JP2004053323A - Navigation system and navigation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain appropriate road guidance where display delay in an image accompanied by movement is considered in a navigation system that can transmit a camera image and receive the road guidance. <P>SOLUTION: Multiaccess communication processing is established to acquire information on a communication network to one's party and the type of one's party communication terminal equipment (S10-S50). Based on the communication network and the type of communication equipment, a display speed database 17g is searched for to obtain a display speed S, a vehicle speed V is acquired from a vehicle speed sensor 22, a zoom magnification Z is calculated from the vehicle speed V and display speed S, and the zoom magnification of a camera 21 is controlled based on the calculated result (S60-S90). Data for transmission where an image captured from the camera 21, map data around a current position, and a vehicle mark corresponding to the current position are combined are transmitted to a one's party communication terminal 9 with the voice of a user. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a navigation system.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a car navigation device obtains a current position based on information from a GPS, searches a map information database based on the current position, and displays a map around the current position on a display, thereby providing a user with an object. Equipped with a function to provide directions to the ground.
[0003]
In addition, the in-vehicle car navigation unit is provided with a multi-access function for communicating images and voices, and further includes a first camera for photographing the front of the vehicle and a second camera for photographing the driver's seat. There is also known a navigation system that transmits an image captured by a second camera and receives voice guidance from a communication station (Japanese Patent Laid-Open No. 11-205782). The navigation system described in this publication further has a function of controlling the zoom magnification of the camera according to the vehicle speed, and performing a control of increasing the zoom magnification as the speed increases.
[0004]
According to the car navigation system described in Japanese Patent Application Laid-Open No. H11-205782, an image ahead of the vehicle can be shared between the vehicle and the base station, and appropriate road guidance and the like can be performed. Further, since the zoom magnification of the camera is increased as the speed becomes higher, there is an effect that an image corresponding to the viewing angle of the driver can be obtained.
[0005]
[Problems to be solved by the invention]
However, the car navigation system described in Japanese Patent Application Laid-Open No. H11-205872 is good for transmitting the same powerful image as the driver to the base station, but has the following problems in obtaining route guidance.
[0006]
That is, since the data communication speed differs depending on the model of the communication terminal on the base station side and the type of communication network used, when the guidance is obtained from the other party, the vehicle must pass the intersection where it should turn right or left or stop. There is a possibility that the problem of passing the point may occur.
[0007]
Therefore, an object of the present invention is to provide more appropriate route guidance in a navigation system.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a map display control means for acquiring a current position, searching a map information database, and displaying a map around the current position on a display, a photographing means for photographing an image, A communication unit having a multi-access function capable of communicating at least image information and audio information, and establishing a state in which the communication unit can communicate image information and audio information with a destination communication terminal. Transmitting an image photographed by the photographing means to a destination communication terminal, and communicating at least the image information and the voice information with a transmitting device having a communication control means for receiving at least voice information from the destination communication terminal. Communication means having a multi-access function and an image display means for displaying received image information. In a navigation system including a receiving device, the communication control means of the transmitting device includes position information transmitting means for transmitting, in addition to the image information, positional information relating to a current position of the transmitting device, Are map display control means for displaying a map on a display based on the position information, position designation means for designating a position on the map displayed by the map display control means, and a position designated by the position designation means. Position data transmitting means for transmitting position data, wherein the map display control means of the transmitting device is configured as means for displaying a target point at a position corresponding to the position data transmitted from the position data transmitting means. It is characterized by having.
[0009]
According to the first aspect of the present invention, since not only the image but also the map is displayed on the receiving side for which the route guidance has been requested, the position of the partner (for example, the vehicle) for which the route guidance has been requested is displayed on the image. It can be specified from both the signboard and the state of the store and the map, and the position of the other party can be accurately known. For example, if it is only an image, (1) a mountain area with few features, (2) an area where there are multiple similar targets (signboards, gas stations, banks, convenience stores, etc.) Although the current position cannot be specified, if there is a map, the position can be specified from both the image and the map. Conversely, if you do not remember the exact number of intersections around you on the map alone, it may be difficult to specify how many intersections you want to turn, but not only from the map, but also from the image This is because, by finding the feature, it is possible to easily instruct “how many intersections should be turned ahead”.
[0010]
Here, the position information transmitting means can be configured as means for transmitting the latitude / longitude information for specifying the current position, or, if the current position is coded as a point code, the point code. Further, it may be configured as means for transmitting the map data itself around the current position. In this case, it is preferable to transmit the information together with a mark or the like for specifying the current position of the transmitting side in the map.
[0011]
On the other hand, according to the first aspect of the present invention, since the receiving-side device includes the position specifying means and the position data transmitting means, it is possible to transmit not only voice but also position data in performing the route guidance. The transmitting apparatus can display a target point on a map based on the position data transmitted from the receiving apparatus. Therefore, for example, in a case where the transmitting device is mounted on a vehicle and moving, when the voice guidance based on the image displayed on the receiving device is received, the target has already passed the target. Even in such a case, the intersection to be turned right or left can be accurately known by displaying the target point on the map. Therefore, the problem of the time lag based on the difference in the display speed depending on the type of the communication network or the communication device can be solved. The guidance side uses voice to indicate a target object before the target point, for example, "a third signal from there" or "a third intersection beyond a signboard of XX". However, in such a case, even if the vehicle has already passed the target, there is an effect that correct route guidance can be received based on the display of the target point on the map.
[0012]
Further, the invention according to claim 2 obtains a current position, searches a map information database, and displays a map around the current position on a display, a map display control means for photographing an image, at least image information and audio information. Communication means having a multi-access function capable of communicating with the communication means, and a state in which image information and voice information can be communicated with the communication terminal of the other party by the communication means; And a multi-access function capable of communicating at least the image information and the voice information with a transmitting device having communication control means for transmitting at least the voice information from the destination communication terminal while transmitting the image to the destination communication terminal. Having a communication device having a receiving side device as the destination communication terminal having an image display device for displaying received image information. A zoom magnification control for controlling a zoom magnification of the photographing means based on a display speed until an image transmitted from the transmitting terminal to the receiving terminal is displayed by an image display means of the receiving terminal. Means is provided.
[0013]
According to the second aspect of the present invention, it is possible to request the route guidance by transmitting the image photographed by the photographing means from the transmitting terminal. At this time, the transmitted image takes into account the time lag until the image is displayed on the receiving terminal by the zoom magnification control unit. Therefore, if the transmitting terminal is mounted on a mobile object and there is a time lag before the image is displayed on the receiving device, the zoom magnification is increased and the image ahead is transmitted, so that only the voice is transmitted. Even if there is, there is an effect that appropriate route guidance can be received.
[0014]
According to a third aspect of the present invention, in the navigation system according to the second aspect, the communication control unit includes a position information transmitting unit that transmits, in addition to the image information, position information relating to a current position of a transmitting side. The reception-side device includes a map display control unit that displays a map on a display based on the position information.
[0015]
According to the third aspect of the present invention, similarly to the first aspect of the present invention, the image and the map can be displayed on the receiving side terminal. It can be specified from both the signboard and the state of the store in the image and the map, and the position of the other party can be accurately known. Therefore, more appropriate route guidance is possible.
[0016]
According to a fourth aspect of the present invention, in the navigation system according to the second or third aspect, the receiving device further includes a position designation unit that designates a position on a map displayed by the map display control unit. And position data transmitting means for transmitting position data relating to the position designated by the position designating means, wherein the map display control means of the transmitting side device stores a position corresponding to the position data transmitted from the position data transmitting means. It is characterized by being configured as means for displaying a target point.
[0017]
According to the invention of claim 4, similarly to the invention of claim 1, not only the voice but also the display of the target point on the transmitting terminal can be executed together, so that the moving speed of the transmitting device is high, Even when the user has received the guidance, even if the vehicle has already passed the target, the display of the target point on the map has an effect that the intersection to be turned right or left can be accurately known.
[0018]
According to a fifth aspect of the present invention, in the navigation system according to any one of the second to fourth aspects, the zoom magnification control means includes a communication speed and a communication destination depending on the type of communication network up to the destination communication terminal. And a zoom magnification calculating means for calculating the zoom magnification based on the image processing speed of the constituent device.
[0019]
According to a sixth aspect of the present invention, in the navigation system according to the fifth aspect, the zoom magnification calculating means is based on a zoom magnification table storing a relationship between a type of a communication network, constituent devices of a communication terminal, and a zoom magnification. And a means for calculating the zoom magnification.
[0020]
According to the fifth and sixth aspects of the present invention, if the type of the communication network and the communication device employed by the destination terminal is determined, the type of communication network and the communication device are not limited to the specific communication network and the communication device. Of the present invention in which an image taking into account the time lag caused by the above is displayed on the receiving device to obtain accurate guide information. " The type of the communication network and the type of the communication device can be specified when the communication control unit establishes the multi-access communication with the other party.
[0021]
According to a seventh aspect of the present invention, in the navigation system according to any one of the second to sixth aspects, the navigation system further includes a speed detecting unit that detects a moving speed of the transmitting device, and the zoom magnification control unit includes the zoom magnification controlling unit. In controlling the magnification, a zoom magnification correcting means for correcting the zoom magnification of the photographing means so as to increase the zoom magnification as the moving speed increases, in consideration of the moving speed detected by the speed detecting means, is provided. Features.
[0022]
According to the seventh aspect of the present invention, in addition to the time lag due to the delay of the display speed, it is possible to capture an image at a zoom magnification corrected for the speed at which the transmitting device moves and transmit the image. For example, when the transmitting device is mounted on a moving vehicle, in addition to the delay of the display speed due to the communication speed and the image processing speed, if the correction accompanying the movement of the transmitting device is not performed, the moving speed is increased. If the speed is faster than normal, the image will be displayed on the receiving device with a delay. Conversely, if the speed is slower than normal, even if the information at the front is valuable, it will not be related to the zoom magnification. May not be displayed. According to the invention of claim 7, such a disadvantage can be eliminated.
[0023]
According to an eighth aspect of the present invention, in the navigation system according to any one of the first to seventh aspects, the photographing unit is a still image photographing unit.
[0024]
According to the eighth aspect of the present invention, since a still image can be transmitted to the other party, the communication capability may be lower than that of a moving image, which is systemically advantageous. In addition, although a moving image has a sense of presence, there is a problem that it is difficult for a side guide to find a mark because the scene changes quickly. On the other hand, according to the invention of claim 8, there is no such problem, and as a result, there is an effect that more appropriate route guidance can be realized.
[0025]
Note that the navigation system of the present invention is not limited to a navigation system for a vehicle, and can be applied to a mobile communication terminal such as a mobile phone or a PDA having a communication function. As a method of using such a mobile communication terminal, for example, when traveling by bus, the destination of the bus is notified of the current location of the bus, and the destination is notified of the bus. The arrival time of the destination can be predicted, and the person on the bus can be notified from the other party of how long it will arrive at the destination. Especially when grandpa and grandmother go to meet grandchild and vice versa, grandchildren and grandmother go to meet grandchild and grandmother. It has the effect of making it possible for people with weak traffic to travel with peace of mind.
[0026]
Also, when both the transmitting side and the receiving side are car navigation devices, if both have the same function, in cases such as going to a resort with a plurality of vehicles, such as communicating with each other, Alternatively, the present system can be used in such a manner that a road condition ahead is obtained from a preceding vehicle, or a road condition is obtained from a following vehicle.
[0027]
A navigation device according to claim 9 for realizing the navigation system of the present invention acquires a current position, searches a map information database, and displays a map around the current position on a display; A photographing means for photographing an image, a communication means having a multi-access function capable of communicating at least image information and sound information, and the communication means, wherein image information and sound information are exchanged with a communication terminal of the other party. A communication control unit that establishes a communicable state, transmits image information captured by the capturing unit to the destination communication terminal, and receives at least audio information from the destination communication terminal. In addition, position information transmitting means for transmitting position information relating to the current position of the transmitting side, and position data transmitted from the destination communication terminal. And Shin, characterized in that it includes a target point display means for performing a target point displayed at the position on the map corresponding to the position data.
[0028]
A navigation device according to claim 10, which is also implemented to realize the navigation system of the present invention, obtains a current position, searches a map information database, and displays a map around the current position on a display; A photographing means for photographing an image, a communication means having a multi-access function capable of communicating at least image information and sound information, and the communication means, wherein image information and sound information are exchanged with a communication terminal of the other party. Establishing a communicable state, transmitting an image photographed by the photographing means to the destination communication terminal, and a transmission-side device having communication control means for receiving at least audio information from the destination communication terminal, A zoom unit that controls a zoom magnification of the photographing unit based on a display speed until the image is displayed on the destination communication terminal. Characterized in that it comprises a magnification control means.
[0029]
The navigation device according to claim 11 is the navigation device according to claim 10, wherein in addition to the image information, a position information transmitting unit that transmits position information relating to a current position of a transmitting side, and Target position display means for receiving the position data and displaying a target point at a position on a map corresponding to the position data.
[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a navigation system 1 according to the embodiment. It comprises a vehicle 5, a GPS satellite 6, a communication tower 7, a server 8, and a destination communication terminal 9. The vehicle 5 includes a car navigation device 10 and a camera 21.
[0031]
As shown in FIG. 2, the car navigation device 10 receives a radio wave from the GPS satellite 6 and detects a current position of the vehicle, an operation unit 12, a display unit 13, a radio unit 14, , A microphone 15, a speaker 16, and a control circuit 17 for controlling them.
[0032]
The wireless unit 14 has a function equivalent to a mobile phone, a PHS, or the like, and has a multi-access function capable of transmitting and receiving image information and audio information.
[0033]
The control circuit 17 includes a known CPU 17a, a ROM 17b, a RAM 17c, an EEPOM 17d, an I / O port 17e, and a hard disk 17f. The control circuit 17 is configured to receive an image signal from the camera 21 and a vehicle speed signal from the vehicle speed sensor 22 via the I / O port 17e. The control circuit 17 is also configured to be able to output a control signal such as a change in zoom magnification to the camera 21 via the I / O port 17e.
[0034]
The EEPROM 17d stores the still image of the still image from the vehicle 5 using the communication network type (public telephone line, ISDN, ADSL, mobile phone line, PHS line, etc.) and the communication terminal type (CPU, RAM, modem, etc.) as parameters. A display speed database 17g relating to the time from when the data is transmitted to when the image is displayed on the destination communication terminal 9 is stored. The hard disk 17f stores map data.
[0035]
The camera 21 is mounted at a position where an image in front of the vehicle 5 can be captured, and has a function of capturing a still image.
[0036]
As shown in FIG. 1, the destination communication terminal 9 includes a modem 31, a personal computer 32, and a telephone 33.
[0037]
Next, the contents of the multi-access communication process executed in the navigation system 1 of the present embodiment will be described with reference to the flowchart of FIG. This process starts when the gusset access communication process is selected from the operation unit 12, outputs a message “Please specify a destination” from the speaker 15 (S 10), and displays a telephone number list on the display unit 13. (S20), and waits until the other party is selected (S30). The other party can be selected by voice input of the other party name from the microphone 16 in addition to the selection by the key operation from the operation unit 12.
[0038]
When the destination is selected (S30: YES), a call signal is transmitted to the destination, and a predetermined negotiation process of receiving a response signal is executed, thereby performing multi-way communication with the destination. The access communication is established (S40). At this time, information on the type of communication network to the destination and the type of device of the destination communication terminal 9 is acquired and stored in the RAM 17c (S50).
[0039]
Next, the display speed S is obtained by searching the display speed database 17g of the EEPROM 17d based on the type of the communication network and the type of the communication device (S60). Next, the vehicle speed V is obtained from the vehicle speed sensor 22 (S70). Then, a zoom magnification Z is calculated from the vehicle speed V and the display speed S (S80). Here, as shown in FIG. 4A, based on the display speed S, the zoom magnification is determined from a zoom magnification table that defines the relationship between the zoom magnification Z0 at a reference speed (for example, 30 km / h) and the display speed S. Z0 is determined (S81). Further, a correction coefficient K is determined from a correction coefficient table using the vehicle speed V as a parameter (S82), and the zoom magnification Z0 is multiplied by the correction coefficient K to obtain the zoom magnification Z = K · Z0. The calculation process (S83) is performed. Here, in the zoom magnification table, as shown in FIG. 4B, the lower the display speed S, the higher the zoom magnification Z0. Further, as shown in FIG. 4C, the correction coefficient table has a relation such that the correction coefficient K of the reference speed is 1, and the value of the correction coefficient K increases as the vehicle speed V increases.
[0040]
When the zoom magnification Z is calculated in this way, the zoom magnification of the camera 21 is controlled based on the calculation result (S90). Then, an image signal is captured from the camera 21 (S100). Next, the current position is fetched from the position detector 11 (S110), map data around the current position is read based on the current position (S120), and the image data fetched in S100, the map data, and the vehicle mark are combined. The transmitted data is combined (S130). Then, the transmission data is transmitted to the destination communication terminal 9 together with the user's voice (S140). As a result, the destination communication terminal 9 displays the forward image A of the vehicle, the map B around the current position, and the vehicle mark M indicating the current position on the map, as shown in FIG.
[0041]
Thereafter, the voice communication is continued (S150), and the process from S70 is repeated every time a predetermined time elapses until the on-hook operation is performed, and the latest image and the vehicle position are transmitted to the destination communication terminal 9 (S160 to S160). S180). FIG. 5 is a schematic diagram showing how the above processing proceeds. The reason why the vehicle speed V is re-acquired in S70 is to transmit a wide-angle image as much as possible and to obtain more appropriate advice when the vehicle speed becomes slower due to a call with the other party approaching the target. . Note that the processing in S70 and subsequent steps may be configured so that the repetition interval changes in accordance with the vehicle speed V so that the higher the vehicle speed V, the shorter the interval.
[0042]
According to the present embodiment, not only the image (still image) photographed by the camera 21 but also the current position of the vehicle and a map around the same are displayed on the other party's communication terminal 9. Even in an area where there are a plurality of landmarks (signs, stores, signs, etc.), it is possible to accurately notify the other party of the current position of the vehicle. Therefore, there is an effect that it is easy for the side guide to guide. Further, since the zoom magnification is controlled in consideration of the display speed S depending on the type of the communication network, the message does not arrive after passing the target at the time of getting the route guidance. In addition, since the zoom magnification is corrected according to the vehicle speed V, the effect of matching the target for road guidance between the vehicle and the other party is further enhanced.
[0043]
Next, a second embodiment will be described. The navigation system 2 according to the second embodiment relates to a communication system between vehicles 5 and 5. As shown in FIG. 6, each of the vehicles 5 and 5 has a car navigation device 10 having a multi-access communication function and a camera 21 mounted thereon. The configuration of the car navigation device 10 is the same as in the first embodiment.
[0044]
The contents of the multi-access communication process executed in the second embodiment will be described with reference to the flowchart of FIG. It is the same as the first embodiment up to the point where the multi-access communication is established, the zoom magnification Z is calculated, the image magnification is controlled by controlling the zoom magnification of the camera 21, and the current position is captured from the position detector 11. (SS10 to S110). In the second embodiment, since the destination is also the car navigation device 10, there is no need to read map data. Therefore, there is no processing in S120 of the first embodiment, and after the current position is fetched, the image data fetched in S100 and the current position data are used as transmission data (S230), and this transmission data is used by the user. It is transmitted to the destination communication terminal 9 together with the voice (S240).
[0045]
Thereafter, the voice communication is continued (S150), and every time a predetermined time elapses, the processing after S70 is repeated to transmit the latest image and the vehicle position to the destination communication terminal 9 (S160 to S180). During this time, if the position data is received from the other party (S250: YES), the position data is displayed on the map on the display unit 13 (S260).
[0046]
On the other hand, the other party's car navigation device 10 executes the processing shown in the flowchart of FIG. When there is a request for multi-access communication (S310: YES), this process starts, and multi-access communication is established (S320). Next, when the received information includes data (S330: YES), display based on this data is executed (S340). Here, the image data in the received data is displayed in the left half area of the display unit 13, and the map and the vehicle mark read based on the position information in the received data are displayed in the right half. The displayed state is the same as that of the destination communication terminal 9 in FIG. 1 of the first embodiment. Next, it is determined whether or not a point has been designated (S350). Here, the entire area of the display unit 13 where the map is displayed constitutes a touch panel, and a point can be designated by the user touching this area with a finger. If a point is designated (S350: YES), position information of this point is calculated (S360). This calculation is performed based on the position information of the map displayed on the display unit 13. Then, this position information is transmitted as data (S370). Note that a voice call is performed except when transmitting and receiving data (S380, S390).
[0047]
As a result of the execution of the control processing as described above, the image in front of the vehicle on the side transmitting the image and the vehicle position on the map are displayed on the display unit 13 of the vehicle on the side receiving the image. , It is possible to easily know where the vehicle on the transmitting side is currently located. Then, when instructing an intersection where a right turn or a left turn is to be made, it can be transmitted as information on a position on the map. As a result, the vehicle that has transmitted the image can acquire not only the voice of the other party but also the position information of the intersection where the vehicle should make a right or left turn. The vehicle can travel under route guidance using the route guidance function of the device 10.
[0048]
Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and it goes without saying that various other forms can be adopted without departing from the scope of the invention.
[0049]
For example, in the second embodiment, not only the position data but also the map data whose position is marked may be transmitted from the car navigation device on the receiving side. Further, the same system as that of the second embodiment can be realized between the car navigation device 10 and a personal computer on which navigation software having the same map data is installed.
[0050]
Further, the correction based on the vehicle speed may not be performed. This is because the vehicle speed should be lower than a certain speed when the route guidance based on the image is required, so that it is sufficient to consider only the time lag based on the display speed by the communication network and the communication device. .
[0051]
Further, the present invention can be implemented as a system for requesting road guidance from a portable terminal having a navigation function, other than a car navigation device.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating a configuration of a navigation system according to a first embodiment.
FIG. 2 is a block diagram illustrating a configuration of a car navigation device according to the first embodiment.
FIG. 3 is a flowchart illustrating the contents of a multi-access communication process according to the first embodiment.
4A and 4B are diagrams illustrating the contents of a zoom magnification calculation process in the multi-access communication process according to the first embodiment, wherein FIG. 4A is a flowchart, and FIGS. 4B and 4C are diagrams illustrating the contents of an operation table; .
FIG. 5 is a schematic diagram illustrating a progress state of a multi-access communication process according to the first embodiment.
FIG. 6 is a block diagram illustrating a configuration of a navigation system according to a second embodiment.
FIG. 7 is a flowchart illustrating the contents of a multi-access communication process in a transmitting terminal according to the second embodiment.
FIG. 8 is a flowchart illustrating the content of a multi-access communication process in a receiving terminal according to the second embodiment.
[Explanation of symbols]
1,2 ... Navigation system
5 ... Vehicle
6 ... GPS satellites
7 Communication tower
8 Server
9 ... Destination communication terminal
10 ・ ・ ・ Car navigation device
11 Position detector
12 ... operation unit
13 Display unit
14 Radio section
15 Microphone
16 ・ ・ ・ Speaker
17 ... Control circuit
17a ... CPU
17b ROM
17c RAM
17d ・ ・ ・ EEPOM
17e ... I / O port
17f Hard disk
17g ・ ・ ・ Display speed database
21 ・ ・ ・ Camera
22 ・ ・ ・ Vehicle speed sensor
31 ・ ・ ・ Modem
32 ・ ・ ・ Personal computer
33 ・ ・ ・ Telephone

Claims (11)

Map display control means for acquiring a current position, searching a map information database, and displaying a map around the current position on a display,
Shooting means for shooting images,
Communication means having a multi-access function capable of communicating at least image information and audio information,
And establishing, by the communication means, a state in which image information and audio information can be communicated with the communication terminal of the other party, transmitting an image taken by the imaging means to the communication terminal of the other party, A transmission-side device having communication control means for receiving at least voice information from a destination communication terminal,
In a navigation system including a communication unit having a multi-access function capable of communicating at least image information and audio information, and a receiving side device as the destination communication terminal having an image display unit for displaying received image information,
The communication control unit of the transmission-side device, in addition to the image information, includes a position information transmission unit that also transmits position information regarding the current position of the transmission side,
The receiving device,
Map display control means for displaying a map on a display based on the position information,
Position designation means for designating a position on the map displayed by the map display control means;
Position data transmitting means for transmitting position data relating to the position specified by the position specifying means,
The navigation system, wherein the map display control means of the transmitting device is configured to display a target point at a position corresponding to the position data transmitted from the position data transmitting means. Map display control means for acquiring a current position, searching a map information database, and displaying a map around the current position on a display,
Shooting means for shooting images,
Communication means having a multi-access function capable of communicating at least image information and audio information,
And establishing, by the communication means, a state in which image information and audio information can be communicated with the communication terminal of the other party, transmitting an image taken by the imaging means to the communication terminal of the other party, A transmission-side device having communication control means for receiving at least voice information from a destination communication terminal,
In a navigation system including a communication unit having a multi-access function capable of communicating at least image information and audio information, and a receiving side device as the destination communication terminal having an image display unit for displaying received image information,
A zoom magnification control unit configured to control a zoom magnification of the photographing unit based on a display speed until an image transmitted from the transmission terminal to the reception terminal is displayed by an image display unit of the reception terminal. A navigation system characterized by: The navigation system according to claim 2,
The communication control unit includes, in addition to the image information, a position information transmitting unit that also transmits position information regarding a current position on a transmission side,
The navigation system, wherein the receiving device includes a map display control unit that displays a map on a display based on the position information. In the navigation system according to claim 2 or 3,
The receiving device may further include:
Position designation means for designating a position on the map displayed by the map display control means;
Position data transmitting means for transmitting position data relating to the position specified by the position specifying means,
The navigation system, wherein the map display control means of the transmitting device is configured to display a target point at a position corresponding to the position data transmitted from the position data transmitting means. In the navigation system according to any one of claims 2 to 4,
The zoom magnification control unit includes a zoom magnification calculation unit that calculates the zoom magnification based on a communication speed according to a type of a communication network to the communication terminal of the other party and an image processing speed of a component device of the communication terminal of the other party. Navigation system characterized by the following. The navigation system according to claim 5,
The zoom magnification calculation means is configured as a means for calculating the zoom magnification based on a zoom magnification table that stores a relationship between a type of a communication network, constituent devices of a communication terminal, and a zoom magnification. Navigation system. In the navigation system according to any one of claims 2 to 6,
Comprising a speed detecting means for detecting a moving speed of the transmitting device,
In controlling the zoom magnification, the zoom magnification control means considers the moving speed detected by the speed detecting means and corrects the zoom magnification of the photographing means so as to increase the zoom magnification as the moving speed increases. A navigation system comprising magnification correction means. 8. The navigation system according to claim 1, wherein said photographing means is a still image photographing means. Map display control means for acquiring a current position, searching a map information database, and displaying a map around the current position on a display,
Shooting means for shooting an image,
Communication means having a multi-access function capable of communicating at least image information and audio information,
The communication means establishes a state in which image information and audio information can be communicated with the communication terminal of the other party, and transmits the image information captured by the image capturing means to the communication terminal of the other party. A navigation device comprising: a communication control unit that receives at least voice information from a communication terminal;
In addition to the image information, a position information transmitting unit that also transmits position information regarding the current position of the transmitting side,
A navigation device comprising: target point display means for receiving position data from the destination communication terminal and displaying a target point at a position on a map corresponding to the position data. Map display control means for acquiring a current position, searching a map information database, and displaying a map around the current position on a display,
Shooting means for shooting an image,
Communication means having a multi-access function capable of communicating at least image information and audio information,
The communication means establishes a state in which image information and audio information can be communicated with the communication terminal of the other party, and transmits an image taken by the imaging means to the communication terminal of the other party, and A transmission device having communication control means for receiving at least voice information from the terminal,
A navigation apparatus comprising a zoom magnification control unit that controls a zoom magnification of the photographing unit based on a display speed until the image is displayed on the destination communication terminal. The navigation device according to claim 10,
In addition to the image information, a position information transmitting unit that also transmits position information regarding the current position of the transmitting side,
A navigation device comprising: target point display means for receiving position data from the destination communication terminal and displaying a target point at a position on a map corresponding to the position data.

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