Xanavi Informatics Corporation Patent applications |
Patent application number | Title | Published |
20120004836 | Method of Estimation of Traffic Information, Device of Estimation of Traffic Information and Car Navigation Device - There is provided a method and a device for accurately estimating traffic information of a link having no traffic information even if different types of roads are mixed. The device finds a parameter characterizing a damping curve of a quantity of change of relative speed based on stored traffic information for links on a city center side on a minimum-time cost route connecting the city center and suburbs, finds a quantity of change of relative speed of the link having no observed traffic information and estimates its traffic information based on the damping curve. The device also calculates a ratio of quantities of change of relative speed of two links whose road types change as a speed change similarity ratio and estimates traffic information of the link of a second road type from known traffic information of the link of a first road type by using that ratio. | 01-05-2012 |
20110307648 | Map Data Product, Map Data Processing Program Product, Map Data Processing Method and Map Data Processing Device - A first data product that can be read into a computer or a map data processing apparatus, contains therein map data having map-related information of a map. The map data includes: a structure having the map-related information divided into units of a plurality of divisions into which the map is divided; and a structure having management information for the map-related information divided into units of the divisions, and: the map-related information obtained by the computer or the map data processing apparatus can be updated in units of the individual divisions by using the management information. | 12-15-2011 |
20110010068 | VEHICLE SPEED CONTROL SYSTEM - A vehicle speed control system includes: a unit for computing a first target velocity based on map information; a unit for computing a second target velocity based on a road profile obtained from other information than the map information (such as lane recognition using a camera); a unit for comparing the first target velocity and the second target velocity; a unit for selecting a lower target velocity therefrom; and a unit for controlling a vehicle velocity in accordance with the selected target velocity. | 01-13-2011 |
20100076680 | VEHICLE NAVIGATION SYSTEM WITH INTERSECTION DATABASE - A vehicle navigation system having a processor having access to a map database. An input device enters the destination to the processor and the processor, using data from the map database, calculates a preferred route to the destination. That preferred route is then displayed on a video display. The map database includes a road link database as well as an intersection database which is separate from the road link database which enables a destination to be entered to the input device by an intersection. | 03-25-2010 |
20100057334 | METHOD AND SYSTEM TO ESTIMATE VEHICLE TRAFFIC CONDITIONS - A method and system to estimate vehicle traffic conditions for use in a vehicle navigation system. The system includes a cellular network which receives position data from a plurality of GPS enabled cellular telephones. A processor in the cellular network is programmed to estimate the traffic conditions or density of traffic on at least one road link based upon the received position data while a transmitter at the base station then transmits that estimated traffic condition to automotive vehicles containing navigation systems. A processor in the navigation system then utilizes the estimated traffic conditions for route and/or arrival time calculations. | 03-04-2010 |
20090299621 | AUTOMOBILE NAVIGATION APPARATUS - An automobile navigation apparatus, that has a rewritable recording medium and capability to updates the map data base by obtaining latest map data, records the map data in the recording means and comprises updating data acquisition means that acquires updated data of a map to which updating procedure is added, an information interpreting means that interprets the updating procedure information, and a map data updating means that searches over said map data base and updates said map data base on the basis of the results of such interpretation and manages the map data by using attributions that indicates additional information of the map elements which are composed into a table as the records thereof so that the row record of the table is classified by the attribution which indicates the additional information of the map element. | 12-03-2009 |
20090265091 | METHOD AND APPARATUS UTILIZING BOTH STATISTICAL AND REAL TIME DATA FOR A VEHICLE NAVIGATION SYSTEM - A method for determining a preferred route of road links between an origin and a destination in a vehicle navigation system. A boundary is established the origin and a destination and real time road link data is acquired for road links between the origin and the boundary. Similarly, road link data from a statistical database is retrieved from a road link database for road links between the boundary and the destination. The preferred route between the origin and the destination is then calculated as a function of both said real time road link data and statistical road link data and the calculated route is displayed on a screen. | 10-22-2009 |
20090240429 | METHOD FOR ROUTE PLANNING ON A NAVIGATION SYSTEM INCLUDING POINTS OF INTEREST - A method for route planning for use with a vehicle navigation system. The method includes the steps of inputting a route origin and route destination on a computer separate from the navigation system, such as a PC. The user also inputs activities or points of interest. The computer then searches a point of interest database which matches the activities inputted by the user and calculates a preferred route from the origin and to the route destination. The preferred route, together with data relating to the points of activity, are then wirelessly transmitted to the navigation system for subsequent display on the navigation system screen. | 09-24-2009 |
20090157296 | Navigation Apparatus - A navigation apparatus comprises a map display control unit that displays a map on a display monitor, a voice information outputting unit that outputs voice information related to traveling of a vehicle, and a highlighting unit that highlights a part of the map that corresponds to the voice information in synchronization with output of the voice information by the voice information outputting unit. | 06-18-2009 |
20090157295 | Navigation Apparatus - A navigation apparatus comprises a route setting unit that sets a route, a route characteristic point setting unit that sets a plurality of route characteristic points to the route set by the route setting unit, a priority setting unit that sets priority to each of the route characteristic points set by the route characteristic point setting unit, a selecting unit that selects any of the route characteristic points based upon the priority set by the priority setting unit, and a display control unit that displays the route and the route characteristic point selected by the selecting unit on a display monitor. | 06-18-2009 |
20090088963 | SYSTEM AND METHOD FOR GEOGRAPHIC INTERPOLATION OF TRAFFIC DATA - A method for geographic interpolation of traffic data in a vehicle navigation system in which the navigation system includes a map database divided into geographic meshes. Each mesh includes a plurality of road links of different types. That data also includes a first set of meshes containing traffic flow data while a mutually exclusive second set of meshes contains no such traffic flow data. A border between the first and second set of meshes is first identified and thereafter a blend zone of blend meshes is created by selecting at least one mesh adjacent the border so that the blend mesh is interposed between the first and second set of meshes. Thereafter, the traffic data for each type of road link in the blend mesh is adjusted to a value intermediate the first and second set of adjacent meshes for each type of road link and the blend mesh data is then stored. | 04-02-2009 |
20090082960 | NAVIGATION SYSTEM WITH ENHANCED DISPLAY FUNCTIONS - A method and apparatus for enhancing a user's visual perception of map data in a navigation system of the type used in automotive vehicles. A portion of an object, such as a building, is selected on the screen and a perspective view of the three-dimensional map data corresponding to the selected portion of the object is then depicted on the display screen. In a second form, a map is displayed on the display screen together with the route between the current position of the vehicle and a desired vehicle destination. A portion of the route is selected between the current position of the vehicle and the vehicle destination while the expected time for the vehicle to reach the selected portion is then displayed on the display screen. | 03-26-2009 |
20090048775 | Method and System for Route Searching, and Navigation Apparatus Using the Same - A route searching method is provided which allows drivers having mutually similar traveling purposes and preferences to find highly convenient routes by sharing their route searching know-how. A center apparatus ( | 02-19-2009 |
20090037100 | Route Search Device and Route Search Method - A route to a destination in which required travel time barely varies depending on weather is searched for without referring to weather forecast or weather information. A route search device comprises following means: a storage medium for storing traffic information including travel times by weather conditions for each link comprising a road on a map; a pointing device which sets a starting point and a destination; a weather condition-based route search module that determines the shortest travel time route from the starting point to the destination by weather conditions using the traffic information stored in the storage medium; a link series-identifying module that extracts link series which vary with weather conditions from link series comprising the shortest travel time route determined by the weather condition-based route search module, determines the required travel time by weather conditions for the each link series that vary with weather conditions by using the traffic information stored in the storage medium, and identifies a link series whose required travel time barely varies depending on weather conditions; and a link series-registering medium that registers the link series identified by the link series-identifying module as a link series comprising a guide route from the starting point to the destination. | 02-05-2009 |
20090030596 | Traffic Information Providing System, Apparatus, Method, And In-Vehicle Information Apparatus - When receiving a traffic information providing request, a traffic information providing apparatus analyzes which area's traffic information is requested based on the received request information. Traffic information of road links located in the requested area is read from the traffic information, and it is determined whether the road links' traffic information is similar or not. Similar links configure a link group, and traffic information corresponding to the link group is created. Traffic information of the configured link group is delivered to an in-vehicle information apparatus. | 01-29-2009 |
20080319639 | Predictive Traffic Information Creating Method, Predictive Traffic Information Creating Apparatus, and Traffic Information Display Terminal - There is provided a predictive traffic information creating method for a predictive traffic information creating apparatus connected via a communication network to a traffic information center that delivers live traffic information regarding a predetermined road network at a predetermined time interval; includes an information processor and information storage for storing at least statistical traffic information regarding links included in the road network; and when an incident occurs in the road network, creates predictive traffic information regarding after the incident. The method includes, on the information processor, receiving the live traffic information delivered from the traffic information center, and detecting the incident in the road network based on the received live traffic information; setting predictive environment parameters including parameters regarding traffic restriction in accordance with the detected incident; and creating the predictive traffic information at a time after the incident occurs based on the set predictive environment parameters and the statistical traffic information. | 12-25-2008 |
20080312811 | TRAFFIC INFORMATION PROVIDING SYSTEM AND METHOD FOR GENERATING TRAFFIC INFORMATION - The invention relates to a method for generating traffic information to be used in a car navigation system, comprising the steps of acquiring traffic information data including information relating to a travel time of links making up a road on a map and for acquiring map data relating to the link, the map data comprising at least information on a road type of the link and checking if a volume of the traffic information data available in is sufficient for performing a statistical estimate for the travel time. In order to enhance the traffic information generated, it is proposed to use the steps of checking if the volume of traffic information data relating to links located in a target area is sufficient and adapting a size of the target area depending on the amount of available traffic information data. | 12-18-2008 |
20080294331 | Method of Estimation of Traffic Information, Device of Estimation of Traffic Information and Car Navigation Device - There is provided a method and a device for accurately estimating traffic information of a link having no traffic information even if different types of roads are mixed. The device finds a parameter characterizing a damping curve of a quantity of change of relative speed based on stored traffic information for links on a city center side on a minimum-time cost route connecting the city center and suburbs, finds a quantity of change of relative speed of the link having no observed traffic information and estimates its traffic information based on the damping curve. The device also calculates a ratio of quantities of change of relative speed of two links whose road types change as a speed change similarity ratio and estimates traffic information of the link of a second road type from known traffic information of the link of a first road type by using that ratio. | 11-27-2008 |
20080275631 | On-Vehicle Map Display Apparatus, Map Display Method - This on-vehicle map display apparatus comprises a map scale setting unit that sets a map scale, a summary map generation unit that generates a summary map by abbreviating road shapes if a map scale that is less than a predetermined scale is set by the map scale setting unit, a summary map display control unit that displays the summary map generated by the summary map generation unit upon a display monitor, a congestion information acquisition unit that acquires congestion information, and a congestion information display control unit that displays the congestion information acquired by the congestion information acquisition unit as superimposed upon the summary map displayed upon the display monitor by the summary map display control unit. | 11-06-2008 |
20080228712 | Search Data Update Method and Search Data Update System - A search data update system includes a navigation apparatus | 09-18-2008 |
20080228396 | SYSTEM AND METHOD FOR UPDATING A STATISTICAL DATABASE IN A VEHICLE NAVIGATION SYSTEM - In a navigation system of a vehicle having a statistical database containing travel information for a plurality of road links, a method and system for updating data contained in the statistical database. Real-time travel data for the vehicle is acquired for at least one of the road links in the statistical database as the vehicle travels between the end nodes of that road link. The acquired real-time travel data is then processed to ensure that it meets certain criteria, e.g. the absence of nonrepeating incidents. Travel data which meets that criteria is then utilized to update the road link data in the statistical database. The travel data acquisition, processing and updating of the statistical database is performed internally in the navigation system without interconnecting to external servers. | 09-18-2008 |