JP3779577B2 - Display method in navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device, and more particularly, to a navigation device improved so that video data can be displayed using a large-capacity storage medium such as a DVD.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a car navigation device, the vehicle position is detected by means such as GPS or autonomous navigation, and a marker (pointer) indicating the vehicle position is displayed on a map. In addition, functions such as voice guidance and route setting are provided.
[0003]
However, in such a conventional car navigation device, since a map made up of graphics data is used as a base for image display, the position of the vehicle can be recognized by a marker displayed on the map, but the actual scenery Only those previously described in the map data are displayed. For this reason, it is difficult to accurately grasp the surrounding situation such as an easily overlooked intersection at an early time before passing.
[0004]
Further, the map data usually includes only specific items such as intersection names and stores, and it is not always easy for users to use.
[0005]
[Problems to be solved by the invention]
As described above, since the conventional car navigation apparatus uses a map made up of graphics data as a base for image display, only the actual scenery described in advance in the map data is displayed. For this reason, there existed a problem that it was difficult to grasp | ascertain the surrounding conditions, such as an easily overlooked intersection, in the early stage before passage, for example.
[0006]
The present invention has been made in view of the above points, and it is possible to store video data indicating a landscape in a large-capacity storage medium such as a DVD and display the video data in association with the current position or the like. It is another object of the present invention to provide a display method in a navigation device that can provide an image that is easier to use for a user.
[0007]
[Means for Solving the Problems]
The present invention provides a display method in a navigation device that displays a current position on a map, reproduces a map corresponding to the current position from the storage means, displays the map on the display means, and displays a point ahead of the current position for displaying the landscape. Lets the user specify, and the landscape corresponding to the point ahead of the specified current position is reproduced and output from the storage means, and corresponds to the point ahead of the current position specified by the reproduced and output user By combining and displaying the scenery to be displayed on the display means, the current position is displayed as a map, the scenery corresponding to the specified position ahead of the current position is displayed at the same time as the map, and the scenery image of the intersection is stored. Thus, when an intersection to be enlarged and displayed is designated by the user, an enlarged map of the intersection designated for the enlarged display and a still image of a landscape video of the intersection are displayed on the display hand. Wherein the display on.
[0008]
In this way, in the case of simultaneously displaying a map corresponding to the current position and a landscape corresponding to a position ahead of the current position, a function for allowing the user to specify a point ahead of the current position for displaying the landscape is provided. By displaying the current position on the map and displaying the scenery corresponding to the specified position ahead of the current position on the display means at the same time as the map, you can check the position of the vehicle on the map and go ahead It is possible to check the situation at the point with a real image before passing. Furthermore, when an intersection to be enlarged and displayed is designated by the user, an enlarged map of the intersection designated for enlarged display and a still image of a landscape video at the intersection can be displayed on the display means.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
FIG. 1 shows the configuration of a car navigation apparatus according to an embodiment of the present invention. This car navigation device has a function of reproducing moving image data stored in a DVD video format, and displays a current position on a map and a landscape image corresponding to the current position as a moving image. it can. As shown, the car navigation device includes a data processing unit 101, a landscape video display unit 102, a map display unit 103, an operation panel 104, a position detection unit 105, a direction detection unit 106, a DVD-ROM 107, and a DVD video interpretation unit. 111.
[0011]
The data processing unit 101 includes a CPU and a memory in which a program executed by the CPU is stored. The data processing unit 101 obtains the current position from the position detection unit 105 and is interpreted by the DVD video interpretation unit 111. Based on the DVD video format of the ROM 107, the map of the DVD-ROM 107, and the video link information, the map and landscape video corresponding to the current position are read from the DVD-ROM 107, and the map display unit 102 and the video display unit 103 are read out. To display on the screen.
[0012]
The video display unit 102 performs a decoding process corresponding to the landscape video encoding format specified by the data processing unit 101 and displays it on a screen such as an LCD. The map display unit 103 generates an image in which a marker (pointer) indicating the position and direction of a car is superimposed on the map specified by the data processing unit 101, and displays the image superimposed on a landscape video on a screen such as an LCD. To do.
[0013]
The operation panel 104 transmits an operation designated by the user to the data processing unit 101. The position detection unit 105 detects the current position by a method such as GPS or autonomous navigation, and notifies the data processing unit 101 of the current position. The direction detection unit 106 detects the direction in which the user is heading and transmits the detected direction to the data processing unit 101. The DVD-ROM 107 stores map data 110, moving image data 109 composed of landscape images taken by a video camera, a map, video link information 108, and the like. The map / video link information 108 includes first link information indicating the correspondence between the map data and the position information, and second link information indicating the correspondence between the moving image data and the position information. A map corresponding to the current position is searched for by the link information, and moving image data corresponding to the current position is searched for by the second link information.
[0014]
Next, the principle of the display operation of the map and the landscape video in the car navigation device of FIG. 1 will be described with reference to FIG.
[0015]
In FIG. 2, the link information table T1 is generated from the first link information of the DVD-ROM 107, and shows the correspondence between the position and the storage location (address) of the map data. The link information table T2 is generated from the second link information of the DVD-ROM 107, and shows the correspondence between the position and the storage location of the moving image data (time information with reference to the beginning of the moving image stream). . The map buffer 32 is provided in the data processing unit 101, for example, and map data of the corresponding area is read out from the DVD-ROM 107 in advance and stored therein. The MPEG2 decoder 31 is one functional element of the landscape video display unit 102 in FIG. 1 and is used for decoding recorded moving image data digitally compressed and encoded with MPEG2.
[0016]
The overlay display unit 33 is provided in the landscape video display unit 102 or the map display unit 103 in FIG. 1 and displays the map data on the decoded moving image frame as an overlay display.
[0017]
In the system of FIG. 2, for a landscape video, a search point (time) of moving image data corresponding to the current position detected by the position detection unit 105 is obtained by the link information table T2, and a moving image corresponding to the current position is obtained. Data is retrieved from the DVD-ROM 107 and read. The moving image data is decoded by the MPEG2 decoder 31 and then sent to the overlay display unit 33.
[0018]
For map data, a search point (address) of map data corresponding to the current position detected by the position detection unit 105 is obtained by the link information table T1, and map data corresponding to the current position is searched from the map buffer 32. Read out. A marker (pointer) indicating the current location and the traveling direction is superimposed on the map data and sent to the overlay display unit 33.
[0019]
Then, by overlaying the map data on the moving image data by the overlay display unit 33, the map and the landscape video corresponding to the current position are displayed on the same screen. An example of this screen display is shown in FIG.
[0020]
In FIG. 3, reference numeral 202 denotes a map display portion on which map data around the current position including the current position is displayed. Reference numeral 203 denotes a marker indicating the position and direction in which the vehicle is running on the map data 202.
[0021]
A landscape video screen 201 displays a landscape video shot from the current position indicated by the marker. Here, the location of the vehicle is in front of the intersection, the landscape video screen shows the detailed status of the intersection, and there is a utility pole on the right side of the intersection, and a hospital sign is attached to it. Has been.
[0022]
In this way, by simultaneously displaying the landscape video and the map corresponding to the same point, it is possible to grasp not only the current position on the road but also the actual situation around it. In this case, it is preferable that the scenery video is always displayed for the point ahead of the current position. As a result, it is possible to present the actual surrounding situation to the user with a realistic video at an early time before passing.
[0023]
Further, a mode for displaying only a landscape video screen, a mode for displaying only map data, and the like may be prepared, and these modes may be switched by an operation from an operation panel.
[0024]
FIG. 4 shows a processing procedure of the data processing unit 101 when the screen of FIG. 3 is displayed.
[0025]
When the user performs an operation such as turning on the display switch, a display operation of navigation data (map and landscape video) is started (step S11). First, position information indicating the current position is acquired from the position detection unit 105, and thereby the current position is recognized (step S12). Next, map data and landscape video data are searched based on the first and second link information, and a map of the area corresponding to the current position and a marker indicating the current position are displayed in the map data area. A landscape image obtained by photographing a point slightly ahead of the current point is displayed on the screen (steps S13 and S14). In this case, the user can specify how far ahead the point is displayed as a landscape video. Moreover, you may make it display what was image | photographed from the present position shown with a marker. Thereafter, when the user performs an operation such as turning off the display switch, the display process is terminated (step S15).
[0026]
FIG. 5 shows another screen display example.
[0027]
In this embodiment, since the moving image data of the landscape video uses the DVD video format, the moving image data stream can include a plurality of videos taken at different angles from the same shooting point. It is possible to switch the angle at which an image captured is displayed according to an instruction from the user.
[0028]
Therefore, even if the current position is the same, it is possible to switch and display an angle landscape image as shown in FIG. 5A and an angle landscape image as shown in FIG. 5B.
[0029]
Such angle switching can be automatically performed under the control of the data processing unit 101 so as to correspond to changes in the traveling direction of the vehicle, thereby providing a more realistic landscape image. It becomes possible to do.
[0030]
As described above, in the car navigation device of this embodiment, not only a map but also a landscape image corresponding to a current position or a specified position ahead of the current position can be displayed on a display screen such as an LCD. Therefore, it is possible not only to check the position of the vehicle on the map, but also to check the situation of the point where the vehicle will pass in the future, so it is possible to provide easier navigation for the user.
[0031]
In addition, since a function for interpreting DVD video data is provided, information on restaurants and leisure spots can be added, and more information can be provided to the user through interactive operations. A preliminary check can be performed in advance using the player. Also, although the video changes depending on the direction of the automobile, the multi-angle structure of the DVD video format can be used to seamlessly reproduce even if the direction of the automobile changes. Also, when a guide using audio or sub-picture is attached, it is possible to easily change the stream automatically depending on the direction.
[0032]
In addition, in a navigation device or the like having a function for displaying an enlarged view of a major intersection of each road, a video image of the intersection is stored in association with an enlarged map or location information. As a result, the scenery image of the intersection designated to be enlarged can be displayed as a still image or the like.
[0033]
【The invention's effect】
As described above, according to the present invention, a function for allowing the user to specify a point ahead of the current position for displaying the landscape is provided, the current position is displayed on a map, and the point ahead of the specified current position is provided. By displaying the scenery corresponding to the point on the display means at the same time as the map, it is possible to check the situation of the point where you will pass in the real image before passing while checking the position of the vehicle on the map Become. Furthermore, by storing a captured video at a specific point, a still image of the captured video can also be displayed on the display means.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a car navigation device according to an embodiment of the present invention.
FIG. 2 is a view for explaining the principle of an image display operation in the car navigation device according to the embodiment;
FIG. 3 is an exemplary view showing a state in which a landscape image and a map are displayed on the screen in association with each other by the car navigation device according to the embodiment;
FIG. 4 is an exemplary flowchart illustrating a processing procedure of a data processing unit provided in the car navigation apparatus according to the embodiment;
FIG. 5 is a view for explaining angle switching of a landscape image displayed on the screen by the car navigation device according to the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 101 ... Data processing part, 102 ... Scenery image display part, 103 ... Map display part, 104 ... Operation panel, 105 ... Position detection part, 106 ... Direction detection part, 107 ... DVD-ROM, 111 ... DVD video interpretation part, 201 ... Scenery video, 202 ... Map, 203 ... Marker.

Claims (2)

In a display method in a navigation device that displays a current position on a map,
A map corresponding to the current position is reproduced from the storage means and displayed on the display means.
Let the user specify a point ahead of the current position to display the landscape,
A landscape corresponding to a point ahead of the designated current position is reproduced and output from the storage means,
By displaying the scenery corresponding to the point ahead of the current position designated by the user that has been reproduced and output on the display means, the current position is displayed as a map, and the designated position ahead of the current position is displayed. Display the corresponding landscape at the same time as the map,
By storing a landscape image of an intersection, when an intersection to be enlarged and displayed is designated by the user, an enlarged map of the intersection designated for the enlarged display and a still image of the landscape video of the intersection are displayed. A display method in a navigation device, characterized by displaying on a display means . The display method in the navigation device according to claim 1 , wherein the scenery image of the intersection is stored in association with an enlarged map of the intersection or in association with position information of the intersection.

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