Patent ID: 7856316
Filing Date: 2010-12-21
Classification: G01C

Abstract:
1. A portable device, comprising: a display portion that displays map information for a predetermined area; a receiving portion that receives a broadcast stream having a commercial message; a producing portion that produces, from the broadcast stream, a first content, including at least one of a video signal and an audio signal, and a second content, including keyword information, the keyword information containing a plurality of keywords; a recording portion that records a plurality of predetermined keywords associated with position information, specified in the map information data; and a matching portion that matches said keyword information with the plurality of predetermined keywords for finding at least one identified recorded keyword consistent with the keyword information, and upon matching said key word information: automatically determines a current navigational position of the portable device, automatically identifies at least one landmark, associated with the at least one identified recorded keyword, within a map image, and automatically displays the current navigational position within the map image and the at least one identified landmark within the displayed map image.