Patent ID: 7788545

Claim:
A broadcast receiving device comprising: a television broadcast signal receiving tuner; an IC card with a television broadcast signal descrambler; a card slot configured to accept the IC card; a fan configured to rotate to cool the IC card; a temperature sensor configured to measure a first temperature inside the broadcast receiving device; a memory component configured to store correlation information indicating a correlation between the first temperature measured by the temperature sensor and a second temperature of the IC card; and a control unit configured to acquire the second temperature of the IC card based on the first temperature measured by the temperature sensor and the correlation information stored in the memory component, determine if the second temperature of the IC card exceeds a predetermined temperature, and switch from a first television broadcast signal output mode, in which a scrambled television broadcast signal passes through the descrambler to output a descrambled audio-video signal is outputted via the IC card, to a second television broadcast signal output mode, in which a subsequent television broadcast signal is outputted by bypassing the IC card, when the control unit determines that the second temperature of the IC card exceeds the predetermined temperature.