JP2018046500A - Video storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video storage device for storing video input from each of a plurality of cameras so that reproduction in a state in which a temporal deviation is suppressed is possible even when input from one or some of the plurality of cameras is intercepted.SOLUTION: A video storage device comprises: a storage unit that stores video input from a plurality of cameras, for each camera; and a storage control unit that when video input is intercepted, makes the storage unit store an alternative image as video of a camera whose video input is intercepted until the video is input again. In the video storage device, even when video input from one or some of the cameras is intercepted, an alternative image is stored during an interception period, and a storage time of video of a camera whose input is intercepted is inhibited from being shorter than that of a camera whose input is not intercepted. Consequently, the video storage device can store video input from each camera so that reproduction in a state in which a temporal deviation is suppressed is possible even when input from one or some of the plurality of cameras is intercepted.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a video storage device.

  The drive recorder is a video storage device for storing video at the time of a vehicle accident and other video. The drive recorder includes a camera that captures the front of the vehicle (hereinafter referred to as “main camera”) and a memory that stores video captured by the main camera. These main body camera and memory are incorporated in one housing, and images taken by the main body camera are sequentially stored in the memory. The drive recorder is mounted in a place where it is difficult to block the driver's view, such as between the rearview mirror and the windshield, with the main camera facing the front of the vehicle.

  Some drive recorders can store not only images in front of the vehicle but also images in the back of the vehicle. This type of drive recorder (hereinafter referred to as “front-rear drive recorder”) includes an interface device for inputting video captured by an external camera. The external camera is a place that is difficult to block the driver's field of view, and is attached toward the rear of the vehicle. The front / rear drive recorder and the external camera are communicably connected via an interface device. Images captured by the external camera are sequentially stored in the memory of the front-rear drive recorder via the interface device (see, for example, Patent Document 1).

  As the external camera, a camera mounted on the vehicle in advance may be used. For example, a camera (hereinafter referred to as “reverse camera”) for photographing the state behind the vehicle at the time of back and showing it to the driver may be used.

JP 2013-256167 A

  However, communication between the front-rear drive recorder and the external camera may be interrupted due to various factors that occur during traveling. As the factor, for example, electrical noise generated in the vehicle is garbled on the communication line connecting the front-rear drive recorder and the external camera (image loss) or the like. Another factor is that a contact (connector or the like) that forms a communication route connecting the front and rear drive recorder and the external camera is temporarily cut off due to various vibrations generated in the vehicle. Yet another factor is that when a backward camera is used as an external camera, the external camera does not take a picture unless the shift lever is in the back.

  As described above, when communication between the front-rear drive recorder and the external camera is interrupted, the video for the interrupted time is lost and not stored, and therefore the storage time of the video captured by the external camera is shortened. For this reason, for example, even if images that have been shot simultaneously by the main camera and the external camera are reproduced at the same time, images that do not coincide with each other over time will be reproduced. If it does so, even if it tries to grasp | ascertain a driving | running state by seeing those images | videos, the problem that it cannot grasp | ascertain correctly generate | occur | produces.

  The present invention provides a video storage device that stores video input from each camera so that even if input from some of the plurality of cameras is interrupted, playback can be performed with a temporal shift suppressed. The purpose is to do.

  The video storage device according to claim 1, the storage unit storing each video input from a plurality of cameras, and when the video input is interrupted, the video input is interrupted until the video is re-input. A storage control unit that stores an alternative image in the storage unit as a video of the camera.

  In the video storage device of the present invention, when the video input is interrupted, the substitute image is stored as the video of the camera in which the video input is interrupted until the video is input again. The storage time is suppressed from becoming shorter than the storage time of the video of the camera whose input is not interrupted.

  Therefore, the video storage device of the present invention stores the video input from each camera so that even if the input from some of the plurality of cameras is interrupted, the video can be reproduced with a temporal shift suppressed. can do.

  As in the video storage device according to claim 2, each video is composed of a plurality of still images taken at a predetermined frame rate, and each still image input from each camera at a predetermined timing is stored in the storage unit. Still image groups may be formed in association with images, and still image groups formed at each timing may be stored in chronological order.

  In this way, a plurality of still images having the same shooting timing are collected, and the grouped still images are arranged in time series. Then, when playing back images from each camera, still images taken at the same timing are played back simultaneously.

  Therefore, when the video storage device of the present invention is used, video captured by each camera can be reproduced in synchronization with each other. Therefore, for example, when used for accident verification, it is possible to accurately grasp the situation.

  In the case where the information input unit for inputting the travel information indicating the travel state of the vehicle is provided as in the video storage device according to claim 3, the storage unit also stores the travel information for each still image group. Also good.

In this way, it is possible to grasp an accurate running state when each still image group is being reproduced.
As in the video storage device according to claim 4, an information input unit that inputs travel information indicating the travel state of the vehicle is provided, and the travel information is also stored in the storage unit together with each video. Good.

  As in the video storage device according to claim 5, the storage control unit controls the storage unit to store the image immediately before the video input is interrupted as a substitute image for a predetermined time after the video input is interrupted. Also good.

  In this way, when playing back each video, the most recent image is displayed for the video where the input was interrupted, so the current time in the direction of shooting with the camera where the input was interrupted during the time when the input was interrupted The approximate situation can be grasped.

  As in the video storage device according to claim 6, the storage control unit controls the storage unit to store a fixed image prepared in advance as a substitute image after a predetermined time has elapsed since video input was interrupted. May be.

In this way, it is clearly indicated that a certain time has elapsed since the input of the video was interrupted, so that it becomes easy to find a failure on the camera or the communication path.
As in the video storage device according to claim 7, the main body camera which is a camera integrated with the storage unit and the storage control unit and the external camera which is a separate camera from the storage unit and the storage control unit are sent. An interface unit for inputting the incoming video may be provided. This video storage device can be used as a so-called drive recorder.

  As in the video storage device according to the eighth aspect, the storage control unit may execute the frame interpolation when the video input is interrupted and the frame interpolation is possible.

Fig.1 (a) is the schematic diagram which showed typically a mode that the drive recorder and the rear camera apparatus were attached to the vehicle. FIG. 1B is a block diagram showing an internal configuration of the drive recorder and the rear camera device. FIG. 2A is a schematic diagram schematically showing a state in which video captured by the main camera provided in the drive recorder and the external camera provided in the rear camera device is stored in an internal memory provided in the drive recorder. FIG. 2B is a schematic diagram schematically showing a storage format when video captured by the main camera and the external camera is stored in the internal memory. It is a flowchart of a storage process. It is a flowchart of an alternative process. FIG. 5A is a schematic diagram schematically showing how the latest still image stored in the RAM is stored in the internal memory, and FIG. 5B shows the fixed image stored in the ROM. It is the schematic diagram which showed a mode that it memorize | stores in memory.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.
The drive recorder 1 and the rear camera device 3 described in the present embodiment are used by being mounted in a vehicle as shown in FIG.

  The drive recorder 1 is attached to a place between the rearview mirror and the windshield or other place where it is difficult to block the driver's view. At this time, the drive recorder 1 is mounted such that a main body camera 14 (see FIG. 1B), which will be described later, faces the front of the vehicle.

  The rear camera device 3 is attached to a place where it is difficult to block the driver's view. At this time, the rear camera device 3 is attached so that an external camera 34 (see FIG. 1B), which will be described later, faces the rear of the vehicle.

  As shown in FIG. 1B, the drive recorder 1 and the rear camera device 3 are connected via an interface device 17 provided in the drive recorder 1 and a communication line connected to an interface device 37 provided in the rear camera device 3. They are communicably connected to each other.

  In addition to the rear camera device 3, the drive recorder 1 is connected to the travel information providing device 5 via the interface device 17 so as to be communicable. The travel information providing device 5 is a device that can provide travel information from the vehicle side, and may be an ECU of the vehicle.

Note that the travel information may be any information as long as it is information related to the travel of the vehicle (for example, the state of the brake and the state of the blinker) such as the speed of the vehicle and the traveling direction of the vehicle.
The drive recorder 1 includes a central control device 10, a main body camera 14, an acceleration sensor 15, an internal memory 16, an interface device 17, and a display 18 as internal configurations. These are incorporated in one housing.

  Among these, the central control device 10 further includes a CPU 11, a ROM 12, and a RAM 13. The central control device 10 is communicably connected to the main camera 14, the acceleration sensor 15, the internal memory 16, the interface device 17, and the display 18. The CPU 11 communicates with these to perform storage processing (see FIG. 3) Perform various other processes.

  The ROM 12 stores a program and other data for executing these various processes. Information generated when these processes are executed is temporarily stored in the RAM 13 and unnecessary information is deleted.

The central control device 10 of the drive recorder 1 executes the following processing.
For example, the central controller 10 executes a process for controlling the main camera 14 to capture a still image at a frame rate of 22 fps. The central control device 10 also executes a process of storing a still image captured by the main camera 14 in the internal memory 16 in a storage process described later.

  In addition, the central control device 10 receives an operation of an operator by an operation device (not shown), and uses a still image stored in the internal memory 16 according to an instruction based on this operation, and images a front image and a rear image. A process of displaying the video side by side on the display 18 is also executed.

  Furthermore, when the acceleration sensor 15 detects acceleration such as a vehicle collision, the central control device 10 displays a video image of a few seconds before the detection and a video image of a few seconds taken by the main camera 14 and the external camera 34 after the detection. In addition to the video stored in the storage process, the process of storing in the internal memory 16 is also executed.

The rear camera device 3 includes a central control device 30, an external camera 34, and an interface device 37 as internal configurations. These are incorporated in one housing.
Among these, the central control device 30 includes a CPU 31, a ROM 32, and a RAM 33. The central control device 30 is communicably connected to the external camera 34 and the interface device 17, and the CPU 31 communicates with these to execute various processes.

  The ROM 32 stores programs and data for executing these various processes. Information generated when these processes are executed is temporarily stored in the RAM 33 and unnecessary information is deleted.

  The central control device 30 of the rear camera device 3 executes the following processing. For example, the central control device 30 executes processing for controlling the external camera 34 to capture a still image at a frame rate of 22 fps. In addition, the central control device 30 executes processing for sequentially transmitting still images taken by the external camera 34 to the interface device 17 on the drive recorder 1 side via the interface device 37.

  Next, a process in which the central controller 10 of the drive recorder 1 stores a still image captured by the main camera 14 and the external camera 34 in the internal memory 16 will be described with reference to FIG.

  As shown in FIG. 2A, the central controller 10 sequentially creates frames having the same time interval as the frame rate of the frame rate of the main camera 14 and the external camera 34 in chronological order. The central controller 10 stores each still image captured by the main camera 14 and the external camera 34 in the internal memory 16 and stores each still image in a frame created at the time of storage. To do. Then, each still image taken by the main camera 14 and the external camera 34 is put in each frame arranged in time series as shown in FIG. 2 (b), and a still image group is formed and stored. The Rukoto.

The central control device 10 also stores the travel information input from the travel information providing device 5 when each frame is produced together with each still image.
In this embodiment, since the still images taken by the main camera 14 and the external camera 34 and the running information input from the running information providing device 5 are stored, the vehicle at the moment when each frame is produced is stored. The state before and after and the traveling state at that time can be memorized in association with each other in terms of time.

  Next, the storage process executed by the central controller 10 of the drive recorder 1 will be described with reference to FIGS. This storage process is executed when the vehicle engine starts and the supply of power to the drive recorder 1 is started.

  When the storage process is started, as shown in FIG. 3, first, a startup check process is executed (S10). If an error is found in the drive recorder 1 in this activation check process (S10), an alarm or the like is performed. In this embodiment, the description of the process such as the alarm is omitted.

  Next, frame processing is executed (S11). In this frame process (S11), a process for creating a frame is executed. In this frame process (S11), a process for measuring the same time as the frame interval of the frame rate of the main camera 14 and the external camera 34 is started. Further, in this frame process (S11), a process for defeating an input flag, which will be described later, is executed.

  In S <b> 12, it is determined whether a still image is input from the main camera 14 to the RAM 13. If it is determined in this determination that a still image has been input to the RAM 13 (S12: YES), a recording process (S30) is executed. On the other hand, if it is determined that there is no still image input from the main camera 14 to the RAM 13 (S12: NO), an alternative process (S40) is executed.

In the recording process (S30), a process of sending the still image taken by the main camera 14 stored in the RAM 13 to the internal memory 16 and storing it in the frame produced in S11 is executed.
Further, a process for setting a count value to be described later regarding the main camera 14 to 0 is executed.

  On the other hand, in the alternative process (S40), as shown in FIG. 4, a process for determining whether a predetermined time has elapsed since the still image previously captured by the main camera 14 was stored in the RAM 13 is first executed (see FIG. 4). S42). The time counted in S42 is the same time as the frame interval. If it is determined in S42 that a predetermined time has not passed since the still image previously captured by the main camera 14 was stored in the RAM 13 (S42: NO), the substitution process (S40) ends. On the other hand, if it is determined in S42 that a predetermined time has elapsed since the still image captured by the main camera 14 was stored last time (S42: YES), the process of S43 is executed.

  In S43, a process for incrementing the count value is executed. This count value indicates the number of times that no still image has been input from the main camera 14. Next, S44 is executed.

  In S44, it is determined whether or not the count value indicates that there is no predetermined number of still image inputs from the main camera 14. If it is determined in S44 that the count value indicates that a still image has not been input a predetermined number of times (S44: YES), the most recent still image of the main camera 14 stored in the RAM 13 is copied and stored. (S48). On the other hand, if it is determined in S44 that the count value indicates that a still image has been input a predetermined number of times (S44: NO), the image prepared in advance stored in the ROM 12 is sent to the internal memory 16. (S46). Then, when the process of S46 or S48 is executed, the alternative process (S40) ends.

Next, as shown in FIG. 3, when the recording process (S30) or the alternative process (S40) after S12 is completed, the process of S14 is executed.
In S <b> 14, it is determined whether a still image is input from the external camera 34 to the RAM 13. If it is determined in this determination that a still image has been input to the RAM 13 (S14: YES), a recording process (S30) is executed. On the other hand, if it is determined that there is no still image input from the external camera 34 to the RAM 13 (S14: NO), an alternative process (S40) is executed.

In the recording process (S30), a process of sending the still image taken by the external camera 34 stored in the RAM 13 to the internal memory 16 and storing it in the frame created in S11 is executed.
Further, a process for setting a count value to be described later regarding the external camera 34 to 0 is executed.

  On the other hand, in the alternative process (S40), as shown in FIG. 4, a process for determining whether a predetermined time has elapsed since the still image previously captured by the external camera 34 was stored in the RAM 13 is first executed (see FIG. 4). S42). The time counted in S42 is the same time as the frame interval. If it is determined in S42 that a predetermined time has not elapsed since the last image captured by the external camera 34 was stored in the RAM 13 (S42: NO), the substitution process (S40) ends. On the other hand, if it is determined in S42 that a predetermined time has passed since the still image captured by the external camera 34 was stored last time (S42: YES), the process of S43 is executed.

  In S43, a process for incrementing the count value is executed. This count value indicates the number of times that a still image has not been input from the external camera 34. Next, S44 is executed.

  In S <b> 44, it is determined whether the count value indicates that there is no predetermined number of still image inputs from the external camera 34. If it is determined in S44 that the count value indicates that there is no predetermined number of still image inputs (S44: YES), the most recent still image of the external camera 34 stored in the RAM 13 is copied and stored. (S48). On the other hand, if it is determined in S44 that the count value indicates that a still image has been input a predetermined number of times (S44: NO), the image prepared in advance stored in the ROM 12 is sent to the internal memory 16. (S46). Then, when the process of S46 or S48 is executed, the alternative process (S40) ends.

Next, as shown in FIG. 3, when the recording process (S30) or the alternative process (S40) after S14 ends, the process of S16 is executed.
In S16, a process for determining whether or not an input flag indicating that the storage of the travel information has already been raised has been executed. If it is determined in S16 that the input flag has already been raised (S16: YES), then the process of S18 is executed. On the other hand, if it is determined in S16 that the input flag has not been raised (S16: NO), the storage process (S50) is executed.

  In the storage process (S50), a process is executed in which the travel information sent from the travel information providing device 5 and stored in the RAM 13 is sent to the internal memory 16 and stored in the frame designated in S11. Moreover, the process which raises the input flag which shows having memorize | stored driving information is performed. Next, the process of S18 is executed.

  In S18, it is determined whether or not to end the recording. In the present embodiment, the recording is ended when the engine of the vehicle is turned off or the operator operates an operating device (not shown) to instruct the end of the recording. Therefore, in S18, it is determined whether the engine of the vehicle has been turned off or whether an instruction to end the recording has been given by the operator. If the recording is finished in the determination of S18, the storage process is finished (S18: YES). On the other hand, if it is determined in S18 that the recording is not finished (S18: NO), then the determination in S20 is executed.

  In S20, a process for determining whether or not a predetermined time from the time measurement in S11 has elapsed is executed. If the predetermined time has elapsed (S20: YES), the processing after S11 is executed. If the predetermined time has not elapsed (S20: NO), the processing after S12 is executed again.

  When the recording process described above is executed, in this embodiment, as shown in FIG. 2B, still images and travel information captured by the main camera 14 and the external camera 34 that are grouped for each frame in the internal memory 16. Are arranged and stored in chronological order.

  In the present embodiment, when a still image from the main camera 14 or the external camera 34 is not input to the RAM 13, the substitute processing (S 40) determines whether the latest still image stored in the RAM 13 is stored as shown in FIG. The image (fixed image) stored in advance in the ROM 12 is stored in the internal memory 16 as an image captured by the main camera 14 or the external camera 34. That is, when no still image is input within a predetermined number of times, the latest still image is stored as shown in FIG. 5A. As shown, a fixed image will be stored.

The characteristic operational effects of the present embodiment described above will be described below.
When the video input is interrupted, the drive recorder 1 of the present embodiment stores a substitute image (the most recent still image or fixed image) as the video of the camera where the video input is interrupted until the video is re-input. (S46, S48), it is suppressed that the storage time of the video of the camera in which the input is interrupted is shorter than the storage time of the video of the camera in which the input is not interrupted.

  Therefore, the drive recorder 1 according to the present embodiment allows the video input from the cameras 14 and 34 to be reproduced in a state in which the time shift is suppressed even when the input from the main camera 14 or the external camera 34 is interrupted. Can be stored.

  As shown in FIG. 2B, the drive recorder 1 of the present embodiment forms a still image group by associating the still images of the main camera 14 and the external camera 34 at predetermined timings, and at each timing. Still image groups are stored in the internal memory 16 in chronological order.

  In this way, a plurality of still images having the same shooting timing are collected, and the grouped still images are arranged in time series. Then, when playing back images from each camera, still images taken at the same timing are played back simultaneously.

  Therefore, when the drive recorder 1 of the present embodiment is used, the video captured by each camera can be reproduced in synchronization with each other. Therefore, for example, when used for accident verification, it is possible to accurately grasp the situation.

The drive recorder 1 according to the present embodiment stores not only the still images of the main camera 14 and the internal memory 16 but also traveling information indicating the traveling state of the vehicle at the same time.
In this way, it is possible to grasp an accurate running state when each still image group is being reproduced.

  The drive recorder 1 of the present embodiment stores, as a substitute image, an image immediately before the video input is interrupted for a predetermined period after the video input from the main camera 14 or the external camera 34 is interrupted (S48).

  In this way, when playing back each video, the most recent image is displayed for the video where the input was interrupted, so the current time in the direction of shooting with the camera where the input was interrupted during the time when the input was interrupted The approximate situation can be grasped.

The correspondence between the configuration of the present embodiment and the configuration of the present invention will be described.
The drive recorder 1 of this embodiment corresponds to the video storage device of the present invention. The internal memory 16 of this embodiment corresponds to a storage unit of the present invention. The central control device 10 of this embodiment corresponds to a storage control unit of the present invention.

The images stored in the internal memory 16 in S46 and S48 of this embodiment correspond to the substitute image of the present invention.
The interface device 17 of this embodiment corresponds to the information input unit of the present invention.
[Other Embodiments]
Although the embodiment has been described above, it is needless to say that the invention described in the claims is not limited to the above embodiment and can take various forms.

(1) In the above embodiment, still images, travel information, and the like are stored in the internal memory 16, but may be stored in, for example, an external memory.
(2) In the above embodiment, an example in which images taken by two front and rear cameras are stored has been described. However, three or more cameras may be used.

(3) In the above embodiment, the rear camera device 3 attached together with the drive recorder 1 is described as a camera for photographing the rear of the vehicle. However, a backward camera may be used.
(4) In the above-described embodiment, the example in which the drive recorder 1 and the rear camera device 3 are connected so as to be communicable by wire has been described, but these may be communicable wirelessly.

(5) In the above embodiment, the fixed image stored in the ROM 12 is not specified, but any image such as a black image may be used.
(6) In the above embodiment, when the input of a still image is interrupted, the most recent still image or a previously stored image is stored. However, when frame interpolation is possible, frame interpolation is executed for the interrupted still image. You may do it.

  (7) Although not specifically described in the above embodiment, for example, when the video shot by the external camera 34 and the video shot by the front camera 14 are displayed side by side on the same screen, the left and right are reversed. If it is difficult to confirm, the image captured by the external camera 34 may be reversed left and right.

If the camera is mounted upside down and the captured image is upside down, it may be rotated 180 degrees and stored in the internal memory 16.
(8) In the above embodiment, the front camera 14 and the external camera 34 shoot at the same frame rate, but the frame rate of one camera may be an integral multiple of the other camera. In that case, a still image of a camera with a high frame rate may be stored every time, and a still image of a camera with a low frame rate may be stored only when it is input to the internal memory 16 (that is, it occurs several times). You may make it memorize.

  (9) In the above embodiment, an example in which still images captured by the front camera 14 and the external camera 34 are recorded one by one in the internal memory 16 has been described. However, a difference image may be stored.

  (10) In the above embodiment, as shown in FIG. 2 (b), the image data of the front camera 14, the image data of the external camera 34, and the traveling information are included in the frame when stored in the internal memory 16. However, more information may be stored in the frame.

  (11) In the above embodiment, as shown in FIG. 5, when the input of a still image is interrupted, the most recent still image or a previously stored image is stored, but the input of the still image is interrupted. The data shown may be stored. In this case, there is a case where there is no still image data to be displayed at the time of playback. In this case, if the playback side does not make an error and the image is not displayed, the playback can be performed without time lag. Can do.

(12) In the above embodiment, one still image sent from each of the cameras 14 and 34 is stored in one frame.
On the other hand, H. In the case of using H.264 or another compression technique, the video captured by the cameras 14 and 34 may be stored as follows.

  For example, H.M. When the compression technique of 246 is used, still images for a predetermined time taken by the cameras 14 and 34 are temporarily stored in the RAM 13 of the central controller 10 in time series. The selected still image among the plurality of still images stored in the RAM 13 of the cameras 14 and 34 is set as an intra frame (I frame), and is a still image subsequent to the I frame up to the next I frame. These still images are compressed into B frames or P frames. Next, the I frame and a group of image data related to the B frame and the P frame are sent to the internal memory 16, and the group of image data of each camera 14, 34 is stored as one frame. Then, the frames having such a group of image data may be stored in the internal memory 16 in chronological order.

In addition, even when not using the compression technique, a plurality of still images of the cameras 14 and 34 may be stored in one frame.
As for the travel information, a plurality of travel information obtained during the I frame may be recorded as a group of image data, or representative travel information (which may be an average value or the like) is recorded in the frame. You may do it.

  Further, when the input of still images from the cameras 14 and 34 is interrupted, a substitute image may be stored instead of storing the still image in the RAM 13 and compressed together with the substitute image. A method may be used.

  (13) Each component of the present invention is conceptual and is not limited to the above embodiment. For example, the functions of one component may be distributed to a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment.

DESCRIPTION OF SYMBOLS 1 ... Drive recorder, 3 ... Back camera apparatus, 5 ... Travel information provision apparatus,
10 ... Central control unit, 11 ... CPU, 12 ... ROM, 13 ... RAM,
14 ... main body camera, 15 ... acceleration sensor, 16 ... internal memory,
17 ... interface device, 18 ... display,
30 ... Central control unit, 31 ... CPU, 32 ... ROM, 33 ... RAM, 34 ... External camera,
37. Interface device.

Claims (8)

A storage unit for storing respective images input from a plurality of cameras;
And a storage control unit that stores an alternative image in the storage unit as the video of the camera in which the video input is interrupted until the video is re-input when the video input is interrupted. Each video consists of a plurality of still images taken at a predetermined frame rate,
The storage unit
The video storage according to claim 1, wherein the still images input from the cameras are associated with each other at a predetermined timing to form a still image group, and the still image groups formed at each timing are stored in chronological order. apparatus. An information input unit for inputting driving information indicating a driving state of the vehicle;
The storage unit
The video storage device according to claim 2, wherein the travel information is also stored for each still image group. An information input unit for inputting driving information indicating a driving state of the vehicle;
The storage unit
The video storage device according to claim 1, wherein the running information is stored together with each of the videos. The storage control unit
The video storage device according to any one of claims 1 to 4, wherein an image immediately before video input is interrupted for a predetermined time after video input is interrupted is stored in the storage unit as the substitute image. The storage control unit
The video storage device according to claim 5, wherein a fixed image prepared in advance is stored in the storage unit as the substitute image after a predetermined time has elapsed since the video input was interrupted. A main body camera which is the camera combined with the storage unit and the storage control unit;
An interface unit for inputting video sent from an external camera which is a separate camera from the storage unit and the storage control unit;
The video storage device according to claim 1, further comprising: The storage control unit
The video storage device according to any one of claims 1 to 7, wherein frame interpolation is performed when interruption of input of the video that can be performed with frame interpolation occurs.