JPH0823503A - Video recording device, video reproducing device, and recording medium used in those devices - Google Patents

Abstract

(57) [Abstract] [Objective] Improving the analysis accuracy of video data [Configuration] Imaging means attached to the moving body, image converting means for converting the image into the recording format of the recording medium, position measurement for measuring the position of the moving body And a position conversion unit that converts the measured position information of the moving body into a recording format of the recording medium. The image and the position information indicating the presence of the moving body when the image was captured are simultaneously recorded on the same recording medium and reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video recording device, a video reproducing device, and a recording medium used in those devices, which handle a video taken from a moving body and information relating to the position of the moving body.

[0002]

2. Description of the Related Art As an example of photographing a specific area from a moving body such as an automobile or an aircraft and analyzing the image, a case where a new road is constructed can be considered. Taking this case as an example, a conventional video recording / reproducing apparatus and a usage mode thereof will be described.

[0003] For example, when constructing an expressway, a candidate site for construction is first determined, and then a field survey is conducted. In the field survey, it is necessary to accurately survey the positional relationship between the proposed construction site and surrounding buildings and topography over a long distance. Of course, just before the start of construction, a precise survey will be required in the end, but before that, it is necessary to conduct a plausibility study of the candidate sites for construction.

For this reason, first, a method of photographing the entire area of the candidate site from the aircraft along the road scheduled to be constructed can be considered. In this case, the captured image is brought back and reproduced, and detailed analysis is performed while collating it with the topographic map and characteristic buildings.
However, in the case where the topographical change is scarce over a relatively long distance, inconvenience occurs in the matching. Therefore, in general, a method of displaying the time or the elapsed shooting time at the corner of the video tape is adopted, and the position is calculated from this display and the speed of the aircraft. This series of video recording and reproducing is a conventional method, and in these general apparatuses, it is not possible to directly record the video and the position where the video was taken to record. Therefore, analysis may be hindered.

Another example of the problem of the relationship between video and position is railroad route management. In this case as well, the surroundings are photographed while the train is running along the railroad track, and the distance between various signs necessary for train operation, the distinctiveness, and the management status of other facilities are analyzed. for that reason,
It is necessary to understand the correspondence between the image and the position where the image was captured. In recent years, from the viewpoints of ergonomics and environmental engineering, there are increasing attempts to reduce the number of car accidents by analyzing the psychology and behavior of car drivers. In this case as well, since the surrounding conditions, signals, signs, etc. are photographed and analyzed along the target road, it becomes necessary to know the exact correspondence between the image and its position. In any of these cases, the conventional video recording / reproducing apparatus is at most compatible with the above-mentioned time display function.

[0006]

As is clear from the above description, it is important in various analyzes to know the exact position of a video image recorded from a moving body. Nevertheless, the conventional video recording / reproducing apparatus does not sufficiently cope with the error, and there are cases where an error occurs in grasping the position and a great amount of labor is required for calculating the position.

The present invention has been made to solve the above problems, and provides an apparatus for simultaneously recording and reproducing position information of a moving body on the same recording medium when photographing the surroundings from the moving body. With the goal.

[0008]

In order to solve the above-mentioned problems, a video recording apparatus of the present invention is attached to a moving body, and a photographing means for photographing the surroundings, and a recording medium for recording the video photographed by the photographing means. Video conversion means to convert to a format,
It has a position measuring means for measuring the position where the moving body existed when the image was taken, and a position converting means for converting the information on the position of the moving body measured by the position measuring means into the recording format of the recording medium. is there.

Further, the recording medium of the present invention has recorded thereon an image and information about a position where a moving body was present when the image was photographed by the image recording apparatus.

The video reproducing apparatus of the present invention extracts the video information from the recording medium and reproduces it in the display format, and the information about the position of the moving body from the recording medium in the display format. And a position reproducing means for reproducing.

Further, in the video reproducing apparatus of the present invention, the position reproducing means stores a map of a map of a moving range of the moving body and information about the position of the moving body extracted from the recording medium into a search code of the map database. And a code generating means for converting.

[0012]

According to the image recording apparatus of the present invention having the above structure, the photographing means attached to the moving body photographs the surroundings,
The image conversion means converts the image into the recording format of the recording medium. On the other hand, the position measuring means measures the position where the moving body exists when the image is taken, and the position converting means converts the information on the measured position of the moving body into the recording format of the recording medium. As a result, it is possible to record the image on the recording medium while associating the image and the position where the moving body existed when the image was captured.

Further, according to the recording medium of the present invention, since the video recording device records the video and the information on the position where the moving body existed when the video was photographed, the information is recorded in the video reproducing device. Can be associated and played.

Further, according to the video reproducing apparatus of the present invention, the video reproducing means extracts the information on the video from the recording medium and reproduces it in the display format, while the position reproducing means reproduces the information on the position of the moving body from the recording medium. To extract and play in display format. As a result, the image and the position where the moving body existed when the image was captured can be displayed on the display device while being associated with each other.

Further, according to the video reproducing apparatus of the present invention, when the position reproducing means reproduces the position of the moving body, the code generating means generates the search code, so that the map corresponding to the position of the moving body is stored in the map database. You can search from. As a result, it is possible to display the image and the position of the moving body on the map when the image was captured in association with each other on the display device.

[0016]

【Example】

Example 1. Examples of the present invention will now be described. FIG. 1 is a functional block diagram of a video recording apparatus according to an embodiment, and FIG. 2 is a functional configuration diagram of a video reproducing apparatus.

First, the video recording apparatus will be described with reference to FIG.

In FIG. 1, the image recording apparatus has a video camera 1 for photographing the outside from an automobile which is a moving body, and a video deck 5 for recording the image photographed by the video camera 1 on a video tape 3. . The video captured by the video camera 1 is connected to the video input 50 of the VCR 5, but the audio captured by the microphone (not shown) of the video camera 1 is not used. Therefore, the video recording apparatus of the present invention does not require a mechanism for recording audio.

On the other hand, the position of the automobile is constituted by a known technology such as a global positioning system (GPS) or a map matching system, or an autonomous driving system which calculates the position in accordance with the rotation of the wheels. It is measured by the measuring unit 7. The position data of the vehicle measured by the position measuring unit 7 is digital data as it is, and therefore is converted into an audio signal by the audio signal modem device 9, and the audio input 51 of the video deck 5 is input.
Is input to.

The operation of the above configuration will be described.

First, a car is driven in an area where image analysis is required. At this time, it is assumed that the video camera 1 is oriented from the automobile in the direction in which shooting is required. The videotape 3 shot in this way and set on the VCR 5
The position measuring unit 7 accurately measures the ever-changing position of the vehicle while being recorded. The measured position data is converted into an audio signal by the audio signal modem device 9 and recorded as audio on the video tape 3 via the audio input 51 of the video deck 5. As a result, the video and the data relating to the position where the video is captured are simultaneously recorded on one video tape 3.

Next, the video reproducing apparatus according to the present invention will be described with reference to FIG.

The video reproducing apparatus has a video deck 11 for setting the video tape 3. The video output 110 of the VCR 11 is connected to a normal monitor 13. On the other hand, the audio output 111 of the video deck 11 is connected to the audio signal modem device 15 for reproducing the initial position data from the audio signal. Voice signal modem device 1
5, the data reproduced from the position data is returned to the digital coordinate data at that time. Next, this coordinate data is input to the display data generation unit 17 and converted into a monitor output format. The data converted by the display data generation unit 17 is output to the normal monitor 19.

The operation of the video reproducing apparatus having the above configuration will be described.

First, the video tape 3 recorded by the video recording device is set on the video deck 11. At this time, the video is output to the monitor 13 as it is, and the correct video is displayed. This is because the video recording device recorded video without any operation.

On the other hand, the audio signal of the video tape 3 becomes a meaningless audio even if it is reproduced by the usual method. Therefore, this voice signal is passed through the voice signal modem device 15 and returned to the initial position data. The position data thus converted into the digital coordinate data is input to the display data generation unit 17.
Next, the display data generation unit 17 converts the coordinate data into a monitor output format, and the position of the automobile is displayed on the monitor 19 as coordinates.

The above is the outline of the video recording apparatus, the video reproducing apparatus and the video tape which is a recording medium used for them according to the first embodiment.

In this embodiment, an automobile is taken as an example of the moving body, but it may be another moving body such as an aircraft, a train or a ship. In this case, the configuration of the position measuring unit 7 is properly selected. In addition, the embodiment is a VTR
I explained by the method, but this is an optical disk method etc.
Another method may be used. Further, in the video recording apparatus of the present embodiment, the video camera 1, the position measuring unit 7, and the audio signal modem device 9 are shown as separate devices, but they may of course be integrated devices. in this case,
It is obvious that the operability for recording is improved. Similarly, in the video reproducing apparatus of the present embodiment, the video deck 11
And voice signal modem device 15 and display data generation unit 17
Although they are shown as separate devices, they may of course be integrated devices. In this case, the operability for reproduction is naturally improved.

Example 2. In the above-described first embodiment, the position data is finally output to the monitor in the coordinate display. However, depending on the purpose of analysis, rather than the coordinate display, which is a list of numerical values, the site map and the position display of the mobile body on the map are displayed. Is often desirable. The second embodiment is an example in which the above-mentioned video reproducing apparatus is improved in order to meet such an application. Here, the video reproducing apparatus according to the present embodiment will be described with reference to FIG.

The video reproducing apparatus according to the second embodiment has substantially the same configuration as that of the first embodiment, but differs in the following points. That is, the portion that is the display data generation unit 17 in the first embodiment is
It is the map database control unit 21. The map database control unit 21 converts the input position data into a code for database search, a code database 210 that outputs the necessary map data accessed according to the code, and a map database 211 that outputs the output map data. It is configured by a display data generation unit 212 that converts into a monitor display format and outputs. The data output from the display data generation unit 212 is the same as that of the normal monitor 1
9 is connected.

The operation of the video reproducing apparatus having the above configuration will be described.

First, the video tape 3 recorded by the video recording device is set on the video deck 11. The video is output to the monitor 13 as it is. On the other hand, the audio signal of the video tape 3 is reproduced by the audio signal modem device 15 as initial position data, that is, coordinate data.
Up to this point, the procedure is the same as in the first embodiment.

Next, this position data is input to the map database control unit 21. The code generation unit 210 analyzes the position data and generates a code or an index for designating a map including the position of the car from the map database 211. Subsequently, the map data is read from the map database 211 according to this code, and the display data generation unit 212 converts this map data into a monitor output format. In this way, the map is displayed on the monitor 19. On this occasion,
If the map database control unit 21 is configured so that the position of the automobile on the map is indicated by blinking dot marks or the like, and a function for appropriately reducing or enlarging the displayed map is added, the convenience of the user is further improved. Can be planned.

[0034]

As described in detail above, according to the video recording apparatus, the video reproducing apparatus and the recording medium of the present invention, the video and the position where the moving body existed when the video was taken are associated with each other at the same time. Moreover, they can be recorded on the same recording medium, and can be easily reproduced and provided for analysis without impairing their relation. Therefore, unlike the prior art, there is no need to make an error in grasping the position corresponding to the image, or a great amount of labor is required for calculating the position, and a simple configuration can solve the conventional problems. At that time, the information on the position is not only displayed in the coordinates, but also displayed in the map according to the use, and the point where the mobile body is located can be displayed on the map. Therefore, it is possible to facilitate the analysis work in a wider field.

The present invention can be used not only for analysis, but also for training crew members by showing, for example, a video image taken along the navigation route of an aircraft and its position on the map.

[Brief description of drawings]

FIG. 1 is a functional configuration diagram of a video recording device according to a first embodiment of the invention.

FIG. 2 is a functional configuration diagram of the video reproduction device according to the first embodiment of the present invention.

FIG. 3 is a functional configuration diagram of a video reproduction device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Video Camera 3 Video Tape 5, 11 VCR 7 Position Measuring Unit 9, 15 Audio Signal Modem Device 17 Display Data Generation Unit 21 Map Database Control Unit 210 Code Generation Unit 211 Map Database 212 Display Data Generation Unit

Claims (4)

[Claims] 1. A video recording device for recording information including a video image taken from a mobile body on a recording medium, the video recording device being attached to the mobile body, for photographing the surroundings, and recording the video imaged by the photography means. Video conversion means for converting to the recording format of the medium, position measuring means for measuring the position where the moving body existed when the image was shot, and information on the position of the moving body measured by the position measuring means for recording on the recording medium A video recording apparatus comprising: a position conversion unit for converting the video into a format; and recording video and information regarding a position where a moving body was present when the video was captured on the same recording medium. 2. A recording medium on which is recorded an image and information about a position where a moving body was when the image was captured by the image recording device according to claim 1. 3. A video reproducing means for extracting information on an image from the recording medium according to claim 2 and reproducing it in a display format, and a position for extracting information on a position of a moving body from the recording medium and reproducing it in a display format. An image reproducing apparatus comprising: a reproducing unit, and simultaneously displaying an image and information on a position where the moving body was present when the image was captured, on the display unit. 4. The video reproducing apparatus according to claim 3, wherein the position reproducing unit stores a map database storing a map of a range in which the moving body moves, and information about the position of the moving body extracted from the recording medium. A code generation means for converting into a search code of a database; and the video reproduction apparatus simultaneously displays the video and the position on the map where the moving body was present when the video was captured, on the display device. Video playback device.