Patent ID: 8160523

Claim:
A channel detecting method for digital broadcast, which executes the following processes: a tuning process for setting a channel in a predetermined frequency band with respect to a broadcast wave constituted of a digital signal, based on scan instructions for the broadcast wave, selecting the set channel and tuning in thereto; a synchronous establishment process for performing synchronous establishment on a result of the tuning process thereby to output a synchronous recovery signal and starting to count a predetermined time; a determining process for determining whether broadcasting is being conducted over the channel before the counting of the predetermined time is completed; a demodulating process for demodulating the synchronous recovery signal thereby to output a transport stream signal; a decode process for decoding the transport stream signal and extracting a broadcast parameter with respect to the transport stream signal; and a transition process for receiving instructions for transition to a next said channel when the extraction of the broadcast parameter is completed or the broadcast parameter is unextractable, and when the counting of the predetermined time is completed, setting the next said channel to the tuning process if the channel is found not to be a final channel and terminating channel detection if the channel is found to be the final channel.