Patent ID: 9043858
Filing Date: 2015-05-26
Classification: H04H,H04N

Abstract:
1. A digital broadcast receiver mounted on a mobile body, the digital broadcast receiver comprising: a tuner configured to receive a broadcast signal of a physical channel transmitted by digital broadcasting; a signal intensity detector configured to detect a signal intensity of the broadcast signal received by the tuner; a current position detector configured to detect a current position of the mobile body; a movement direction detector configured to detect a movement direction of the mobile body; a reception judging unit configured to control the tuner to judge whether or not the physical channel can be received; an area information storage unit configured to store receivable area information indicating a receivable area of the physical channel; and an area information updating unit configured to extend the receivable area of the physical channel stored in the area information storage unit, when the reception judging unit judges that the physical channel can be received, by determining an extension distance according to the signal intensity of the broadcast signal at the current position and calculating a first position located ahead of the current position in the movement direction an amount corresponding to the determined extension distance as an extended receivable position, and update the receivable area information stored in the area information storage unit to include the calculated extended receivable position.