Patent ID: 7606527

Claim:
A digital broadcast receiving device mounted on a mobile body, comprising: a mobile body information obtaining means which obtains mobile body information that is information about the mobile body; a demodulating means which receives a digital broadcast wave, demodulates the digital broadcast wave, and outputs a reception state of the digital broadcast wave; plural digital broadcast decoders which decode a signal demodulated by the demodulating means and output digital broadcast images different from one another; a switching threshold storing means which associates with the mobile body information and stores in advance a switching threshold used in choosing, in accordance with the reception state, which one of the plural digital broadcast decoders is to decode the signal demodulated by the demodulating means; and a decoder switching means which consults the switching threshold storing means to obtain a switching threshold that is associated with the mobile body information, which chooses one of the digital broadcast decoders, based on the reception state and the obtained switching threshold, to decode the signal demodulated by the demodulating means, and which displays results of the decoding on a display device.