Patent ID: 7145609

Claim:
A method of processing input signals of a display appliance having a plurality of external input terminals and connected to a set top box with a plurality of external input terminals, comprising: a) detecting a connecting state to the set top box, a signal receiving state from the set top box, a signal receiving state via the external input terminals of the display appliance; b) selecting and outputting any one of signals supplied from the set top box and signals supplied via the external input terminals of the display appliance, wherein selecting and outputting any one of the signals comprises: if the signal is inputted from the set top box only, selecting and outputting the signal inputted from the set top box, if the signal is not inputted from the set top box and the signals are inputted from the input terminals of the display appliance only, selecting and outputting any one of the signals, and if the signals are inputted from the set top box and the input terminals of the display appliance, selecting and outputting the signal inputted from the set top box, and c) during outputting the selected signal, if a user requests to output a signal inputted from any one of the external input terminals of the set top box and the display appliance, selecting and outputting the selected signal.