Patent ID: 8837641

Claim:
A digital broadcast receiver for receiving broadcasts in a first broadcast protocol and a second broadcast protocol that use a plurality of frequency bands in which at least one or more frequency bands are overlapping frequency bands, the digital broadcast receiver comprising: a first tuner for receiving an electromagnetic wave and generating an electrical signal from the electromagnetic wave; a first demodulator for demodulating the electrical signal obtained from the first tuner and generating a first digital signal conforming to the first broadcast protocol; a first demultiplexer for separating first data including tuning information from the first digital signal; a first controller for controlling the first tuner, the first demodulator, and the first demultiplexer and executing a channel scan in the first broadcast protocol; a second tuner for receiving an electromagnetic wave and generating an electrical signal from the electromagnetic wave; a second demodulator for demodulating the electrical signal obtained from the second tuner and generating a second digital signal conforming to the second broadcast protocol; a second demultiplexer for separating second data including tuning information from the second digital signal; and a second controller for controlling the second tuner, the second demodulator, and the second demultiplexer and executing a channel scan in the second broadcast protocol; wherein the first controller and the second controller divide between them a plurality of channels included in the overlapping frequency band of the first broadcast protocol and the second broadcast protocol and execute channel scans in parallel as a first phase channel scan; in the first phase channel scan, the first controller executes a channel scan in the first broadcast protocol and generates, from information indicating reception status from the first tuner and the first demodulator, a first scan use channel list indicating channels in which a broadcast wave not belonging to the first broadcast protocol is likely to be present; in the first phase channel scan, the second controller executes a channel scan in the second broadcast protocol and generates, from information indicating reception status from the second tuner and the second demodulator, a second scan use channel list indicating channels in which a broadcast wave not belonging to the second broadcast protocol is likely to be present; and after the first phase channel scan, the first controller executes a channel scan in the first broadcast protocol on the channels indicated in the second scan use channel list, and the second controller executes a channel scan in the second broadcast protocol on the channels indicated in the first scan use channel list.