Navigation system
First Claim
1. A navigation method performed by a portable device, comprising:
- displaying map information for a predetermined area;
receiving a broadcast stream having a commercial message;
producing, 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;
recording a plurality of predetermined keywords associated with position information, specified in the map information data; and
matching 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 keyword information;
automatically determining a current navigational position of the portable device,automatically identifying at least one landmark, associated with the at least one identified recorded keyword, within a map image, andautomatically displaying the current navigational position within the map image and the at least one identified landmark within the displayed map image.
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Accused Products
Abstract
Disclosed are a navigation system and/or a point information display method and a program. The navigation system consists mainly of: a stream receiver that receives broadcast streams; a data decoder that samples a data signal from the received streams and decodes the data signal into character string information; a matching block that performs matching to compare a predetermined keyword, which is associated with position information specified in map information data, with stored keywords and searches a keyword consistent with the keyword contained in the character string information; a position information searching block that searches position information associated with the keyword contained in the character string information and detected to be consistent with a stored keyword by the matching block; and a display unit that displays the detected position information while superimposing it on a display image.
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Citations
10 Claims
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1. A navigation method performed by a portable device, comprising:
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displaying map information for a predetermined area; receiving a broadcast stream having a commercial message; producing, 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; recording a plurality of predetermined keywords associated with position information, specified in the map information data; and matching 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 keyword information; automatically determining a current navigational position of the portable device, automatically identifying at least one landmark, associated with the at least one identified recorded keyword, within a map image, and automatically displaying the current navigational position within the map image and the at least one identified landmark within the displayed map image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification