JP2001304875A - Information processing device for mobile body and information processing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing device for a mobile unit capable of dealing with a large amount of data without equipping itself with a storage device of large capacity and capable of reducing the cost of the storage device itself, and to provide an information processing method therefor. SOLUTION: With respect to map information around the position of the mobile unit, a first set of data taken from a CD-ROM is stored in a memory part 107 and a second set of data received by radio from a database server 204 is stored in a received data storing part 108. A first display data generating part 102 generates a first set of display data of an area N from the first set of data read out from the memory part 107 while a second display data generating part 103 generates a second set of display data of a block bN from the second set of data read out from the storing part 108. The first and second sets of display data are overlaid to be displayed. Thus, the information processing device receives necessary map information by radio from a database connected to a network, it can deal with a wide range of map information without equipping itself with a storage device of large capacity, and it can reduce the cost of the storage device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile information processing apparatus and information processing method, and more particularly, to a mobile information processing apparatus having a function of connecting to a wireless communication line, and displaying the vicinity of a self-location based on map information and GPS information. The present invention relates to a mobile information processing apparatus and an information processing method thereof.

[0002]

2. Description of the Related Art A GPS navigation device is an example of a mobile information processing device having a function of connecting to a wireless communication line.
Data such as map information read from the D-ROM is stored in advance in a storage device such as a hard disk built in the device,
Data was read from the storage device as needed and used.

Further, the conventional GPS navigation device displays various types of information from road information to detailed information in the read map information at a single display resolution.

[0004]

However, the conventional GPS navigation device requires a large-capacity storage device to cope with a wide range of map information, which increases the cost, and usually requires a large amount of data. Even though the storage device is not used, it must be downloaded and stored in the storage device in advance, so that there is a problem that the input operation of the user becomes complicated.

Further, in the conventional GPS navigation device, when the display resolution of the detailed information to be displayed is increased, the display resolution of the road information must also be increased. Therefore, when displaying not only the detailed information but also the road information, a larger amount of information is required. Data processing has to be performed, and there is a problem that the processing load becomes heavy.

An object of the present invention is to provide a mobile information processing apparatus and a data processing method capable of handling a large amount of data without providing a large-capacity storage device and reducing the cost of the storage device itself. With the goal.

[0007]

According to a first aspect of the present invention, there is provided a mobile information processing apparatus comprising: a wireless communication means for performing data communication from a storage device connected to a network via a wireless communication; A first storage unit for storing first data read from a recording medium, a second storage unit for storing second data received by the wireless communication unit, and a second storage unit for storing the first data from the first storage unit. A first display data generating means for reading out one data to generate first display data; and a second display for reading out the second data from the second storage means to generate second display data. It is characterized by comprising a data generating means and a display means for combining and displaying the first display data and the second display data.

According to a second aspect of the present invention, there is provided a mobile information processing apparatus.
2. The mobile information processing apparatus according to claim 1, wherein each of the first data and the second data is map information around a self-position of the mobile, and the first display data is the map. It is a wide area of information, and the second display data is a narrow area within the wide area.

According to a third aspect of the present invention, there is provided a mobile information processing apparatus,
The mobile information processing apparatus according to claim 1 or 2,
Position detecting means for detecting the own position of the moving body, wherein the display means synthesizes and displays the first display data and the second display data corresponding to the detected own position. It is characterized by.

According to a fourth aspect of the present invention, there is provided a mobile information processing apparatus.
4. The information processing apparatus for a mobile body according to claim 1, wherein the display unit displays the first display data or the second display data according to the movement of the own position. 5. Switching is characterized.

According to a fifth aspect of the present invention, there is provided a mobile information processing apparatus,
5. The information processing apparatus for a mobile object according to claim 1, wherein the second display data generation unit sets a display switching time of the first display data or the second display data in advance. 6. It is characterized by predicting.

[0012] According to a sixth aspect of the present invention, there is provided a mobile information processing apparatus.
6. The mobile information processing apparatus according to claim 5, wherein the second display data generating unit is configured so that the second storage unit stores the second data after the wireless communication unit receives the second data. Calculating the timing of switching the display by comparing a time T1 until the display area is stored with a time T2 until the predetermined area around the own position approaches the end of the display area of the second display data. I do.

According to a seventh aspect of the present invention, there is provided a mobile information processing apparatus, comprising:
7. The mobile information processing apparatus according to claim 6, wherein the time T2 is calculated based on a moving speed of the own position and a distance to an end of the display area.

[0014] The mobile information processing apparatus according to claim 8 is
8. The mobile information processing apparatus according to claim 5, wherein the first display data generation unit predicts the display switching timing in advance and reads the first data. And

According to a ninth aspect of the present invention, there is provided a mobile information processing apparatus, comprising:
9. The mobile information processing apparatus according to claim 1, wherein the first display data generation unit sets the resolution of the first display data lower than the resolution of the second display data. The display means combines the first display data and the second display data into the same display size and displays them.

According to a tenth aspect of the present invention, in the mobile information processing apparatus according to any one of the third to ninth aspects, the position detecting means is a positioning system using an artificial satellite. The self-position is detected by GPS.

A mobile information processing apparatus according to claim 11 is the mobile information processing apparatus according to any one of claims 1 to 10, wherein the first storage means and the second storage means are provided. Is characterized by being integral.

According to another aspect of the present invention, there is provided a mobile information processing apparatus comprising: a wireless communication step of performing data communication from a storage device connected to a network via a wireless communication; A first storing step of storing first data, and a second storing step of receiving the first data.
A second storage step of storing the first data, a first display data generation step of reading out the first data from the first storage step to generate first display data, and a second storage step A second display data generating step of reading out the second data from the CPU to generate second display data, and a display step of combining and displaying the first display data and the second display data. It is characterized by the following.

According to a thirteenth aspect of the present invention, in the mobile information processing method according to the twelfth aspect,
Each of the first data and the second data is map information around the self-position of the mobile object, the first display data is a wide area of the map information,
Is characterized in that the display data is a narrow area within the wide area.

According to a fourteenth aspect of the present invention, in the information processing method for a mobile object, the information processing method for a mobile object according to the twelfth or thirteenth aspect further comprises a position detecting step of detecting a position of the mobile object. The first display data and the second display data are combined and displayed according to the detected own position.

According to a fifteenth aspect of the present invention, in the information processing method for a mobile object according to any one of the twelfth to twelfth aspects, the display step includes the step of: The display of the first display data or the second display data is switched.

According to a sixteenth aspect of the present invention, in the information processing method for a mobile object according to any one of the twelfth to fifteenth aspects, the second display data generating step includes the first display data generating step. The display switching timing of the display data or the second display data is predicted in advance.

According to a seventeenth aspect of the present invention, in the mobile information processing method according to the sixteenth aspect,
The second display data generation step includes: a time T1 from when the second data is received in the wireless communication step until the second data is stored in the second storage step; The timing for switching the display is calculated by comparing with a time T2 until the predetermined area reaches the end of the display area of the second display data.

The information processing method for a moving object according to claim 18 is the method according to claim 17, wherein
The time T2 is calculated based on a moving speed of the self-position and a distance to an end of the display area.

According to a nineteenth aspect of the present invention, in the information processing method for a moving body according to any one of the sixteenth to eighteenth aspects, the first display data generating step includes the step of switching the display. The timing is predicted in advance, and the first data is read.

According to a twentieth aspect of the present invention, in the information processing method for a moving body according to any one of the twelfth to nineteenth aspects, the first display data generating step includes the step of generating the first display data. The resolution of the display data is lower than the resolution of the second display data, and the first display data and the second display data are combined and displayed in the same display size in the display step.

According to a twenty-first aspect of the present invention, in the information processing method for a mobile object, the information processing method for a mobile object according to any one of the fourteenth to twentieth aspects is characterized in that the positioning system uses an artificial satellite in the position detecting step. The self-position is detected by a certain GPS.

According to a twenty-second aspect of the present invention, there is provided the information processing method for a moving object according to any one of the twelfth to twenty-first aspects, wherein the first storing step and the second storing step are performed. Are integrated.

[0029]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an overall configuration of a mobile information processing apparatus according to an embodiment of the present invention. This information processing device includes a GPS navigation device 100.

In FIG. 1, the GPS navigation device 100 includes an overall control unit 101, a first display data generation unit 102, a second display data generation unit 103, an operation unit 104, a display control unit 105, A display unit 106 for displaying map information, and a memory unit 1 for storing various processing data
07 and a received data storage unit 108 for storing received data
And a CD-R for reading data from a CD-ROM
OM control unit 109 and a first for attaching an external device
Connection port 110 and second connection port 111, a wireless communication control unit 112 for performing wireless communication,
A GPS control unit 113 for calculating the current position (own position) of 00 and antennas 114 and 115 are provided.

The overall control unit 101 is connected to the operation unit 104, the first display data generation unit 102, and the like via a bus.
0 controls the overall operation. First display data generator 10
2 is connected to the memory unit 107 and the display control unit 105 via a bus, reads out CD-ROM data previously transferred to the memory unit 107 via the CD-ROM control unit 109, and maps the data based on the data. Data is generated, and the generated map data is transmitted to the display control unit 105. The second display data generation unit 103 is connected to the reception data storage unit 108 and the display control unit 105 via a bus, reads data stored in the reception data storage unit 108, and generates map data based on the data. Then, the generated map data is transmitted to the display control unit 105.

The display control unit 105 is connected to the display unit 106 and displays a map data display area received from the first display data generation unit 102 and a map data display area received from the second display data generation unit 103. Are combined (overlayed) to generate display data and transmitted to the display unit 106. The display unit 106 includes a liquid crystal display or the like, and displays the display data received from the display control unit 105.
The memory unit 107 is a cache memory that temporarily stores data read via the CD-ROM control unit 109, and receives the first display data generation unit 102 based on a read request from the first display data generation unit 102. In addition, the data is used as a work memory of the overall control unit 101.

The received data storage unit 108 is connected to the wireless communication control unit 112 via the first connection port 110,
The received data received by the wireless communication control unit 112 via the antenna 114 is temporarily stored, and the stored data is transmitted to the second display data generation unit 103 based on a read request from the second display data generation unit 103. I do. Also,
The reception data storage unit 108 is also connected to the GPS control unit 113 via the second connection port 111,
5, the received data received by the GPS control unit 113 is also temporarily stored.

The CD-ROM control unit 109 controls a CD-ROM on which map information data is recorded in accordance with an instruction from the overall control unit 101.
The necessary data is read from the ROM and transmitted to the memory unit 107. The wireless communication control unit 112 has a wireless communication function used in a mobile phone or the like, performs data transmission of its own position of the device 100, requests transmission of map information data, and receives data, and receives the received data via the antenna 114. The received data is transmitted to the received data storage unit 108 via the first connection port 110.

The GPS control unit 113 has a function of calculating the current position of the apparatus 100, and a GPS satellite 20 described later.
2 receives the positioning data via the antenna 115 and transmits the data to the reception data storage unit 108 via the second connection port 111. GPS control unit 1
13 is a C transmitted from a plurality of GPS satellites 202
/ A code is received, and the GPS control unit 113 and the GP
The distance to the S satellite 202 is calculated, and the own position is accurately calculated using a triangulation method. The details of such a calculation method are well-known, and thus description thereof is omitted here.

The GPS control unit 113 transmits the calculated data of the own position to the general control unit 10 via the second connection port 111.
1 and the overall control unit 101 displays its own position and display range based on the received data in the display control unit 105, the first display data generation unit 102, and the second display data generation unit 1.
03 respectively.

FIG. 2 is a schematic diagram of the entire GPS navigation system corresponding to the GPS navigation device 100 of FIG.

In FIG. 2, the present system provides a mobile station 201 such as an automobile (mobile body) equipped with a GPS navigation device 100, a GPS satellite 202, a radio base station 203 such as a mobile phone, and map information data. And a public line 205 (network) connected to the wireless base station 203 and the database server 204.

The GPS navigation device 100 mounted on the mobile station 201 receives the positioning data from the GPS satellite 202, calculates the own position of the mobile station 201, and connects to the public line 205 via the radio base station 203. It communicates with the database server 204 and receives the map information data around its own position.

The database server 204 stores the latest map information data, and based on the data of the own position transmitted from the GPS navigation apparatus 100 to the server 204 via the wireless communication control unit 112, detailed map information around the own position. And various information attached thereto are transmitted to the device 100. The various types of information attached to the map information include the corresponding nearby stores, telephone numbers, tourist information, and the appearance of the building.

The map information data recorded on the CD-ROM described above relates to major arterial roads nationwide.
Detailed map information such as a living road around the main road is not included. On the other hand, the map information data recorded in the database server 204 is detailed map information such as a living road around a main road, which is not recorded in the CD-ROM, and various kinds of information attached thereto. In other words, detailed map information and the like around the main road will be stored in the database server 204 having a larger storage capacity than a CD-ROM having a small storage capacity, since a huge amount of data will be required if a national area is prepared. Can be applied to a nationwide area without using a plurality of CD-ROMs.

The GPS navigation device 100 notifies the database server 204 of the data of its own position, and based on the received data, the database server 204 transmits detailed map information data around its own position to the device 100. 100 overlays and displays the map information data read from the CD-ROM and the detailed map information data received from the database server 204.

Although only one GPS satellite 202 is shown in FIG. 2, there are a plurality of GPS satellites in an actual system, and the GPS navigation device 100 transmits the positioning data from the GPS satellite 202 as described above. Receives and calculates own position using triangulation method. Also,
Although only one wireless base station 203 is shown, there is actually a plurality of wireless base stations 203, and it is assumed that the connection is sequentially switched to the destination base station even when the mobile station 201 moves.

FIG. 3 is a schematic diagram showing the relationship between the area of the map information read from the CD-ROM and the area of the detailed map information received from the database server 204.

In FIG. 3, a square portion surrounded by a solid line indicates an area of map information read from a CD-ROM, and is a wide area of, for example, 10 km square. This area is called an area, and each area is called ar.
eaN (N = 1, 2, 3,...).

A square portion surrounded by a dotted line indicates an area of the detailed map information received from the database server 204, and is, for example, a narrow area of 2 km square. This area is called a block, and each block is represented by bN (N = 1, 2, 3,...).

A road 301 indicates a route road on which the mobile station 201 has moved from the start point to the end point.
(Area1, b1), (area1, b2), (ar
ea1, b3), ..., (area5, b24), (ar
ea5, b25).

Next, a method of switching the display of map information of the GPS navigation device 100 with the movement of the mobile station 201 will be described with reference to FIG.

In FIG. 3, mobile station 201 has area ar
When the user is at the start point of ea1, the GPS navigation device 100 stores the map information corresponding to the area area1 on the CD.
-Reading the area data of the area to be displayed on the display unit 106 from the data of the area area1 transferred from the ROM to the memory unit 107 and transferred to the memory unit 107 by the first display data generation unit 102, and converting the area data to the display data And transmits it to the display control unit 105.

Similarly, at the start point, the GPS navigation device 100 transfers the detailed map information corresponding to the block b1 from the database server 204 to the received data storage unit 108 via the wireless communication control unit 112, and displays the second display. Received data storage unit 108 by data generation unit 103
From the data of the area of the block b1 transferred to the display unit 1
In step 06, the block data of the area to be displayed is read out, the block data is expanded into display data, and the display control unit 105
Send to

The display control unit 105 overlays the display data transmitted from the first display data generation unit 102 and the display data transmitted from the second display data generation unit 103 and displays the data on the display unit 106.

Next, the mobile station 201 moves from the starting point to the road 301.
When you move along and reach block b2,
The detailed map information corresponding to the block b2 is transferred from the database server 204 to the reception data storage unit 108 via the wireless communication control unit 112, and the second display data generation unit 1
At step 03, the block data of the area to be displayed on the display unit 106 is read from the data of the area of the block b2 transferred to the reception data storage unit 108, and the block data is expanded to display data and transmitted to the display control unit 105. At this time, since the destination of the mobile station 201 is in the same area, GP
In the S-navigation device 100, the first display data generation unit 102 reads out area data for displaying the area from the memory unit 107. When the destination of the mobile station 201 is in the same block, the second display data generation unit 103 reads out block data for displaying the block from the reception data storage unit 108.

When the mobile station 201 moves further from the block b2 and reaches an arbitrary block bM (M = 3, 4, 5,...), Detailed map information corresponding to the block bM is displayed as described above. The data is transferred from the database server 204 to the reception data storage unit 108 via the wireless communication control unit 112 to the reception data storage unit 108, and the data of the block bM area transferred to the reception data storage unit 108 by the second display data generation unit 103 is displayed on the display unit 106. The block data of the area to be displayed is read, the block data is expanded into display data, and transmitted to the display control unit 105. In this way, the GPS navigation device 100 repeats the above-described operation each time it moves each block in the same area.

Next, the mobile station 201 moves to the area ar
When approaching the block b6 of the ea2, not only the detailed map information corresponding to the block b6 is transferred from the data server 204 to the reception data storage unit 108, but also the CD
-Transfer map information corresponding to the area area2 from the ROM to the memory unit 107. First display data generator 10
2 reads out the area data of the area to be displayed on the display unit 106 from the data of the area area2 transferred to the memory unit 107, expands the area data into display data, and transmits the display data to the display control unit 105.

The display control unit 105 includes the first display data generation unit 102 and the second display data generation unit 1 in the same manner as described above.
Each display data transmitted from the display unit 03 is overlaid and displayed on the display unit 106, and the display screen is switched.

When the mobile station 201 approaches the block b12 of the area area3, the map information corresponding to the area area3 which is the area next to the area area2 is transferred from the CD-ROM to the memory unit 107, and the first display data generation is performed. The area data of the area to be displayed on the display unit 106 is read from the data of the area area 3 transferred to the memory unit 107 by the unit 102, the area data is expanded into display data, and transmitted to the display control unit 105.

When the mobile station 201 approaches the block b18 of the area area4, the map information corresponding to the area area4 is transferred from the CD-ROM to the memory unit 107, and the data is displayed by the first display data generation unit 102. The data is expanded to data and transmitted to the display control unit 105. When the mobile station 201 approaches the block b23 of the area area5, the map information corresponding to the area area5 is transferred from the CD-ROM to the memory unit 107, and the data is expanded into display data by the first display data generation unit 102. And sends it to the display control unit 106.

The first display data generation unit 102 and the second display data generation unit 103 operate independently and in parallel, and the first display data generation unit 102 and the second display data generation Display control unit 105 by unit 103
The display data is transmitted to the mobile station 201 every time the area displayed on the display unit 106 moves.

Next, the determination of the edge of the area of the first display data generation unit 102 in accordance with the movement of the mobile station 201 will be described with reference to FIG.

FIG. 4 shows the first display data generator 1 of FIG.
12 is a flowchart illustrating a process of determining an area end in a case 02.

In FIG. 4, the first display data generation unit 1
02, the information of the own position calculated based on the GPS information from the GPS satellite 202 is received from the overall control unit 101, and the display area around the own position to be displayed on the display unit 106 according to the information is stored in the current memory unit 107. It is determined whether or not the area is the area end of the area areaN (step S
401). As a result of this determination, if the display area around the own position is not at the edge of the area (NO in step S401), the process proceeds to step S404. If it is at the edge of the area (YES in step S401), a request to read the next area data is issued. A notification is sent to the overall control unit 101 (step S402).
Upon receiving this notification, the overall control unit 101 stores the map information data corresponding to the next area from the CD-ROM into the memory unit 1.
07, and notifies the first display data generator 102 of the completion of the data transfer (step S403).

In step S404, when the first display data generation unit 102 receives the transfer completion notification of the map information data, the first display data generation unit 102
The area data of the area to be displayed is read out in step 6, and the peripheral area image at the own position is developed into display data. Next, the developed display data is transmitted to the display control unit 105 (step S4).
05), returning to step S401 to repeat the processing. This makes it possible to switch the display screen appropriately.

Next, the determination of the block edge of the second display data generation unit 103 in accordance with the movement of the mobile station 201 will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 5 shows the second display data generator 1 of FIG.
It is the schematic which shows the determination of the block end of 03.

In FIG. 5, the mobile station 201 is moving at a vehicle speed V from a current position P0 toward a direction P1 on a road 603 indicated by a solid line in a block bN on the map. Square portions surrounded by dotted lines around P0 and P1 are display areas 601 and 60 displayed by the display unit 106.
These display areas are displayed around the mobile station 201, and are linked to the movement of the mobile station 201.
01 and 602 also move.

P1 is the display area 60 at the end of the block bN.
2 indicates the position of the mobile station 201 when it has reached 2. Whether the mobile station 201 has reached this position,
The mobile station 201 determines whether the end of the display area 602 centered on the end of the block bN has reached its current position P.
This is performed by estimating the time T from 0 to P1.

Assuming that the distance on the road 603 between P0 and P1 is L and the speed of the mobile station 201 at P0 is V, the time T required for the mobile station 201 to reach P1 is calculated by T = L / V. Can be. That is, whether or not the end of the display area 602 centered on the mobile station 201 has reached the end of the block bN is determined by determining whether or not T time has elapsed from the current position P0.

Next, the determination of the block end of the second display data generation unit 103 will be described in detail with reference to FIG.

FIG. 6 shows the second display data generator 1 of FIG.
13 is a flowchart showing a block end determination process in 03.

In FIG. 6, first, the second display data generation unit 103 performs initialization for substituting 0 into a time T1 indicating a transfer time required to transfer the block data to the display control unit 105 (step S1). S601). This initialization is executed only once at the beginning of this processing. Next, the information of the own position calculated based on the GPS information from the GPS satellite 202 is received from the overall control unit 101, and the distance L until the display area displayed on the display unit 106 reaches the block end is calculated according to the information. (Step S602).

Next, a predicted time T2 until the display area reaches the block end is calculated from the calculated distance L and the current moving speed V of the mobile station 201 (step S603), and a preset fixed value d is calculated. Then, the values of the time T1 and T2 + d are compared and discriminated (step S604). In this processing, the fixed value d is a time required for processing in steps S610 and 611 described later, and the second display data generation unit 10
3 is set in advance according to the ability of the third party.

As a result of the determination in step S604, T1 ≦ T
If it is not 2 + d (NO in step S604), the process proceeds to step S610. If T1 ≦ T2 + d (YES in step S604), the timer is started (step S605), and the next block of the destination block is stored in the reception data storage unit 108. It is determined whether or not data has been stored (step S606). As a result of this determination, when the next block data is stored (Y in step S606)
ES), the process proceeds to step S610, and if the next block data is not stored (N in step S606)
O), a request to transmit the next block data is sent to the overall control unit 10
Notify 1. Upon receiving this notification, the overall control unit 101
The database server 20 via the wireless communication control unit 112
Then, a request to transmit the next block data is transmitted to No. 4 (step S607).

When receiving the next block data from the database server 204, the wireless communication control unit 112 transfers the received next block data to the received data storage unit 108 (step S608). When the reception of the next block data is completed, the timer is stopped, and the measured timer value is substituted for T1 (step S609).

In step S610, block data of an area to be displayed on display section 106 is read from received data storage section 108, and a peripheral area image at the own position is developed into display data (step S610). Next, the developed display data is transmitted to the display control unit 105 (step S611),
Returning to step S602, the process is repeated.

Next, display processing of display data in the display control unit 105 will be described with reference to FIG.

FIG. 7 is a schematic diagram showing a display data display process in the display control unit 105 of FIG.

The display control unit 105 includes field memories 1, 2, 3 corresponding to three drawing surfaces inside.
The display data transferred from the first display data generation unit 102 is written in the field memory 1, which is the first drawing plane. The display data transferred from the second display data generation unit 103 is written in the field memory 2 which is the second drawing plane. The display data transferred from the overall control unit 101 is written in the field memory 3 which is the third drawing plane. The display data transferred from the overall control unit 101 includes the coordinates of the own position of the mobile station 201, a mark registered in advance, and the like.

As described above, the field memories 1, 2, 3
Are superimposed on the display data written on the display unit to form a single display screen, which is transmitted to the display unit 106 for display.

In FIG. 7, an area area M701
Is an area areaM where the mobile station 201 is currently located in the field memory 1 provided in the first display data generation unit 102.
(M = 1, 2, 3,...) Are developed. The data developed in the field memory 1 of the first display data generation unit 102 is map information data corresponding to the area area 701 read from the CD-ROM, and includes map information of main arterial roads.

Area M7 of field memory 1
01 is composed of a display resolution of 10240 × 10240 pixels, divided into 5 blocks in the vertical direction in the north-south direction and the horizontal direction in the east-west direction, and divided into regions corresponding to 25 blocks. It consists of 2048 pixels.

Mobile station 201 in area area 701
Is a block bN702. The display area 703 in this block bN702 is
6 is an area to be displayed, and has a display resolution of 512 × 384 pixels, which is lower than that of the second display data generation unit 103 described later.

The first display data generator 102 transfers the current display area 703 centered on the mobile station 201 to the field memory 1 in the display controller 105. 1024 × 76 in which the pixel configuration of the display area 703 transferred to the display control unit 105 is doubled in the vertical direction and the horizontal direction, respectively.
The image is enlarged to 8 pixels and is displayed by overlaying it with other display data.

On the other hand, a block bN ′ 704 is obtained by expanding the map information data of the block bN ′ where the mobile station 201 is currently located in the field memory 2 provided in the second display data generation unit 103, and has a size of 4096 × 4096 pixels. It consists of. The data developed in the field memory 2 of the second display data generation unit 103 is stored in the reception data storage unit 10.
8 is the map information data corresponding to the block bN ′ 704 read from No. 8, which is the same area as the block bN 702 described above, but includes detailed map information excluding the main highway.

Display area 705 in block bN ′ 704
Is a display unit 106 composed of 1024 × 768 pixels.
Is an area to be displayed. Second display data generation unit 103
Is transferred from the display area 705 centered on the current mobile station 201 to the above-described field memory 2 in the display control unit 105.

The display unit 106 stores the field memory 1 which is the display data generated by the first display data generation unit 102.
A display image 706 is generated by overlaying the field memory 2 as display data generated by the second display data generator 103 and the data in the field memory 3 as display data written by the overall controller 101. indicate.

According to the present embodiment, the map information around the self-position of the moving object is stored as the first data from the CD-ROM in the memory unit 107, and the received data is stored from the database server 204 via radio. Second in part 108
Of the first display data generation unit 102
Generates the first display data of the area (areaN) from the first data read from the memory unit 107, and blocks the second display data generation unit 103 from the second data read from the reception data storage unit. (B
N), the second display data is generated, and the first and second display data are overlaid and displayed. Therefore, necessary map information is received from a database connected to a network via wireless communication, and the large-capacity data is stored by itself. Can be used for a wide range of map information without providing the storage device, and the cost of the storage device can be reduced. In addition, since there is no need to download and hold a large amount of data that is normally rarely used from the CD-ROM, the operation is simplified.

Further, the first display data generation unit 102
In addition to the determination of the rear N end, the second display data generation unit 103 performs the determination of the bN end and switches and displays the first and second display data, so that the data is transmitted from the database 204 connected to the network via wireless. Thus, necessary map information can be received in advance, and map information around the own position of the moving body 201 can be displayed without interruption.

Further, a display area 703 for the first display data is displayed.
Is lower than the display resolution of the display area 705 for the second display data, and the first and second display data having different display resolutions are displayed in an overlay manner.
The processing load related to the generation of map information display data can be reduced.

In this embodiment, a CD-ROM is used as a recording medium on which map information data is recorded.
VD-ROM, DVD-RAM, or hard disk,
A flash memory may be used. The memory unit 10
7, the received data storage unit 10 as an independent storage means.
However, when a hard disk or a flash memory which can be written to the memory unit 107 is used, the storage area in the memory unit 107 is divided into two parts instead of the reception data storage unit 108, and the reception data storage unit 108 may be abolished.

Further, in this embodiment, a positioning method using a GPS satellite is used as the position detecting means. However, any method may be used as long as it can detect its own position. For example, a plurality of radio base stations may be used. A method of performing position detection based on a variation in propagation delay from the position may be used.

[0092]

As described in detail above, according to the apparatus according to the first aspect and the method according to the twelfth aspect, of the first display data and the second display data to be combined,
Since the second data that constitutes the second display data is received from a storage device (database) connected to the network via wireless, necessary data is received from the storage device connected to the network, A large amount of data can be handled without providing a storage device with a large capacity, and the cost of the storage device itself can be reduced.

According to the apparatus of the second aspect and the method of the thirteenth aspect, each of the first data and the second data is map information around the own position of the moving object, and the first display data Is a wide area of the map information, and the second display data is a narrow area within the wide area, so that a large amount of map information data around the own position of the moving object is separately provided as necessary. be able to.

According to the apparatus of the third aspect and the method of the fourteenth aspect, the self-position of the moving body is detected, and the first display data and the second display data are corresponded to the detected self-position. Since the combined information is displayed, map information around the own position of the moving object can be accurately displayed.

According to the apparatus of the fourth aspect and the method of the fifteenth aspect, the display of the first display data or the second display data is switched according to the movement of the self-position of the moving body. The map information around the own position can be displayed without interruption.

According to the apparatus of the fifth aspect and the method of the sixteenth aspect, the display switching time of the first display data or the second display data is predicted in advance, so that the storage device (database connected to the network) ) Can be received in advance via wireless communication, and the map information around the own position of the moving object can be displayed without interruption.

According to the apparatus described in claim 6 and the method described in claim 17, a time T1 from when the second data is received to when the second data is stored, and a time T1 around the own position of the moving body. Is calculated by comparing it with the time T2 until the area of the second display data reaches the end of the display area of the second display data. Therefore, the display of the first display data or the second display data can be performed at a more appropriate timing. Can switch.

According to the apparatus described in claim 7 and the method described in claim 18, the time T2 is calculated based on the moving speed of the own position and the distance to the end of the display area, so that the first display data or the second display data is calculated. Display data can be quickly switched.

According to the apparatus described in claim 8 and the method described in claim 19, the first data is read by predicting the display switching time in advance, so that the necessary map information can be received from the recording medium without interruption. Can be displayed.

According to the apparatus of the ninth aspect and the method of the twentieth aspect, the resolution of the first display data is made lower than the resolution of the second display data, and
Of the first display data can be displayed even if the display resolution of the second display data is increased, and the display information of the map information can be displayed. The processing load related to data generation can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of a mobile information processing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an entire GPS navigation system corresponding to the GPS navigation device 100 of FIG.

FIG. 3 is a schematic diagram showing a relationship between an area of map information read from a CD-ROM and an area of detailed map information received from a database server 204;

FIG. 4 is a flowchart showing a process of determining an edge of an area in a first display data generation unit 102 in FIG. 1;

5 is a schematic diagram illustrating determination of a block end of a second display data generation unit 103 in FIG. 1;

FIG. 6 is a flowchart illustrating a process of determining a block edge in a second display data generation unit 103 in FIG. 1;

FIG. 7 is a schematic diagram showing a display process of display data in a display control unit 105 of FIG. 1;

[Explanation of symbols]

 Reference Signs List 100 GPS navigation device 101 Overall control unit 102 First display data generation unit 103 Second display data generation unit 104 Operation unit 105 Display control unit 106 Display unit 107 Memory unit 108 Received data storage unit 109 CD-ROM control unit 112 Wireless Communication control unit 113 GPS control unit

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Claims (22)

[Claims] 1. A wireless communication means for performing data communication from a storage device connected to a network via wireless, a first storage means for storing first data read from a recording medium, and the wireless communication means A second storage unit that stores the received second data, a first display data generation unit that reads the first data from the first storage unit to generate first display data, A second display data generating means for reading the second data from the second storage means to generate second display data; and a display for combining and displaying the first display data and the second display data. And a means for processing a moving object. 2. Each of the first data and the second data is map information around a self-position of the moving body,
2. The information of a moving body according to claim 1, wherein the first display data is a wide area of the map information, and the second display data is a narrow area within the wide area. Processing equipment. 3. A position detecting means for detecting a self-position of the moving body, wherein the display means combines the first display data and the second display data in accordance with the detected self-position. 3. The display according to claim 1, wherein
The mobile information processing apparatus according to any one of the preceding claims. 4. The display device according to claim 1, wherein the display unit switches the display of the first display data or the second display data in accordance with the movement of the own position. A mobile information processing apparatus according to claim 1. 5. The display apparatus according to claim 1, wherein the second display data generation unit predicts in advance a display switching time of the first display data or the second display data. An information processing apparatus for a mobile object according to the paragraph. 6. The second display data generation means includes a time T1 from when the wireless communication means receives the second data to when the second storage means stores the second data. 6. The moving body according to claim 5, wherein a timing of switching the display is calculated by comparing the time T2 until a predetermined area around the own position approaches the end of the display area of the second display data. Information processing device. 7. The information processing apparatus according to claim 6, wherein the time T2 is calculated based on a moving speed of the own position and a distance to an end of the display area. 8. The moving device according to claim 5, wherein the first display data generation unit reads the first data by predicting the display switching time in advance. Information processing device for the body. 9. The first display data generating means sets the resolution of the first display data lower than the resolution of the second display data, and the display means sets the first display data and the second display data The mobile information processing apparatus according to any one of claims 1 to 8, wherein the two display data are combined and displayed in the same display size. 10. The mobile object according to claim 3, wherein said position detecting means detects said own position by GPS which is a positioning system using an artificial satellite. Information processing device. 11. The apparatus according to claim 1, wherein said first storage means and said second storage means are integrated.
0. The mobile information processing apparatus according to any one of 0. 12. A wireless communication step of performing data communication from a storage device connected to a network via wireless, a first storage step of storing first data read from a recording medium, and a wireless communication step. A second storage step of storing the received second data, a first display data generation step of reading out the first data from the first storage step to generate first display data, A second display data generation step of reading the second data from the second storage step to generate second display data, and a display for combining and displaying the first display data and the second display data. And an information processing method for a moving object. 13. Each of the first data and the second data is map information around a self-position of the moving body, and the first display data is a wide area of the map information. 13. The information processing method according to claim 12, wherein the second display data is a narrow area within the wide area. 14. A position detecting step of detecting a self-position of the moving body, wherein the displaying step combines the first display data and the second display data in accordance with the detected self-position. 14. The information processing method for a moving object according to claim 12, wherein the information is displayed. 15. The display step according to claim 12, wherein the display step switches the display of the first display data or the second display data in accordance with the movement of the own position.
5. The information processing method for a moving object according to any one of 4. 16. The display control method according to claim 12, wherein the second display data generating step predicts a display switching time of the first display data or the second display data in advance.
16. The information processing method for a moving object according to any one of claims 15 to 15. 17. The method according to claim 17, wherein the second display data generating step includes a time period T1 from when the second data is received in the wireless communication step to when the second data is stored in the second storing step. 17. The moving body according to claim 16, wherein a timing for switching the display is calculated by comparing the time T2 until a predetermined area around the self-position approaches the end of the display area of the second display data. Information processing method. 18. The method according to claim 17, wherein the time T2 is calculated based on a moving speed of the self-position and a distance to an end of the display area. 19. The movement according to claim 16, wherein in the first display data generating step, the display switching timing is predicted in advance and the first data is read. Information processing method of the body. 20. The resolution of the first display data is set lower than the resolution of the second display data in the first display data generation step, and the first display data and the second display data are set in the display step. 20. The information processing method for a mobile object according to claim 12, wherein the display data is combined and displayed with the same display size. 21. The method according to claim 14, wherein in the position detecting step, the own position is detected by a GPS which is a positioning system using an artificial satellite.
Item 13. The information processing method for a moving object according to Item. 22. The method according to claim 12, wherein the first storage step and the second storage step are integrated.
2. The information processing method for a moving object according to any one of the above items 1.