallel the baseband signals outputted from the signal selecting means, rearranging the inputted signals into serial signals and outputting the serial signals, and a common signal transmitting means for converting the baseband signals from the parallel-to-serial converting means into high-frequency signals of the common signaling system and transmitting the converted signals, and each of the plurality of display devices is provided with a common signal receiving means for receiving the high-frequency signals of the common signaling system and a display means for displaying the broadcast contents of the received signals from the common signal receiving means, and wherein the plurality of broadcast receiving means comprise plural receivers and demodulators corresponding to the high-frequency signals of different broadcast signaling systems and power switching means for turning on and off respective power supply circuits of the plural receivers and demodulators, and the signal selecting means turns ON the power supply circuits of the receiver and demodulator related to the selected baseband signal and turns OFF the power supply circuits related to other receivers and demodulators.