JP2004085308A - Communication navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication navigation device capable of receiving image data of a video telephone or the like and receiving navigation data most suitably according to the state, when the communication navigation device receives the image data of the video telephone or the like and the navigation data from the outside. <P>SOLUTION: This device is equipped with a communication part 7 for receiving the navigation data such as map data used for navigation processing and the image data for the video telephone from an external server, a display part 12 for displaying a map of the periphery of the own car position and the image for the video telephone, and a control part 4 for performing the navigation processing by using the received navigation data, performing signal processing of the image data, and performing display updation of the map of the periphery of its own car position displayed on the display part 12 at longer updation intervals when receiving the image data than when not receiving the data, as its own car position is changed by vehicle movement. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a communication navigation device, and more particularly, to a communication navigation device suitable for displaying a map and other images at the same time.
[0002]
[Prior art]
2. Description of the Related Art In recent years, navigation devices have been widely used due to their convenience. As is well known, a navigation device determines an optimal route from a current location to a destination desired by a user (for example, a route that can reach a destination the fastest) from map data provided in the navigation device to an external device. The search is performed in consideration of the received traffic information and the like. Then, the navigation device displays, on a screen of the display unit, a mark indicating the vehicle on which the navigation device is mounted (hereinafter, referred to as a vehicle position mark) together with a map near the vehicle, and displays the search result as another information. It is displayed on the map displayed on the display unit in a different color from the road. Thereafter, when the vehicle moves, the map displayed on the display unit and the display position of the own vehicle position mark are updated at predetermined time intervals in accordance with the movement, and the user can determine which place the vehicle is currently traveling. To present. Further, when the user drives the vehicle based on the search result, for example, when approaching an intersection to turn left or right, voice guidance or an intersection to turn left or right may be used so that the user can drive without fail based on the search result. (Hereinafter referred to as an enlarged view of an intersection) to guide the user to the destination.
[0003]
With the recent advances in technology, data required for navigation operations, for example, map data required to provide guidance near the position of the vehicle, from an external data server having a storage medium that stores map data, For example, a communication navigation device that receives data via a telephone line has been considered. This communication navigation device downloads and uses the map data stored in the storage medium from an external data server, so that the map data provided in the external data server is always kept up to date, There is no need to provide a storage medium (eg, DVD-ROM, CD-ROM, hard disk, etc.) for storing map data in the vehicle. As a result, the hardware of the navigation device can be provided at low cost, and data that changes over time, such as a new road, a newly opened store, or a closed store, can be reflected in route guidance or the like more quickly. , Etc.
[0004]
Further, in recent years, video distribution by videophone or the Internet has been realized. The video phone transmits audio data along with audio data according to a predetermined protocol, video data captured by the camera as video data, and outputs an audio signal while displaying the video data on a display unit provided on the receiving telephone. This allows the user to make a telephone call while watching the image on the transmitting side, for example, the face of the other party. The video data used for the videophone and the video data on the Internet are also transmitted to the receiver through a communication network such as a telephone line.
[0005]
[Problems to be solved by the invention]
At present, various electronic devices such as a CD player, an MD player, and a DVD player are mounted on vehicles. This is because of the need to do various things in the car. Under such circumstances, it is conceivable that a videophone, an Internet-related device, or the like will be mounted in the vehicle and connected to a communication navigation device. However, if the communication navigation device receives the navigation data and the video data other than the navigation data such as a videophone using the same communication line, the data capacity of the video data other than the navigation data is large. However, if priority is given to reception of video data other than navigation data, there arises a problem that data necessary and sufficient for navigation processing cannot be received.
[0006]
The present invention has been made to solve these problems, and an object of the present invention is to provide a communication navigation device that receives navigation data and video data other than navigation data from the outside, and performs navigation according to the situation. It is an object of the present invention to provide a communication navigation device that can optimally receive data for navigation and video data other than navigation data.
[0007]
[Means for Solving the Problems]
In order to solve the above problem, a communication navigation device according to the present invention includes a communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server; A display unit capable of simultaneously displaying a map near the position and other images, using the received navigation data, as the vehicle position changes due to the movement of the vehicle, the vicinity of the vehicle position displayed on the display unit A control unit that updates the display of the map and performs signal processing of the received video data, wherein the control unit is longer when the video data is being received than when the video data is not being received. The display of the map near the position of the own vehicle is updated at the update interval.
This reduces the amount of navigation data used, thereby reducing the amount of navigation data received and increasing the amount of video data received.
[0008]
Further, the communication navigation device of the present invention uses a communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server, and using the received navigation data. As the vehicle position changes due to the movement of the vehicle, the display unit updates the display of the map in the vicinity of the vehicle position displayed on the display unit, and the control unit performs signal processing of the received video data. A display unit for simultaneously displaying the processing result of the video data, wherein the control unit transmits the navigation data and the video data transmitted from the external server as needed, per predetermined time. The external server is requested to change the data amount ratio.
Accordingly, the communication navigation device can appropriately obtain the respective data amounts as needed for the navigation data and the video data.
Further, in the communication navigation device according to the present invention, the control unit may control the navigation data and the video data transmitted from the external server for a predetermined time depending on the necessity of the navigation data accompanying the movement of the vehicle position. The external server is requested to change the ratio of the transmission data amount per unit.
Thus, the communication navigation device can appropriately obtain the data amounts of the navigation data and the video data in accordance with the necessity of the navigation data accompanying the movement of the vehicle position.
[0009]
Further, the communication navigation device of the present invention includes a communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server, a map near the own vehicle position, A display unit capable of simultaneously displaying images other than the above, using the received navigation data, as the vehicle position changes due to the movement of the vehicle, a map near the vehicle position displayed on the display unit at a predetermined update interval. And a control unit that performs signal processing of the received video data, and the control unit, when the own vehicle position is close to a predetermined point while receiving the video data, The map display update interval is shorter than the predetermined update interval.
As a result, the use amount of the navigation data need only be large when necessary, so that the reception amount of the video data can be increased and the reception amount of the navigation data can be reduced.
[0010]
Further, the communication navigation device of the present invention is a communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server, map data received from the external server A storage unit for storing a map near the own vehicle position and other images at the same time.Using the received navigation data, a predetermined update is performed as the own vehicle position changes due to the movement of the vehicle. A control unit that updates the display of the map near the vehicle position displayed on the display unit at intervals and performs signal processing on the received video data, wherein the control unit stores the map data stored in the storage unit. Is updated, the video display on the display unit is changed to a still image display.
As a result, the map data can be updated in a short time.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
(A) Configuration of the present invention
A communication navigation device according to the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram of a communication navigation device 1 that implements the present invention and related servers and the like. In the figure, reference numeral 2 denotes a GPS receiver that detects the current position, traveling direction, vehicle speed, and the like of the vehicle by satellite navigation, a gyro for detecting the rotation angle of the vehicle, and the like, and obtains the position, current date, and the like of the vehicle. And a vehicle speed pulse detector 4 for detecting a vehicle speed pulse generated by the movement of the vehicle, and a current position of the vehicle based on information obtained from the information acquirer 2 and the vehicle speed pulse detector 3. , Azimuth, speed, etc., are detected with high precision, and a map image near the current position of the vehicle is displayed on the display unit 12 together with a vehicle position mark on the display unit 12 using map data acquired via the communication unit 7 described later. It is a control unit that provides various kinds of guidance information to the user according to the movement. Reference numeral 5 denotes an operation unit for performing various input operations for navigation and videophone. Reference numeral 6 denotes a ROM that stores an operation program for the control unit 4 to perform a navigation operation and an application for controlling a communication unit 7 described later.
[0012]
A communication unit 7 connects the communication navigation device 1 and an external server 13 described below via a communication network 14 such as a telephone line. The communication unit 7 is a mobile phone or a telephone unit having a communication function for connecting to the server 13, and is assigned a specific IP address (number) or the like. Further, the communication unit 7 can be connected to another videophone 10 via the server 13 and a communication network 15 such as a telephone line. It is determined whether the call is an incoming call. If the incoming call is from the videophone 10, the audio data and the video data are restored, and the audio signal is output to the audio output unit 11 (for example, a speaker or a headphone). The signals are output to the display unit 12, respectively. When the videophone is used, the voice data and the video data of the speaker input from the microphone / camera unit 16 are transmitted to another videophone via the communication unit 7, the communication network 14, the server 13, and the communication network 15. It has become. Reference numeral 8 denotes a storage unit configured by, for example, a DRAM or the like. The storage unit 8 stores map data and the like received via the communication unit 7.
[0013]
Although not shown, the data server 9 has a storage medium for storing navigation data (for example, map data) necessary for the communication navigation device 1 to perform a navigation operation. In performing the navigation operation, the data required is acquired from the data server 9 via the communication network 14, the server 13, and the communication network 15.
[0014]
The display unit 12 displays information necessary for a navigation operation such as map data and a vehicle position mark, and when receiving a telephone call from the video phone 10, converts the video data transmitted from the video phone 10 into a moving image or the like. It is displayed as. FIG. 2 is a display example in which map data and video data from a videophone are simultaneously displayed on the display unit 12.
[0015]
The detailed description of the configuration in which the communication navigation apparatus 1 transmits and receives data to and from the data server 9 and the videophone 10 via the server 13 is described in Japanese Patent Application No. 2001-310739, the title of the invention, filed earlier by the present applicant. Method and Apparatus for Providing Multimedia Information ".
That is, the main function of the server 13 is, as shown in FIG. 3A, combined software for transmitting and receiving a plurality of user data A to N in a protocol stack that handles user data of the multimedia protocol H323 as a whole. Decomposition software is installed, and audio data can be processed by an audio codec, and video data can be processed by a video codec. As for the data to be processed as described above, all the data input to the server 13 are converted into the data of the H323 specification, and then the data processing described later is performed.
[0016]
The data of the audiovisual communication specification H323 used here is processed by further adding, for example, data indicating “data type” as shown in FIG. 3B to the input data. The plurality of user data having such a data structure are respectively decomposed into a data structure as shown in FIG. In this example, data of a data number, a link flag, a sequence number, and the number of data are given to each of the decomposed data, and a CRC is given at the end if necessary.
[0017]
The processing of a plurality of multimedia data in the server 13 in accordance with the above data format is performed, for example, as shown in FIG. The illustrated example shows an example in which two data, user data A and user data B, are processed for convenience of explanation, and the user data A is preceded by the data as shown in FIG. The data type is assigned, and therefore, data indicating the user data A is assigned to this. Similarly, data indicating the data type B is added to the user data B. Such user data is divided into packets of, for example, 256-byte units at equal intervals according to the data amount. Thereby, for example, the user data A is divided into A1 to A5 packets, and the user data B is divided into B1 to B4 packets. In this example, the last data A5 of the user data A and the last data B4 of the user data B are extra data, indicating that the data amount is smaller than the previous data.
[0018]
When the user data divided as described above is reconstructed in accordance with the data format as shown in FIG. 3C, the user data A is composed of, for example, “A1” data as shown in FIG. For the “first data”, “1” indicating the user data A is added as a data number, and then “1” indicating that there is data following this data as a link flag, and then As the sequence number, “1” of “A1” indicating the order of the decomposed data in the user data A is recorded. Thereafter, a number indicating the number of data A1 is recorded, and thereafter, the data A itself is recorded. Finally, a CRC is provided as needed.
[0019]
Similarly, for the second data, “2” indicating the user data B is added as the data number, then “1” is added as the link flag, and then “1” of “B1” is added as the sequence number. After that, the number of data B1 is recorded, then the data B itself is recorded, and finally the CRC is recorded. Thereafter, the third to seventh data are configured in the same manner as described above. In the eighth data, “0” indicating that the link flag is the last data in the data string of the data type B is recorded, and the ninth data is recorded. Similarly, “0” indicating the last data in the data string of the data type A is also recorded in the data of “A”.
[0020]
The data thus decomposed, encoded and reconstructed are multiplexed from the first data to the ninth data as shown in the lower part of FIG. 4 and transmitted in order. In the above example, an example in which two data are decomposed, multiplexed, and transmitted in parallel has been described. However, the number of user data is arbitrary as necessary. It can be sent according to the protocol.
[0021]
In this transmission, it is also possible to assign a priority to the transmission of a plurality of pieces of multimedia information, and to transmit a plurality of pieces of service data in accordance with the determined priority. The priority at this time can be determined by the order of transmitting predetermined data, the average transmission capacity that can be used by the service, and the like. When the priority is determined in advance, the user sets or It may be fixed by default, or may have a function of changing at any time according to the data capacity of the service and further the user's request.
[0022]
The receiving side can perform the reverse processing of the transmitting side, decompose the data, and combine each user data to reproduce each data. At this time, the communication navigation device 1, which is an information terminal on the user side, can receive all types of multimedia information as long as it has an H323 data processing function as a multimedia data processing function. In the communication navigation device 1, which is an information terminal device on the user side, the corresponding protocol and function are notified to the server 13, the service content is selected and notified to the server 13, and the user receives the information as described above. It also has a function to output the instruction when determining the sending order.
[0023]
According to the present invention, when sequentially taking in navigation data such as map data while performing video distribution or the like via a videophone or the Internet, the server 13 responds to a request from the communication navigation device 1 and sets the transmission priority (transmission) of both data. The ratio of the amount of data, that is, the ratio of the amount of data transmitted per predetermined time) is changed.
[0024]
This is because when the user data A and the user data B in FIG. 4 are simultaneously transmitted in a time-division manner, the data A1, data B1, data A2, data B2,. By alternately transmitting the data and the data of one packet obtained by dividing the user data B, the priorities for the user data A and the user data B can be made equal, and the user data A and the user data B can be simultaneously time-divided. When transmitting the data, data A1, data A2, data B1, data A3, data A4, data B2,..., Two packets of user data A and one packet of user data B Are transmitted alternately with each other, so that the ratio of the amount of data transmitted between the user data A and the user data B per predetermined time is It can be set to 2: 1, can be transmitted with priority user data A to the user data B. Further, by appropriately setting the order of the transmission, various variations can be given to the priority of the user data A and the user data B. The user data A here corresponds to video data and audio data for a videophone, and the user data B corresponds to navigation data such as map data.
[0025]
(B) Processing
The operation processing of the communication navigation device according to the present invention will be described with reference to the flowcharts shown in FIGS.
[0026]
(A) First embodiment
The process of updating the display of the map near the own vehicle position by the communication navigation device of the present invention when the vehicle is running will be described with reference to the flow shown in FIG.
First, the control unit 4 of the communication navigation device 1 checks whether or not the video data of the videophone is currently being received (step 101). If the video data is being received, the server 13 transmits the vehicle position data to the server 13. While transmitting the video data, the ratio of the transmission data amount between the video data and the map data is adjusted, and the video data is transmitted while the video data is updated at a time interval T1 (for example, 1.6 seconds) of a predetermined length. The map data in the vicinity of the vehicle position is transmitted each time, and a request is made via the communication unit 7 to replenish map data sufficient to update the display map every time at the time interval T1 (step 102). The server 13 receives the necessary map data from the navigation data server 9 and starts transmitting the video data and the map data to the communication navigation device 1 in a manner of transmitting in response to the request. The control unit 4 starts receiving map data and video data sent from the server 13 via the communication unit 7 (step 103). Here, the received map data is stored in the storage unit 8 as necessary. Further, the control unit 4 periodically transmits the vehicle position data to the data server 9 via the server 13 via the communication unit 7. When receiving the map data, it is assumed that the map data and the video data are appropriately mixed and transmitted in packet units according to the data communication speed and the data amount of the map data.
[0027]
Next, it is checked whether or not a map based on the map data has already been displayed on the display unit 12 (step 104). If it has not been displayed yet, the map data necessary for display is received and stored in the storage unit 8. After the storage, a map near the own vehicle position is displayed on the display unit 12 (step 105). If the map is already displayed in step 104, the control unit 4 waits for the time interval T1 to elapse while receiving the transmitted data (step 106). The map display near the own vehicle position on the display unit 12 is updated based on the stored map data (step 107).
After displaying the map in step 105 or updating the map display in step 107, it is checked whether or not the video data of the videophone is being received (step 108). The operation after step 106 is repeated.
[0028]
If it is determined in step 101 that the video data of the videophone is not being received, the server 13 stores the map near the own vehicle position required for updating the map at a predetermined time interval T2 (for example, 0.4 seconds). Data is transmitted each time, and a request is made via the communication unit 7 to replenish map data sufficient to update the display map at the time interval T2 every time (step 109). Here, the time interval T2 is set to be shorter than the time interval T1. The server 13 receives the necessary map data from the navigation data server 9 and starts transmitting the map data to the communication navigation device 1 in a manner of transmitting in response to the request. The control section 4 starts receiving map data sent from the server 13 via the communication section 7 (step 110). Here, the received map data is stored in the storage unit 8 as necessary.
[0029]
Next, it is checked whether or not a map based on the map data is already displayed on the display unit 12 (step 111). If not yet displayed, the map data necessary for display is received and stored in the storage unit 8. After the storage, the map near the own vehicle position is displayed on the display unit 12 (step 112). If the map is already displayed in step 111, the control unit 4 waits for the lapse of the time interval T2 while receiving the transmitted data (step 113). Based on the stored map data, the map display near the own vehicle position on the display unit 12 is updated (step 114).
After displaying the map in step 112 or updating the map display in step 114, it is checked whether or not the video data of the videophone is being received (step 115). The operation after step 113 is repeated.
If video data is being received in step 115, the operation from step 102 is performed, and if video data is not being received in step 108, the operation from step 109 is performed.
[0030]
In the above-described embodiment, the update interval due to the reception of the map data stored in the storage unit 8 and the update interval of the map display on the display unit 12 are set to be the same. Can be set longer.
Although the received map data may be used immediately for map display, it is desirable that the map data used for map display be received to some extent earlier with sufficient time.
Further, the traveling of the vehicle may be either when the vehicle is traveling with the guidance route set or when the vehicle is traveling without the guidance route.
[0031]
(B) Second embodiment
First, in this embodiment, the communication navigation device first transmits the destination and the current location to the server, the server performs a route search, sets an optimal guidance route to the destination, and then, along the guidance route, It is assumed that the data of the guidance intersection is transmitted from the server to the communication navigation device together with the map data with the guidance route.
FIG. 6 is a flow chart of FIG. 6 showing a map display update processing operation in the vicinity of the own vehicle position in the communication navigation apparatus of the present invention when the vehicle approaches a predetermined point such as a guidance intersection or a destination where the vehicle should turn while displaying the videophone image. It will be described according to.
Here, when the control unit 4 of the communication navigation device 1 receives the video data of the videophone transmitted from the server 13 via the communication unit 7 and displays the video data on the display unit 12, In response to an operation or the like, an operation of displaying a map near the own vehicle position is started.
[0032]
First, the control unit 4 of the communication navigation device 1 transmits the current position data of the own vehicle calculated from the information acquired from the information acquisition unit 2 and the vehicle speed pulse detection unit 3 to the data server 9 via the server 13, The map data near the position is received from the data server 9 via the server 13. Then, based on the map data (including the guidance intersection data) and the current position data of the own vehicle, it is checked whether or not the vehicle is currently approaching the intersection within a predetermined distance from the intersection to be turned (step). 201) When the vehicle is not approaching, the vehicle position data is transmitted to the server 13 and the ratio of the transmission data amount between the video data and the map data is adjusted so that the predetermined data is transmitted while transmitting the video data. It is enough to transmit the map data near the own vehicle position necessary for the map update every time at the time interval T1 (for example, 1.6 seconds), and to update the display map every time at the time interval T1. A request is made via the communication unit 7 to replenish new map data (step 202). The server 13 changes the transmission method from the previous transmission method to the transmission method according to this request, and receives the necessary map data from the navigation data server 9 and sends the video data and the map data to the communication navigation device 1. Start sending.
[0033]
The control unit 4 starts receiving map data and video data sent from the server 13 via the communication unit 7 (step 203). Here, the received map data is stored in the storage unit 8 as necessary. Further, the control unit 4 periodically transmits the vehicle position data to the data server 9 via the server 13 via the communication unit 7. When transmitting the map data, it is assumed that the map data and the video data are appropriately mixed and transmitted in packet units according to the data communication speed and the data amount of the map data.
[0034]
Next, it is checked whether or not a map based on the map data is already displayed on the display unit 12 (step 204). If it is not yet displayed, the map data necessary for display is received and stored in the storage unit 8. After the storage, the map near the own vehicle position is displayed on the display unit 12 (step 205). In step 204, if the map is already displayed, the control unit 4 waits for the time interval T1 to elapse while receiving the transmitted data (step 206). Based on the stored map data, the map display on the display unit 12 near the own vehicle position is updated (step 207).
After displaying the map in step 205 or updating the map display in step 207, it is checked whether or not the vehicle has approached within a predetermined distance from the intersection to be turned (step 208). If not, the operation after step 206 is repeated.
[0035]
In step 201, when the own vehicle is within a predetermined distance from the intersection to be turned and is approaching the intersection, the own vehicle position data is transmitted to the server 13, and the video data and the map data are transmitted. By adjusting the ratio of the data amount, while transmitting the video data, map data near the own vehicle position necessary for updating the map is transmitted every time at a time interval T3 (for example, 0.8 seconds) of a predetermined length. A request is made via the communication unit 7 to replenish map data sufficient to allow the display map to be updated each time at the time interval T3 (step 209). Here, the time interval T3 is set to be shorter than the time interval T1. The server 13 changes the transmission method from the previous transmission method to the transmission method according to this request, and receives the necessary map data from the navigation data server 9 and sends the video data and the map data to the communication navigation device 1. Start sending. The control unit 4 starts receiving map data and video data sent from the server 13 via the communication unit 7 (step 210). Here, the received map data is stored in the storage unit 8 as necessary. Further, the control unit 4 periodically transmits the vehicle position data to the data server 9 via the server 13 via the communication unit 7.
[0036]
Next, it is checked whether or not a map based on the map data has already been displayed on the display unit 12 (step 211). If not yet displayed, map data necessary for display is received and stored in the storage unit 8. After the storage, a map near the own vehicle position is displayed on the display unit 12 (step 212). If the map is already displayed in step 211, the control unit 4 waits for the time interval T3 to elapse while receiving the transmitted data (step 113). Based on the stored map data, the map display near the own vehicle position on the display unit 12 is updated (step 214).
After displaying the map in step 212 or updating the map display in step 214, it is checked whether or not the own vehicle has passed an intersection to be turned (step 215). The operation after step 213 is repeated.
If the vehicle has passed through the intersection at step 215, the operation from step 202 is performed, and if the vehicle approaches within a predetermined distance from the intersection at which the vehicle should turn at step 208, the operation from step 209 is performed.
[0037]
In the above-described embodiment, the update interval due to the reception of the map data stored in the storage unit 8 and the update interval of the map display on the display unit 12 are set to be the same. Can be set longer.
Although the received map data may be used immediately for map display, it is desirable that the map data used for map display be received to some extent earlier with sufficient time.
Furthermore, the intersection guidance screen data is also transmitted from the server to the communication navigation device in addition to the guidance intersection data together with the map data with the guidance route, and the intersection guidance screen is also displayed when approaching within a predetermined distance from the intersection to be turned. It can also be displayed together with the section 12.
[0038]
(C) Third embodiment
The process of updating the display of the map near the own vehicle position by the communication navigation device of the present invention when the vehicle is traveling will be described with reference to the flow shown in FIG.
It is assumed that the control unit 4 of the communication navigation device 1 is currently receiving video data of a videophone.
First, it transmits to the server 13 via the communication unit 7 to transmit the own vehicle position data and to transmit the map data near the own vehicle position required for updating the map instead of interrupting the transmission of the video data ( Step 301). In response to this request, the server 13 starts to transmit map data to the communication navigation device 1 upon receiving supply of necessary map data from the data server 9 for navigation. The control unit 4 starts receiving map data sent from the server 13 via the communication unit 7 (step 302). Here, the received map data is stored in the storage unit 8 as necessary. Then, the control unit 4 changes the video of the videophone displayed on the display unit 12 from a moving image to a still image (step 303).
[0039]
Next, it is determined whether or not the reception of the map data has been completed, for example, based on a signal included in the transmitted map data (step 304). The control unit 4 updates the map display near the own vehicle position on the display unit 12 based on the map data stored in the storage unit 8 (step 305), starts receiving video data (step 306), and displays the image data. The video of the videophone displayed on the unit 12 is changed from a still image to a moving image (step 307). It should be noted that the server 13 resumes the transmission of the video data of the videophone as soon as the transmission of the map data to the communication navigation device 1 is completed.
[0040]
In the above-described embodiment, the map display on the display unit 12 is updated after the update by the reception of the map data stored in the storage unit 8. However, the map data stored in the storage unit 8 is updated during the update of the map data. The map display can be updated using the non-updated portion or the updated portion in the map.
Also, if still image data or video data of a videophone can be received while map data is being received, the still image displayed while updating the map data can be changed, or a part of the period can be changed. It can be a movie.
[0041]
【The invention's effect】
As described above, according to the communication navigation device of the present invention, when the communication navigation device receives navigation data and video data other than the navigation data from the outside, the navigation data reception and the navigation It is possible to optimally receive video data other than data for use.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a communication navigation device of the present invention.
FIG. 2 is a diagram showing a display example according to the present invention.
FIG. 3 is an explanatory diagram showing data processing means of a multimedia server used in an embodiment of the present invention and a data structure handled here.
FIG. 4 is a diagram showing a data structure handled in an embodiment of the present invention.
FIG. 5 is a processing flow for explaining a first embodiment of the communication navigation device of the present invention.
FIG. 6 is a processing flow for explaining a second embodiment of the communication navigation device of the present invention.
FIG. 7 is a processing flow for explaining a third embodiment of the communication navigation device of the present invention.
[Explanation of symbols]
1 Communication navigation device
2 Information acquisition unit
3 Vehicle speed pulse detector
4 control unit
5 Operation section
6 ROM
7 Communication section
8 Storage unit
9 Data server
10 telephone lines
11 Audio output unit
12 Display
13 Multimedia server
14 Communication Network
15 Communication Network
16 Microphone and camera

Claims (5)

A communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server,
A display unit that can simultaneously display a map near the own vehicle position and other images,
Using the received navigation data, as the vehicle position changes due to the movement of the vehicle, the display of the map near the vehicle position displayed on the display unit is updated, and the signal processing of the received video data is performed. And a control unit,
The communication navigation device, wherein the control unit updates display of a map near the position of the own vehicle at a longer update interval when the video data is being received than when the video data is not received. . A communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server,
Using the received navigation data, as the vehicle position changes due to the movement of the vehicle, the display of the map near the vehicle position displayed on the display unit is updated, and the signal processing of the received video data is performed. Control unit,
A display unit for simultaneously displaying a result of the navigation processing and a processing result of the video data,
The control unit requests the external server to change a ratio of a transmission data amount per predetermined time between the navigation data and the video data transmitted from the external server as needed. Communication navigation device. The control unit changes a ratio of a transmission data amount per predetermined time between the navigation data and the video data transmitted from the external server according to the necessity of the navigation data accompanying the movement of the vehicle position. 3. The communication navigation device according to claim 2, wherein the request is issued to the external server. A communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server,
A display unit that can simultaneously display a map near the own vehicle position and other images,
Using the received navigation data, as the vehicle position changes due to the movement of the vehicle, the display of the map near the vehicle position displayed on the display unit is updated at predetermined update intervals, and the received video data And a control unit for performing signal processing of
The control unit, when receiving the video data, when the own vehicle position is near a predetermined point, the map display update interval is shorter than the predetermined update interval. Navigation device. A communication unit for receiving navigation data including map data used for navigation processing and video data other than the navigation data from an external server,
A storage unit for storing map data received from the external server,
A display unit that can simultaneously display a map near the own vehicle position and other images,
Using the received navigation data, as the vehicle position changes due to the movement of the vehicle, the display of the map near the vehicle position displayed on the display unit is updated at predetermined update intervals, and the received video data And a control unit for performing signal processing of
The communication navigation device, wherein the control unit changes a video display on the display unit to a still image display when updating the map data stored in the storage unit.

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