JP2006023160A - Navigation device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a risk of an in-vehicle navigation device for a vehicle getting out of a service area of a broadcast station for radio transmission. <P>SOLUTION: This in-vehicle navigation device for a vehicle displays the service area of the broadcast station so that it is superposed on a map based on broadcast station data, and concurrently with the display, further displays the name of the broadcast station, a way on the map to a radio transmission base station of the broadcast station, and the distance from a present position to the base station. Further, the selection of a route from the present position to a set destination is performed by two methods: a method with it taken into account that the route is within the service area and a method without taking it into account. Two routes selected by these two methods are displayed as guidance route candidates on an image display device in such a form as to urge a user to make a selection. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an in-vehicle vehicle navigation apparatus that displays a receivable area of a broadcasting station such as a radio or a television.

  2. Description of the Related Art Recent vehicle navigation devices are equipped with a television reception function and a radio reception function, and can receive broadcasts from wireless broadcast stations in the vehicle.

  However, the range in which the radio wave from the radio transmission base station of the broadcasting station reaches, that is, the receivable area is limited. As illustrated in the Kanto map of FIG. 5, the receivable area of the base station 61 is, for example, an area indicated by hatching based on factors such as the topography of the area and changes in height.

  In addition, since the vehicle may be out of the receivable area of such a broadcast station, in such a case, the vehicle navigation device cannot receive information. If the crew member does not know what the coverage area of the broadcast station is, what kind of route can be taken to avoid being unreceivable, or where to go when it becomes unreceivable? If this is the case, it will not be clear whether the reception can be recovered.

  In view of the above, an object of the present invention is to reduce the possibility that a vehicle goes out of a receivable area of a radio transmission broadcasting station against the intention of a passenger.

  In order to achieve the above-mentioned object, the invention according to claim 1 is provided for each of a plurality of radio broadcast stations, including broadcast station data indicating the name of the broadcast station and information on the receivable area of the broadcast station, and map data. The name of the broadcasting station related to the broadcasting station data in the storage medium and the receivable area of the broadcasting station are superimposed on the storage medium to be stored and the map based on the map data in the storage medium, and displayed on the image display device And a display control means for controlling the vehicle.

  Since it is in this way, since the receivable area and the broadcast station name are displayed on the map, the user can visually recognize what the receivable area of which broadcast station is. Therefore, it is possible to reduce the risk that the vehicle navigation device goes out of the receivable area of the radio transmission broadcasting station.

  According to the second aspect of the present invention, for each of a plurality of radio broadcast stations, broadcast station data indicating the position of the radio transmission base station of the broadcast station and information on the receivable area of the broadcast station, and map data A map based on the map data in the storage medium, the direction on the map to the radio transmission base station of the broadcast station related to the broadcast station data in the storage medium, and reception of the broadcast station A vehicle navigation device comprising display control means for overlapping possible areas to be displayed on an image display device.

  This way, the map shows the coverage area and the direction to the radio transmission base station on the map, so the user is where the radio transmission base station is, and what is the coverage area. It is possible to visually recognize whether or not Therefore, it is possible to reduce the risk that the vehicle navigation device goes out of the receivable area of the radio transmission broadcasting station.

  According to a third aspect of the present invention, for each of the plurality of radio broadcast stations, the broadcast station name, the position of the radio transmission base station of the broadcast station, and information on the receivable area of the broadcast station are shown. Data, a storage medium for storing map data, and a map based on the map data in the storage medium, the name of the broadcast station related to the broadcast station data in the storage medium, to the radio transmission base station of the broadcast station A vehicle navigation device comprising: a display control means for displaying a direction on a map and a receivable area of a broadcasting station on an image display device in an overlapping manner.

  Since it is like this, the receivable area, the direction on the map to the radio transmission base station, and the broadcast station name are displayed on the map, so the user is where the radio transmission base station of which broadcast station is, And it is possible to visually recognize how the receivable area is. Therefore, it is possible to reduce the risk that the vehicle navigation device goes out of the receivable area of the radio transmission broadcasting station.

  According to a fourth aspect of the present invention, there is provided the vehicle navigation apparatus according to any one of the first to third aspects, wherein the receiving antenna having directivity and the broadcasting station related to the broadcasting station data in the storage medium. Antenna control means for directing the directivity of the receiving antenna in the direction of the radio transmission base station.

  In this way, even if the reception level from the broadcasting station is deteriorated, it is possible to suppress the deterioration of the reception state by directing the directivity of the receiving antenna toward the radio transmission base station.

  According to a fifth aspect of the present invention, there is provided a storage medium that stores broadcast station data indicating information on a receivable area of each broadcast station and map data for each of a plurality of radio transmission broadcast stations, Based on the map data and broadcast station receivable area information, the route from the current location to the set destination is selected as one of the priority selection conditions that the route is within the receivable area. Based on the first route selection means and the map data in the storage medium, the route from the current location to the set destination is determined to have a high rate that the route is within the receivable area. The image display apparatus displays both the second route selection means for selecting without selection and the routes selected by the first and second route selection means as guide route candidates to the destination. And 示制 control means, a vehicle navigation device characterized by comprising a.

  As a result, a route having a high rate in the receivable area of the guide broadcast station is preferentially selected and displayed as a guide candidate, so that the vehicle navigation device receives the radio transmission broadcast station. The risk of going out of the possible area can be reduced. In addition, a route that is not preferentially selected as a route with a high rate in the coverage area of the broadcasting station is also displayed as a guide route candidate, so that the options for the user are expanded.

  According to a sixth aspect of the present invention, there is provided a storage medium that stores broadcast station data indicating information on a receivable area of each broadcast station and map data for each of a plurality of wireless transmission broadcast stations, One of the priority selection conditions is that the route from the current location to the destination set based on the map data and the information on the receivable area of the broadcast station is a high rate that the route is in the receivable area. Route selection means for selecting, and display control means for causing the image display device to display the route selected by the route selection means as a guide route candidate to the destination, the route selection means on the expressway Regarding the route, the vehicle navigation device is characterized in that a high rate of being in the receivable area is not one of the priority selection conditions.

  As a result, a route having a high rate in the receivable area of the guide broadcast station is preferentially selected and displayed as a guide candidate, so that the vehicle navigation device receives the radio transmission broadcast station. The risk of going out of the possible area can be reduced. In addition, on a highway, whether or not the road is within the receivable area is not considered in route selection.

  Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows a hardware configuration of an in-vehicle vehicle navigation device 1 according to the present embodiment. The vehicle-mounted vehicle navigation device 1 includes a position detector 11, an operation switch group 12, an image display device 13, an audio amplifier 14, a speaker 15, a receiving device 16, a receiving antenna 17, an external storage medium 18, and a control circuit 19. is doing.

  The position detector 11 includes a well-known sensor (not shown) such as a geomagnetic sensor, a gyroscope, a vehicle speed sensor, and a GPS receiver, and the current position and direction of the vehicle based on the characteristics of each of these sensors. Is output to the control circuit 19.

  The operation switch group 12 includes a plurality of mechanical switches provided in the vehicle navigation device 1 and an input device such as a touch panel provided so as to overlap the display surface of the image display device 13. A signal based on the touch is output to the control circuit 19.

  The image display device 13 displays a video based on the video signal output from the control circuit 19 to the user. Examples of the display image include a map centering on the current location.

  The audio amplifier 14 amplifies the audio signal output from the control circuit 19 and outputs it to the speaker 15.

  The receiving device 16 has a plurality of tuners for receiving data from a plurality of media such as an analog TV tuner, a digital TV tuner, and an FM / AM radio tuner.

  Broadcast stations include satellite digital broadcast stations, terrestrial digital television broadcast stations, terrestrial analog television stations, FM, and AM radio stations. These broadcasting stations share or have a base station for wireless transmission of broadcast contents.

  Each tuner receives a radio signal of the frequency from a receiving antenna 17 that can receive a signal in a frequency band used by each broadcast station to be received, and the communication standard used by the broadcast station is applied to the signal. Predetermined predetermined frequency conversion, amplification, demodulation (such as FM, AM, QPSK, OFDM) and analog / digital conversion are performed, and data generated as a result of the processing is output to the control circuit 19.

  Further, each tuner, when receiving a reception channel selection from the control circuit 19, demodulates the signal of that channel and outputs the data of that channel to the control circuit 19.

  The receiving antenna 17 may be a collection of a plurality of antennas capable of receiving radio waves of different frequency bands, or one antenna may be capable of receiving radio waves of a plurality of frequency bands. As for the receiving antenna, antennas for the same frequency band are attached to the front end, the rear end, the right side surface, and the left side surface of the vehicle. The control circuit 19 can control which of the four antennas is used for reception. Therefore, the directivity of the receiving antenna 17 can be controlled as a whole.

  The external storage medium 18 is a non-volatile storage medium such as an HDD, and stores a program read and executed by the control circuit 19, map data for route guidance, and the like. Further, the external storage medium 18 of this embodiment stores broadcast station data.

  The broadcast station data has a plurality of entries for each broadcast station, and each entry includes a broadcast station name of the broadcast station, position information (for example, latitude and longitude) of one or more radio transmission base stations used by the broadcast station, And information regarding three items, ie, receivable area information (for example, latitude and longitude of a receivable area boundary) for each of the plurality of radio transmission base stations.

  The control circuit 19 has a RAM, a ROM, and a CPU (not shown). The CPU executes a program for the operation of the vehicle navigation apparatus 1 read from the ROM and the external storage medium 18, and in executing the program, reads information from the ROM, RAM, and external storage medium 18, Information is written to the external storage medium 18, and signals are output to, received from, or transferred to the position detector 11, the operation switch group 12, the image display device 13, the audio amplifier 14, and the receiving device 16.

  Specific processing performed by the CPU of the control circuit 19 by executing a program includes current position specifying processing, guidance route search processing, route guidance processing, TV / radio display processing, traffic / weather information utilization processing, and the like.

  The current position specifying process is a process for specifying the current position and direction of the vehicle using a known technique such as map matching based on the signal from the position detector 11.

  The guide route search process is a process of receiving an input of a destination by the user from the input device and calculating an optimum guide route from the current position to the destination.

  In the route guidance process, map data is read from the external storage medium 18, the calculated guidance route, memory point, and the like are displayed on the display device 12 together with the map data, and output to the display device 12 by voice, so that the user guidance route is obtained. This is a process for encouraging driving along.

  The TV / radio display processing is performed by controlling each tuner of the receiving device 16 based on the operation of the input device for starting TV / radio viewing by the user, selecting a receiving broadcast station (broadcast system and channel), and the like. A wireless video / audio signal from a radio broadcast station is received, and a video signal based on the video / audio signal is output to the image display device 13 and an audio signal is output to the audio amplifier 14.

  In the traffic / weather information utilization processing, the tuner of the receiving device 16 is controlled in order to acquire traffic information or weather information (for example, traffic information data included in a transmission signal of FM broadcast) included in a signal from a broadcasting station. Then, data of a predetermined channel is acquired, traffic information or weather information is extracted from the data, the extracted data is stored in the RAM of the external storage medium 18 or the control circuit 19, and the position operation switch group 12 by the user is set. An image signal based on the accumulated traffic information data or weather information data is output to the image display device 13 as necessary, such as when there is a request used.

  Further, the control circuit 19 repeatedly executes the program 100 shown as a flowchart in FIG. This program also serves as the route search process described above.

  First, in step 110, it is determined whether or not the broadcasting station is being used, that is, whether or not the control circuit 19 controls the receiving device 16 to receive data on a specific channel of a specific medium. If it is in use, the process proceeds to step 115. If it is not in use, the execution of the program 100 is terminated.

  In step 115, antenna control is performed. Specifically, the directivity of the receiving antenna 17 is directed toward the radio transmission base station of the receiving broadcast station. The position of the receiving radio transmission base station is specified based on the entry of the broadcast station in the broadcast station data in the external storage medium 18. At this time, when a plurality of radio transmission base stations are included in the entry, the position of the radio transmission base station closest to the current position is used. Alternatively, the position of a radio transmission base station that has a receivable area on the currently displayed map may be used.

  The directivity of the receiving antenna 17 is controlled by independently controlling the operation / non-operation of antennas that receive radio waves from the broadcasting station and are provided on the front, rear, left and right sides of the vehicle. Specifically, of the four antennas, an antenna close to the position of the specified wireless transmission base station is specified based on the current position and orientation of the vehicle, and only that antenna is used for reception.

  Subsequently, in step 120, it is determined whether or not the receiving broadcast station is a broadcast station providing traffic information. This determines whether or not the received data includes character string data indicating traffic information. If the traffic information is provided, the process of step 130 is subsequently executed. If the traffic information is not provided, the process of step 170 is subsequently executed.

  In step 130, it is determined whether a route search request is received. Specifically, if the user has received an input of a destination by operating the operation switch group 12 and a guidance route has not yet been determined for the destination, it is determined that a route search request has been received, and otherwise In this case, it is determined that the route search request has not been received. If it is determined that the route search request has been received, the process of step 140 is subsequently executed. If it is determined that the route search request has not been received, the execution of the program 100 is terminated.

  In step 140, a route is selected in consideration of the reception area of the broadcasting station determined to provide traffic information in step 120. Specifically, based on information on the receivable area of the broadcast station in the broadcast station data, the route from the current location to the set destination is prioritized to have a high rate that the route is within the receivable area. Select as one of the selection conditions.

  For example, if a weight is given to each link in the route (a road side delimited by an intersection, etc.) and the route having the largest sum of the weights is selected, the link is the receivable area of the broadcasting station. The weight of the link may be smaller when the link does not fall within the receivable area of the broadcast station than when the link is within.

  Further, for example, a route that is within the receivable area of any of the wireless transmission base stations used by the broadcast station from the current location to the destination may be selected with the highest priority.

  In addition, even when selecting the high rate that the route is in the receivable area as one of the priority selection conditions, the route that is in the receivable area is high for the route on the expressway. The priority selection condition may not be one.

  Subsequently, at step 150, route selection is performed without considering the reception area of the traffic information providing broadcast station. For example, the shortest route from the current location to the destination, the fastest route considering the average speed of each road, and the like are selected. Further, for example, the above-described weights may be the same even when the link is within the receivable area of the broadcast station or when the link does not enter the receivable area of the broadcast station.

  Subsequently, in step 160, two routes are displayed on the image display device 13 as guidance candidates. At this time, the user may be prompted to select one of them using the operation switch group 12 by displaying a selection button on the image display device 13 or the like. If there is a user selection, the process proceeds to step 170.

  In step 170, it is determined whether or not there is a reception area display request. Specifically, whether or not there has been a display request is determined by whether or not there has been an operation for requesting display of the reception area of a specific broadcasting station using the operation switch group 12 by the user. If there is a display request, step 180 is subsequently executed, and if not, execution of the program 100 is terminated.

  In step 180, the communication area of the broadcast station requested in step 170 is displayed on the image display device 13 so as to overlap the map. The superimposing means superimposing so that the geographical position of the map matches the geographical position of the area. Furthermore, simultaneously with the display, the name of the broadcast station, the direction of the broadcast station on the map to the radio transmission base station, and the distance from the current position of the radio transmission base station are displayed.

  The name of the broadcast station is specified based on the corresponding entry of the broadcast station data. Regarding the display of the direction on the map to the radio transmission base station of the broadcast station, for example, the position of the radio transmission base station is identified from the corresponding entry of the broadcast station data, and the direction from the current position to the identified position Are displayed in accordance with the azimuth display format of the map display (for example, north is up, vehicle traveling direction is up, etc.).

  At this time, when a plurality of radio transmission base stations are included in the entry, the position of the radio transmission base station closest to the current position is used. Alternatively, the position of a radio transmission base station that has a receivable area on the currently displayed map may be used.

  For the display of the distance from the current position of the radio transmission base station, for example, the position of the radio transmission base station is identified from the corresponding entry of the broadcast station data, and the linear distance from the current position to the identified position is determined. Display.

  After step 180, execution of program 100 is terminated.

  FIG. 3 illustrates a map display screen 30 including the current location, which is displayed by the image display device 13 based on the processing of step 180 by the control circuit 19 described above. In the display screen 30 of this figure, the roads 31 to 33 on the map, the current location mark 34 on the road 31, and a thick solid line 35 indicating the receivable area boundary of the radio transmission base station used by the FM radio broadcasting station NSK Tokyo. It is shown. In the map, the hatched portion is outside the receivable area of the radio broadcast base station. In addition, the display screen 30 has a direction display unit 36, a distance display unit 37, and a media name display unit 38 in a small portion at the upper right. The direction display unit 36 displays the direction of the position of the base station, the distance display unit 37 displays the distance to the base station of the current position, and the media name display unit 38 displays the name of NSK Tokyo. It is displayed.

  FIG. 4 shows two guide route displays displayed by the image display device 13 based on the processing of step 160 of the control circuit 19 described above. The display screen 40 in FIG. 4 also has a direction display unit 36, a distance display unit 37, and a media name display unit 38 as additional displays for the display in which the receivable area is superimposed on the map, as in FIG. May be.

  In the map of FIG. 4, there is a current location mark 42 on the road 41, and the hatched portion with the receivable area boundary 43 as a boundary is outside the receivable area of the broadcasting station providing the traffic information. is there. On this map, a first guide route candidate 44 (route indicated by hatch 1) and a second guide route candidate 45 (route indicated by hatch 1) starting from the current location mark 42 are displayed. The first guide route candidate 44 is a route selected by the control circuit 19 in step 140 of the program 100 and passes only through the receivable area. The second guide route candidate 45 is the route receivable area selected by the control circuit 19 in step 150.

  Note that when the user touches the position of the first guide route candidate 44 or the second guide route candidate 45 using the touch panel of the operation switch group 12, the control circuit 19 determines the touched target route. You may come to guide.

When the control circuit 19 executes the program 100 as described above, the vehicle-mounted vehicle navigation device 1
If there is a broadcast station designated for reception by the user, based on the broadcast station data in the external storage medium 18, the receivable area of the broadcast station is displayed superimposed on a map, and the name of the broadcast station is displayed simultaneously with the display. The direction on the map of the broadcasting station to the radio transmission base station and the distance from the current position of the radio transmission base station are displayed.

  Since it is like this, the area that can be received, the direction on the map to the radio transmission base station, the distance from the current position to the radio transmission base station, and the broadcast station name are displayed on the map, so which user can It is possible to see where the radio transmission base station of the broadcasting station is and what the coverage area is. Therefore, the possibility that the vehicle-mounted vehicle navigation device 1 goes out of the receivable area of the wireless transmission broadcasting station can be reduced.

  In addition, a broadcast station that can be reliably received by the user can be selected.

  In addition, if the user knows that he / she is out of the receivable area, he / she can refrain from communication at that position, so that the charge amount can be suppressed in a system where the charge is based on the received amount.

  Further, since the vehicle-mounted vehicle navigation device 1 directs the directivity of the reception antenna 17 from the current position toward the radio transmission base station, the reception level from the radio transmission base station is deteriorated. Even in this case, it is possible to reduce the deterioration of the reception state.

  The vehicle-mounted vehicle navigation device 1 can receive the route from the current location to the set destination based on the information on the receivable area of the broadcast station that provides traffic information in the broadcast station data. Select a high rate in the area as one of the priority selection conditions, and select the shortest route, such as the route from the current location to the set destination, the route is in the receivable area A high rate is selected without being one of the priority selection conditions, and the two selected routes are displayed on the image display device in a format that prompts the user to select as guide route candidates to the destination. .

  As a result, a route having a high rate in the receivable area of the broadcasting station is preferentially selected and displayed as a guidance candidate, so the time that the vehicle is in the receivable area becomes longer. The risk that the vehicular navigation device goes out of the receivable area of the wireless transmission broadcasting station can be reduced.

  In addition, since the broadcast station to be considered for the receivable area is a traffic information providing broadcast station, it is possible to more reliably receive the changing road traffic state.

  In addition, a route that is not preferentially selected as a route with a high rate in the coverage area of the broadcasting station is also displayed as a guide route candidate, so that the options for the user are expanded.

  In the embodiment described above, the control circuit 19 functions as display control means by executing Step 160 and Step 180 of the program 100.

  In addition, the control circuit 19 executes step 115 of the program 100 to function as an antenna control unit.

  Moreover, the control circuit 19 functions as a first route selection unit and a route selection unit by executing step 140 of the program 100.

  In addition, the control circuit 19 executes step 150 of the program 100, thereby functioning as a second path selection unit.

  In the receiving antenna 17 of the above-described embodiment, the antenna for the same frequency band is attached to the front end, the rear end, the right side surface, and the left side surface of the vehicle, and each operation and non-operation can be controlled independently. Accordingly, the receiving antenna 17 has a directivity as a whole. However, the receiving antenna 17 does not always have to have such a directivity method. For example, the receiving antenna 17 may be realized by an antenna whose direction can be mechanically changed by controlling the external storage medium 18. Good.

  Moreover, in this embodiment, although the vehicle-mounted vehicle navigation device 1 is configured to receive a radio signal from a broadcasting station, it is not necessarily required to be able to receive it. For example, even if the in-vehicle vehicle navigation device 1 does not have a reception function, if a radio receiver and a TV receiver different from the in-vehicle vehicle navigation device 1 are mounted in the vehicle, the broadcasting station It is useful for the vehicle-mounted vehicle navigation device 1 to display the receivable area, the name of the wireless transmission base station, the distance from the current position, and the direction.

It is a figure which shows the hardware constitutions of the vehicle-mounted vehicle navigation apparatus 1 which concerns on embodiment of this invention. 3 is a flowchart of a program 100 executed by a control circuit 19; It is the display screen 30 by the image display apparatus 13. FIG. This is a display screen 40 by the image display device 13. 3 is a diagram illustrating an example of a receivable area of a base station 61. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle-mounted vehicle navigation apparatus, 11 ... Position detector, 12 ... Operation switch group,
13 ... Image display device, 14 ... Audio amplifier, 15 ... Speaker, 16 ... Receiving device,
17 ... receiving antenna, 18 ... external storage medium, 19 ... control circuit, 30 ... display screen,
31-33 ... Road, 34 ... Current location mark, 35 ... Receivable area boundary,
36 ... direction display part, 37 ... distance display part, 38 ... media name display part, 40 ... display screen,
41 ... Road, 42 ... Current location mark, 43 ... Receivable area boundary,
44 ... 1st guide route candidate, 45 ... 2nd guide route candidate, 61 ... Base station,
100 ... Program.

Claims (6)

For each of a plurality of wireless broadcast stations, the broadcast station name, broadcast station data indicating information on the receivable area of the broadcast station, and a storage medium for storing map data;
Display control means for displaying on the image display device, the name of the broadcasting station related to the broadcasting station data in the storage medium and the receivable area of the broadcasting station are superimposed on a map based on the map data in the storage medium; A vehicle navigation apparatus comprising: For each of a plurality of radio broadcast stations, a storage medium for storing broadcast station data indicating the position of the radio transmission base station of the broadcast station and information on the receivable area of the broadcast station, and map data;
The map based on the map data in the storage medium is overlapped with the direction on the map to the radio transmission base station of the broadcast station related to the broadcast station data in the storage medium, and the receivable area of the broadcast station, A vehicle navigation device comprising: display control means for displaying on a display device. A storage medium for storing, for each of the plurality of wireless broadcast stations, broadcast station data indicating the broadcast station name, the position of the wireless transmission base station of the broadcast station, and information on the receivable area of the broadcast station, and map data; ,
On the map based on the map data in the storage medium, the name of the broadcast station related to the broadcast station data in the storage medium, the direction on the map to the radio transmission base station of the broadcast station, and the reception of the broadcast station A vehicle navigation apparatus, comprising: a display control unit configured to overlap an area and display on an image display device. A receiving antenna having directivity;
4. An antenna control means for directing the directivity of the receiving antenna toward a radio transmission base station of a broadcasting station related to broadcasting station data in the storage medium. The navigation apparatus for vehicles as described in one. For each of a plurality of radio transmission broadcast stations, broadcast station data indicating information on the receivable area of the broadcast station, and a storage medium for storing map data;
Based on the map data in the storage medium and the information on the receivable area of the broadcasting station, the priority selection condition is that the route from the current location to the set destination is a high rate that the route is in the receivable area. A first route selection means for selecting one;
Secondly, based on the map data in the storage medium, a route from the current location to the set destination is selected without setting one of the priority selection conditions that the route is within the receivable area. Route selection means;
A vehicle navigation apparatus comprising: display control means for causing the image display device to display both of the routes selected by the first and second route selecting means as guide route candidates to the destination. For each of a plurality of radio transmission broadcast stations, broadcast station data indicating information on the receivable area of the broadcast station, and a storage medium for storing map data;
Based on the map data in the storage medium and the information on the receivable area of the broadcasting station, the priority selection condition is that the route from the current location to the set destination is a high rate that the route is in the receivable area. As one, route selection means to select,
Display control means for displaying the route selected by the route selection means on the image display device as a guide route candidate to the destination,
The vehicle navigation apparatus according to claim 1, wherein the route selection unit does not set one of the priority selection conditions that the rate on the highway is within the receivable area.

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