Patent ID: 7158190
Filing Date: 2007-01-02
Classification: H04N

Abstract:
1. In a broadcasting receiver comprising a broadcasting receiving unit for receiving a television broadcasting signal, and a memory for storing a channel map storing for each of broadcasting channels receivable channel information or information indicating that receiving is impossible, the broadcasting receiving unit comprising a first digital receiving unit and a second digital receiving unit, a broadcasting receiver comprising: first channel searching means for tuning in to the broadcasting channels in a predetermined order using the first digital receiving unit, judging for each of the broadcasting channels whether or not broadcasting is receivable, and storing, with respect to the broadcasting channel on which broadcasting is receivable, the receivable channel information in the channel map, while storing, with respect to the broadcasting channel on which broadcasting is not receivable, the information indicating that receiving is impossible; and second channel searching means for tuning in to the broadcasting channels in an order opposite to the first channel searching means using the second digital receiving unit, judging for each of the broadcasting channels whether or not broadcasting is receivable, and storing, with respect to the broadcasting channel on which broadcasting is receivable, the receivable channel information in the channel map, while storing, with respect to the broadcasting channel on which broadcasting is not receivable, the information indicating that receiving is impossible, each of the channel searching means comprising means for judging, when a search for the subsequent channel is started, whether or not the receivable channel information or the information indicating that receiving is impossible is stored in the channel map with respect to the subsequent channel, means for starting the search for the subsequent channel when the receivable channel information or the information indicating that receiving is impossible is not stored in the channel map with respect to the subsequent channel, and means for terminating the channel search when the receivable channel information or the information indicating that receiving is impossible is stored in the channel map with respect to the subsequent channel.