Navigation system
First Claim
1. A navigation method performed by a portable navigation device, comprising:
- reading map information for a predetermined wide area from a recording disk;
receiving a broad cast stream having a navigation messageproducing, 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;
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 with the plurality of predetermined keywords;
automatically determining a current navigational position of the portable navigation device;
automatically identifying at least one landmark, associated 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.
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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.
36 Citations
10 Claims
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1. A navigation method performed by a portable navigation device, comprising:
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reading map information for a predetermined wide area from a recording disk; receiving a broad cast stream having a navigation 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; 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 with the plurality of predetermined keywords; automatically determining a current navigational position of the portable navigation device; automatically identifying at least one landmark, associated 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