Patent ID: 7945708

Claim:
A data receiver apparatus comprising: input ports which comply with a prescribed digital interface standard; and a switching device which is configured to select any one of the input ports, wherein each of the input ports comprises a voltage signal terminal configured to receive a prescribed voltage signal transmitted from a data transmission apparatus, a detection terminal configured to output a connection detection signal to the data transmission apparatus, a data input terminal configured to receive a data signal transmitted from the data transmission apparatus, and an address terminal configured to transmit a physical address to the data transmission apparatus, and the switching device which is configured to select data signals supplied from the data input terminals of the input ports, and the data receiver apparatus further comprising: nonvolatile storage devices each of which is connected between the address terminal and the switching device and which are configured to store physical addresses associated with the input ports; and a setting unit which is configured to set the connection detection signal output from the detection terminal of the input ports to a detection-state voltage irrespective of whether the switching device selects the data input terminal of the input ports.