Abstract: A travel direction designating unit designates a travel direction of a travel lane where a subject vehicle travels, by using an image of a paint photographed by an in-vehicle camera. On the other hand, a travel direction extracting unit extracts a travel direction in which the subject vehicle should travel in line with a route to a destination from the current position of the subject vehicle. Further, a determining unit determines whether the extracted travel direction in line with the route matches with the designated travel direction. It is thereby determined whether the subject vehicle travels towards a proper road.

Abstract: A music data storage medium stores, as well as multiple music compositions, a feature phrase database composed of data relating to respective feature phrases of the multiple music compositions. When a preview and reproduction process for a feature phrase is started, based on the feature phrase data, only the feature phrase of each of the music compositions is reproduced. The entire data of a music composition that a user prefers listening to is extracted from the music data storage medium by being selected when its feature phrase is reproduced; then, the entire music composition of the music composition is reproduced.

Abstract: A map display device, which imparts a perspective feeling to a route guidance line so that it can be easily viewed, when buildings and roads are three-dimensionally displayed. A map display device having a control unit for three-dimensionally displaying a map and further three-dimensionally displaying a route guidance line on a road on the map. When the route guidance line is hidden by a building, the control unit displays overlapped portion of the route guidance line in a color different from the color of the portions that are not overlapping. In particular, the control unit draws picture by a semitransparent method in which the color displaying the route guidance line and the color displaying the building are alternately changing with a pixel as a unit on the video RAM (VRAM). In this case, a positional relationship becomes clear between the route guidance line and the building, and the route guidance line can be seen more clearly.