Navigation system
First Claim
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, andautomatically displays 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
21 Claims
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1. A portable device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A portable device, comprising:
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means for displaying map information for a predetermined area; means for receiving a broadcast stream having a commercial message; means for 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; means for recording a plurality of predetermined keywords associated with position information, specified in the map information data; and means for 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 key word 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.
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12. A computer program product for assisting navigation using a portable device, the computer program product comprising a computer readable medium having program code stored therein, the program code being executable to perform operations 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 key word 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 (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification