Abstract: An information processing apparatus wherein a plurality of operating systems operate on a single processor and a framework (shared object) enabling reliable and quick sharing of correct information between the plurality of operating systems is provided. The apparatus has a function the plurality of operating systems can create, register and refer to the shared object which provides an interface for registration and reference of information. The shared object is operated so that, while one of the operating systems is registering information or referring thereto, the other operating system is inhibited from registering the information and referring thereto. When one operating system finished the registration or reference of the information, one operating system informs the other operating system of the fact.

Abstract: The method entails using three dimensional map data including information Indicating horizontal locations of map constituent elements such as topographical features, roads, buildings and information indicating heights or elevations or altitudes of at least some of the map constituent elements located in parts of available horizontal map area. A perspective map looking from a view point toward a ground plane is generated by executing coordinate transformation procedures on the map information, and a scenery Image corresponding to the perspective map is displayed on a display device. The view point for generating the perspective map Is established above a height of a map element existing at a location specified in response to the current location of the moving object, and the height of the view point Is renewed with movement of the object. The view point setting unit repeats Its view point setting procedure when renewed location information has movement of the moving object.

Abstract: There is provided a map display device and a navigation device for displaying a three-dimensional map in which information which is originally hidden can be displayed on a display frame (screen). The map display device (navigation device) includes a map storing unit for storing three-dimensional data of each map constituent, and a map display unit for forming a three-dimensional bird's-eye view map which is obtained by projecting onto the plane from a desired view point each map constituent which is specified by the three-dimensional data stored in the map storing unit, and displaying the three-dimensional bird's-eye view map thus formed on a display frame (screen).

Abstract: To display a current position of a vehicle along a road in a stereoscopic map drawn based on three-dimensional map data, a navigation device forms a picture image superposing the current position of the vehicle on a perspective map viewing a three-dimensional ground surface from a direction forming a predetermined angle with respect thereto based on data read from a map data base and displays the image on a screen of a display and a position correcting unit 52 calculates an altitude at a position in the map in correspondence with the current position of the vehicle based on altitude data read from the map data base.

Abstract: An image restoring apparatus is provided that can restore an image disturbed by transmission error to a natural image in real time even if the transmission error occurs frequently. The image restoring apparatus has refresh control means for updating all the image data of a frame, inframe correcting means for effecting correction processing in the frame, and selecting means for selecting either of the refresh control means or the in-frame correcting means by detecting of number or positions of blocks having an error in the pixel data of the frame.

Abstract: A document communication apparatus includes an input unit for giving various indications such as document processing; a communication unit for transmitting and receiving information and rules of document processing in communication with another document communication apparatus, and an information processing unit for processing document information based on the received rules of document process Further, a communication apparatus for transmitting or receiving information among plural communication apparatuses makes it possible to transmit and receive a document with the rules of document processing corresponding to the content of at least a request for document processing.