JP2020004223A - On-vehicle video recording device and control method thereof - Google Patents

Abstract

To provide an on-vehicle video recording device capable of preventing recorded video from being falsified or deleted, and a control method thereof.SOLUTION: An on-vehicle video recording device according to one embodiment of the present invention comprises: a first storage unit in which an access to recorded data is not limited, and which is a non-volatile memory where an image of a periphery of a vehicle is recorded; a second storage unit in which an access to the recorded data is permitted only when predetermined authentication processing is performed, and which is a built-in non-volatile memory where video is recorded; and a recording control unit which determines that an event related to a change in a behavior of a vehicle has occurred when a magnitude of a physical quantity output from a sensor which measures a physical quantity representing the change in the behavior of the vehicle has exceeded a first threshold, and records a video including an image at a time of the occurrence of the event in the first storage unit and the second storage unit.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an in-vehicle video recording device and a control method thereof.

  Conventionally, a drive recorder mainly mounted on a special vehicle such as a large vehicle or a police car has recently become popular in general vehicles. A general drive recorder is equipped with a camera and sensors such as an acceleration sensor, and captures an image of the surroundings of a running vehicle. When an event such as an accident is detected, the image at the time of the event occurrence is measured by the sensor. Record with. Thus, when an event such as an accident occurs, the cause of the accident is specified by analyzing the image recorded on the drive recorder and the information of the measurement value of the sensor.

  For example, the display control system of Patent Literature 1 displays a video at the time of occurrence of an event recorded by a drive recorder mounted on a vehicle with a plurality of thumbnail images, thereby making it easy to grasp the situation at the time of occurrence of the event. It is possible to identify the cause of the accident at an early stage.

JP 2013-235395 A

  In some cases, a video that is disadvantageous to a driver or another party is recorded on the drive recorder. Therefore, if the party views the video recorded on the drive recorder and determines that the video is disadvantageous to him, the party alters or deletes the video to eliminate evidence, May be removed.

  Accordingly, an object of the present invention is to provide an in-vehicle video recording device capable of preventing recorded video from being falsified or deleted, and a control method thereof.

  An in-vehicle video recording device according to an embodiment of the present invention is a non-volatile memory in which a video of a periphery of a vehicle is recorded, wherein a first storage unit in which access to the recorded data is not restricted, A second storage unit, which is a built-in nonvolatile memory to be recorded, in which access to the recorded data is permitted only when a predetermined authentication process is performed, and a physical quantity representing a change in behavior of the vehicle. When the magnitude of the physical quantity output from the sensor to be measured exceeds the first threshold value, it is determined that an event related to a change in the behavior of the vehicle has occurred, and the video including the image at the time of the event occurrence is stored in the first storage unit and the second storage unit. And a recording control unit for recording in the two storage units.

  A method for controlling an in-vehicle video recording device according to one embodiment of the present invention includes a non-volatile memory in which a video of a periphery of a vehicle is recorded, wherein a first storage unit in which access to the recorded data is not restricted is provided. A second storage unit, which is a built-in non-volatile memory in which a video is recorded and in which access to the recorded data is permitted only when a predetermined authentication process is performed. It is determined that an event related to the change in the behavior of the vehicle has occurred when the magnitude of the physical quantity output from the sensor that measures the physical quantity representing the change in the behavior of the vehicle has exceeded the first threshold value, Recording a video including an image at the time of the event occurrence in the first storage unit and the second storage unit.

  According to the present invention, there is provided an in-vehicle video recording apparatus capable of preventing recorded video from being falsified or deleted, and a control method thereof.

FIG. 2 is a diagram illustrating a state where a vehicle 2 equipped with the in-vehicle video recording device 1 according to the first embodiment is traveling on a road. It is a figure showing a situation when an event occurs in a vehicle 2 equipped with an in-vehicle video recording device 1 according to the first embodiment. 1 is a block diagram illustrating a configuration of an in-vehicle video recording device according to a first embodiment. 5 is a flowchart illustrating an example of a recording control process in the in-vehicle video recording device according to the first embodiment. 5 is a flowchart illustrating an example of an authentication process for accessing a second storage unit in the in-vehicle video recording device according to the first embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and can be appropriately changed without departing from the gist of the present invention. In each drawing, components having the same or corresponding functions are denoted by the same reference numerals, and description thereof may be omitted or simplified.

  The in-vehicle video recording device of the present invention, when detecting that an event such as a sudden braking, a sudden steering wheel, or a collision has occurred in the vehicle, records a video including an image at the time of the event occurrence in the first storage unit and the second storage unit. . Here, the first storage unit is a nonvolatile memory in which access to the recorded data is not particularly limited, and the second storage unit is configured to access the recorded data only when a predetermined authentication process is performed. This is a permitted built-in nonvolatile memory. The authentication process for accessing the video recorded in the second storage unit is disclosed only to a special person such as police, and is not disclosed to parties such as a driver. Therefore, in the in-vehicle video recording apparatus of the present invention, the video recorded in the second storage unit is prevented from being falsified or deleted by a party or the like.

[First Embodiment]
FIG. 1 is a diagram illustrating a state where a vehicle 2 equipped with an in-vehicle video recording device 1 according to the first embodiment is traveling on a road. FIG. 2 is a diagram illustrating a state when an event occurs in the vehicle 2 equipped with the in-vehicle video recording device 1 according to the first embodiment. The configuration and the like of the in-vehicle video recording device 1 will be described in detail later with reference to FIG.

  As shown in FIG. 1, the vehicle-mounted video recording device 1 is mounted on a vehicle 2. The in-vehicle video recording device 1 includes an imaging device such as a camera that captures an image of the periphery of the running vehicle 2 and a sensor such as an acceleration sensor that measures a physical quantity generated in the vehicle 2 due to sudden braking, sudden steering, collision, or the like. Is provided. The in-vehicle video recording device 1 temporarily stores an image around the traveling vehicle 2 captured by the imaging device in a main storage memory such as a DRAM mounted on a substrate of the in-vehicle video recording device 1.

  As shown in FIG. 2, when the vehicle 2 collides with the preceding vehicle 3, the in-vehicle video recording device 1 detects that an event has occurred in the vehicle 2 based on the magnitude of the physical quantity measured by the sensor. When detecting that an event has occurred in the vehicle 2, the in-vehicle video recording device 1 is a non-volatile memory included in the in-vehicle video recording device 1, which stores a video including an image at the time of the event occurrence held in the main storage memory. The information is recorded in the first storage unit and the second storage unit.

  FIG. 3 is a block diagram showing a configuration of the in-vehicle video recording device 1 according to the first embodiment. The in-vehicle video recording device 1 includes a main storage memory 10, a first storage unit 11, a second storage unit 12, an imaging device 13, a sensor 14, a positioning unit 15, a communication unit 16, an operation button 17, a display unit 18, and a control unit. 19.

  The main storage memory 10 is a volatile memory such as a DRAM (Dynamic Random-Access Memory) mounted on the substrate of the in-vehicle video recording device 1. The main storage memory 10 temporarily stores an image captured by the imaging device 13.

  The first storage unit 11 is a non-volatile memory in which access to data such as recorded images by a party such as a driver such as browsing and deletion is not particularly limited. As the first storage unit 11, for example, an SD card, a USB memory, or the like used in a general drive recorder can be used. The first storage unit 11 may be a removable medium that can be removed from the vehicle-mounted video recording device 1. Thereby, the user can carry the video recorded in the first storage unit 11.

  The second storage unit 12 is a non-volatile memory that restricts access such as browsing and deletion of data such as recorded video, and performs browsing of recorded data only when a predetermined authentication process is performed. And access such as deletion. This predetermined authentication process is determined by the control unit 19. The predetermined authentication process is not disclosed to the driver or the like, but is disclosed only to the police or a special person who requests the cooperation from the police and performs the predetermined authentication process. Therefore, in the in-vehicle video recording device 1 of the present embodiment, the video recorded in the second storage unit 12 is prevented from being falsified or deleted by a party or the like.

  In addition, the second storage unit 12 is built in the housing of the vehicle-mounted video recording device 1 so that its existence is hidden. For this reason, a driver or the like cannot know the existence of the second storage unit 12, and therefore, in the in-vehicle video recording device 1 of the present embodiment, the video stored in the second storage unit 12 It is prevented from being taken away. For this purpose, for example, the second storage unit 12 can be a memory circuit such as a flash memory mounted on a substrate in a housing of the vehicle-mounted video recording device 1.

  Since the second storage unit 12 is built in the housing of the in-vehicle video recording device 1, its storage capacity is usually smaller than that of the first storage unit 11. However, the present embodiment is not limited to this, and the storage capacity of the second storage unit 12 may be equal to or greater than the storage capacity of the first storage unit 11.

  The imaging device 13 captures a video around the running vehicle 2 and outputs the captured video to the control unit 19. The imaging device 13 can be, for example, a camera included in a general drive recorder. Note that the in-vehicle video recording device 1 may not have the imaging device 13. In this case, the imaging device 13 can be a driving support camera provided in the vehicle 2. The imaging device 13 may be disposed outside the vehicle-mounted video recording device 1. For example, the imaging device 13 is disposed at a position where it is easy to capture a video in front of the vehicle 2, and the captured image is transmitted to the control unit 19 via wireless or wired communication. May be output.

  The sensor 14 measures a physical quantity such as an acceleration and an angular velocity generated in the vehicle 2 and outputs the measured physical quantity to the control unit 19. The sensor 14 can be, for example, an acceleration sensor included in a general drive recorder. Note that the in-vehicle video recording device 1 may not have the sensor 14. In this case, the sensor 14 can be an acceleration sensor or an angular velocity sensor provided in the vehicle 2. The sensor 14 may be disposed outside the in-vehicle video recording device 1. For example, the sensor 14 is disposed in front of the vehicle 2 where an impact due to a collision or the like is easily sensed, and measures a measured physical quantity such as acceleration or angular velocity. The information may be output to the control unit 19 via an ECU (Electronic Control Unit).

  The positioning unit 15 acquires the current position of the vehicle 2 and outputs the current position to the control unit 19. As the positioning unit 15, for example, a GPS (Global Positioning System) receiver is used.

  The communication unit 16 is used as one of means for performing an authentication process for accessing a video recorded in the second storage unit 12, and includes an interface for receiving an authentication signal for performing the authentication process from an external device. provide. The authentication signal received via communication unit 16 is output to control unit 19. The communication unit 16 may be a communication interface circuit generally provided in a drive recorder, and may be, for example, a serial communication interface circuit. Thus, the user can perform an authentication process for accessing a video recorded in the second storage unit 12 via the communication unit 16 generally provided in the drive recorder.

  The operation button 17 is used as one of means for performing an authentication process for accessing a video recorded in the second storage unit 12, and provides an interface for a user to perform an operation for performing the authentication process. The operation performed on the operation button 17 by the user is output to the control unit 19. The operation buttons 17 may be hard buttons generally provided in the drive recorder, and may be, for example, a power button and up / down / left / right direction buttons included in the vehicle-mounted video recording device 1. Thus, the user can perform an authentication process for accessing a video recorded in the second storage unit 12 by using the operation buttons 17 generally provided in the drive recorder.

  The display unit 18 is a display device such as a liquid crystal display, and is used to reproduce and display images recorded in the first storage unit 11 and the second storage unit 12. For example, when the user operates a play button, which is one of the operation buttons 17, the control unit 19 reads the video recorded in the first storage unit 11, reproduces the video on the display unit 18, and displays the video. Further, after access to the video recorded in the second storage unit 12 is permitted by the access authentication unit 192 described later, the control unit 19 reads the video recorded in the second storage unit 12 and Play back and display.

  The control unit 19 is a processor such as a CPU (Central Processing Unit), and executes a program for control and calculation performed by the vehicle-mounted video recording device 1. The control unit 19 includes a recording control unit 191 and an access authentication unit 192. The recording control unit 191 and the access authentication unit 192 can be, for example, a software module or firmware executed by the control unit 19.

  Hereinafter, the operation of the recording control unit 191 and the access authentication unit 192 will be described with reference to the flowcharts of FIGS.

  FIG. 4 is a flowchart illustrating an example of a recording control process in the in-vehicle video recording device 1 according to the first embodiment. The recording control process shown in FIG. 4 is executed at regular processing intervals, for example, after the in-vehicle video recording device 1 is started or after the vehicle 2 starts running.

  The recording control unit 191 stores the video around the vehicle 2 captured by the imaging device 13 in the main storage memory 10 (Step S11). At this time, the in-vehicle video recording device 1 uses, for example, the main storage memory 10 as a ring buffer so that the old video is overwritten by the new video, and the video from at least a certain period before the current time is stored in the main storage memory. 10.

  Next, the recording control unit 191 determines whether or not the magnitude of the physical quantity indicating the change in the behavior of the vehicle 2 measured by the sensor 14 exceeds the first threshold (Step S12). Here, the physical quantity representing the change in the behavior of the vehicle 2 can be, for example, the acceleration generated in the vehicle 2 or the angular velocity of the vehicle 2 such as the yaw angle, the pitch angle, and the roll angle. As a result, for example, events such as sudden braking, sudden steering, and collision related to a change in the behavior of the vehicle 2 are detected. When the magnitude of the physical quantity of the vehicle 2 measured by the sensor 14 is equal to or smaller than the first threshold (Step S12: No), the recording control unit 191 determines that no event has occurred in the vehicle 2, and Is completed. The first threshold is set, for example, for each type of physical quantity measured by the sensor 14 based on a measurement performed in advance.

  On the other hand, when the magnitude of the physical quantity of the vehicle 2 measured by the sensor 14 exceeds the first threshold (Step S12: Yes), the recording control unit 191 determines that an event has occurred in the vehicle 2. When detecting that the event has occurred in the vehicle 2, the recording control unit 191 records the video of a certain period immediately before the event occurrence held in the main storage memory 10 in the first storage unit 11 (Step S <b> 13). Subsequently, the recording control unit 191 similarly records the video captured in a certain period immediately after the event occurrence in the first storage unit 11.

  At this time, the recording control unit 191 compares the measured values of physical quantities such as acceleration or angular velocity indicating a change in behavior of the vehicle 2 before and after the event measured by the sensor 14 and the position of the vehicle 2 acquired by the positioning unit 15. May be similarly recorded in the first storage unit 11.

  Next, the recording control unit 191 determines whether the magnitude of the physical quantity of the vehicle 2 measured by the sensor 14 exceeds a second threshold larger than the first threshold (Step S14). The second threshold is set for each type of physical quantity measured by the sensor 14 based on the measurement performed in advance, similarly to the first threshold. For example, the second threshold value is set to a value substantially equal to a measurement value measured by the sensor 14 when the vehicle 2 collides.

  When the magnitude of the measured value of the physical quantity does not exceed the second threshold (Step S14: No), the recording control unit 191 determines that the degree of the event that has occurred is not serious from the viewpoint of the measured value of the physical quantity. Judge. However, the recording control unit 191 determines the degree of an event that has occurred from other viewpoints.

  For example, the recording control unit 191 determines the degree of an event that has occurred by analyzing the video. In the present embodiment, the recording control unit 191 determines whether or not the information change amount of the video at the time of the event occurrence exceeds a predetermined amount (Step S15). As is well known in the analysis of encoded video, a sudden increase in the amount of information of a video at a certain time means that a large change has occurred in the video at that time. For example, in a situation where the vehicle 2 collides with the front vehicle 3 as shown in FIG. 2, the shape and size of the front vehicle 3 change due to a collision or the like, and a fire or smoke occurs in the front vehicle 3 and the front vehicle 3 For example, the color of No. 3 changes, and the information amount of the video sharply increases. Therefore, the recording control unit 191 can estimate the degree of the event that has occurred by determining whether the information change amount of the video at the time of the event occurrence exceeds a predetermined amount. Here, the predetermined amount to be compared with the information change amount of the video is set based on the measurement performed in advance.

  More specifically, the recording control unit 191 first performs a motion search between the current frame image and the previous frame image for each frame image constituting the captured video at the time of the event. Then, the recording control unit 191 generates a difference image in which the absolute value of the difference between the pixel value of the current frame image after the motion compensation and the pixel value of the previous frame image is set as a pixel value, and generates each pixel value of the generated difference image. Is the information change amount of the frame image. For this inter-frame prediction, for example, a technique of a P-frame (Predicted Frame) in which inter-frame prediction is performed using only forward prediction used in MPEG (Moving Picture Experts Group) can be used. The recording control unit 191 performs the determination in step S15 using the information change amount of the frame image forming the video as the information change amount of the video.

  When the information change amount of the video at the time of the event occurrence does not exceed the predetermined amount (Step S15: No), the recording control unit 191 determines that the degree of the generated event is not serious even by analyzing the video. Is determined, and the recording control processing in this processing cycle ends.

  On the other hand, when the information change amount of the video when the event occurs exceeds a predetermined amount (step S15: Yes), or when the measured value of the physical quantity exceeds the second threshold (step S14: Yes) The recording control unit 191 determines that the degree of the event that has occurred is serious. Then, the recording control unit 191 determines whether or not the remaining storage capacity exists in the second storage unit 12 in order to record the video in the second storage unit 12 (Step S16).

  If there is no remaining storage capacity in the second storage unit 12 (step S16: No), the recording control unit 191 determines that the video having a lower priority than the video to be stored in the second storage unit 12 Is determined (step S17). This priority is calculated, for example, as a value proportional to the maximum value of the physical quantity measured by the sensor 14 during the period in which the video is being captured, and is recorded in the second storage unit 12 together with the corresponding video.

  When an image with a lower priority exists in the second storage unit 12 (step S17: Yes), the recording control unit 191 permits overwriting of an image with a lower priority (step S18). On the other hand, when the lower priority video does not exist in the second storage unit 12 (Step S17: No), the recording control unit 191 does not record the video in the second storage unit 12 and performs the recording control process in this processing cycle. To end.

  When the overwriting of the low-priority video is permitted, or when the remaining storage capacity exists in the second storage unit 12 (Step S16: Yes), the recording control unit 191 generates the event stored in the main storage memory 10. The video for a certain period immediately before is recorded in the second storage unit 12 (step S19). Subsequently, the recording control unit 191 similarly records the video captured in a certain period immediately after the event occurrence in the second storage unit 12. Then, the recording control unit 191 ends the recording control processing in this processing cycle.

  At this time, the recording control unit 191 compares the measured values of physical quantities such as acceleration or angular velocity indicating a change in behavior of the vehicle 2 before and after the event measured by the sensor 14 and the position of the vehicle 2 acquired by the positioning unit 15. May be similarly stored in the second storage unit 12.

  If the storage capacity of the second storage unit 12 is equal to or greater than the storage capacity of the first storage unit 11, in step S13, the recording control unit 191 stores the video at the time of occurrence of the event in the first storage unit 11 and The information may be recorded in both of the second storage units 12. In this case, the processing after step S14 is omitted.

  If the storage capacity of the second storage unit 12 is equal to or greater than the storage capacity of the first storage unit 11, the recording control unit 191 applies the processing from step S16 to the first storage unit 11. You may.

  FIG. 5 is a flowchart illustrating an example of an authentication process for accessing the second storage unit 12 in the in-vehicle video recording device 1 according to the first embodiment. The authentication processing illustrated in FIG. 5 is executed, for example, after the power of the vehicle-mounted video recording device 1 is turned on and the vehicle-mounted video recording device 1 is started. At this time, the vehicle-mounted video recording device 1 may be left mounted on the vehicle 2 or may be removed from the vehicle 2.

  When the in-vehicle video recording device 1 is activated (step S21), the access authentication unit 192 determines whether or not a certain period has elapsed since the in-vehicle video recording device 1 was activated (step S22). If a certain period has elapsed since the start of the in-vehicle video recording device 1 (step S22: Yes), the access authentication unit 192 ends the authentication processing. In this way, by limiting the authentication process for accessing the second storage unit 12 to a certain period after the in-vehicle video recording device 1 is started, it is possible to prevent the authentication process from being performed accidentally. You.

  On the other hand, if the certain period has not elapsed since the start of the in-vehicle video recording device 1 (step S22: No), the access authentication unit 192 determines whether or not an authentication process has been performed (step S23). For example, the access authentication unit 192 determines that the authentication process has been performed when the plurality of operation buttons 17 are operated in a predetermined order or combination. Alternatively, the access authentication unit 192 determines that the authentication process has been performed when a predetermined authentication signal is received via the communication unit 16. Thus, the user can perform an authentication process for accessing the video recorded in the second storage unit 12 using the operation buttons 17 generally provided in the drive recorder or via the communication unit 16. it can.

  When the authentication process is not performed (Step S23: No), the access authentication unit 192 repeats Steps S22 to S23 until a certain period elapses after the in-vehicle video recording device 1 starts.

  On the other hand, when the authentication processing has been performed (Step S23: Yes), the access authentication unit 192 permits access to the second storage unit 12 (Step S24). Then, the access authentication unit 192 displays on the display unit 18 that access to the second storage unit 12 has been permitted. At this time, the access authentication unit 192 may display a list of videos recorded in the second storage unit 12 on the display unit 18.

  As described above, when the vehicle-mounted video recording device of the present embodiment detects that an event such as a sudden brake, a sudden steering wheel, or a collision has occurred in the vehicle, the video including the image at the time of the event occurrence is stored in the first storage unit and the second storage unit. 2 Record in the storage unit. Here, the first storage unit is a nonvolatile memory in which access to the recorded data is not particularly limited, and the second storage unit is configured to access the recorded data only when a predetermined authentication process is performed. This is a permitted built-in nonvolatile memory. The authentication process for accessing the video recorded in the second storage unit is disclosed only to a special person such as police, and is not disclosed to parties such as a driver. Therefore, in the in-vehicle video recording device of the present embodiment, the video recorded in the second storage unit is prevented from being falsified or deleted by a party or the like.

  Further, since the video at the time of the event occurrence is duplicated and recorded in the first storage unit and the second storage unit, the video is left in the second storage unit even if the first storage unit is removed or damaged. . Therefore, loss of the video at the time of the event occurrence is prevented.

  Each of the above-described embodiments is merely an example of a specific embodiment for carrying out the present invention, and the technical scope of the present invention should not be interpreted in a limited manner. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features.

Reference Signs List 1 vehicle 2 in-vehicle video recording device 3 forward vehicle 10 main storage memory 11 first storage unit 12 second storage unit 13 imaging device 14 sensor 15 positioning unit 16 communication unit 17 operation button 18 display unit 19 control unit 191 recording control unit 192 access Authentication department

Claims (8)

A first storage unit, which is a non-volatile memory in which an image of a periphery of the vehicle is recorded, wherein access to the recorded data is not restricted;
A second storage unit which is a built-in non-volatile memory in which the video is recorded, and which is permitted to access the recorded data only when a predetermined authentication process is performed;
When the magnitude of the physical quantity output from the sensor that measures the physical quantity representing the change in the behavior of the vehicle exceeds a first threshold, it is determined that an event related to the change in the behavior of the vehicle has occurred. A recording control unit that records the video including the image of the first storage unit and the second storage unit;
An in-vehicle video recording device comprising: The first storage unit is detachable from the in-vehicle video recording device,
The second storage unit is a memory circuit mounted on a substrate in a housing of the in-vehicle video recording device.
The in-vehicle video recording device according to claim 1. Multiple operation buttons,
An access authentication unit that determines that the authentication process has been performed when the operation buttons are operated in a predetermined order or combination,
The in-vehicle video recording device according to claim 1 or 2, further comprising: A communication unit for communicating with an external device;
When receiving a predetermined authentication signal via the communication unit, an access authentication unit that determines that the authentication process has been performed,
The in-vehicle video recording device according to claim 1 or 2, further comprising: The access authentication unit, for a predetermined period after the in-vehicle video recording device is started, to determine the authentication process,
The vehicle-mounted video recording device according to claim 3. The recording control unit,
When the magnitude of the measured value of the physical quantity exceeds a second threshold larger than the first threshold, the video is recorded in the first storage unit and the second storage unit,
When the magnitude of the measured value of the physical quantity exceeds the first threshold and is equal to or less than the second threshold, the video is recorded in the first storage unit.
An in-vehicle video recording device according to any one of claims 1 to 5. The recording control unit,
When the information change amount of the video when an event occurs in the vehicle exceeds a predetermined amount, the video is recorded in the first storage unit and the second storage unit,
If the magnitude of the measured value of the physical quantity exceeds the first threshold, and the information change amount of the video is equal to or less than the predetermined amount, the video is recorded in the first storage unit.
An in-vehicle video recording device according to any one of claims 1 to 6. A first storage unit, which is a non-volatile memory in which an image of a periphery of the vehicle is recorded, wherein access to the recorded data is not restricted;
A second storage unit which is a built-in non-volatile memory in which the video is recorded, and which is permitted to access the recorded data only when a predetermined authentication process is performed;
A method for controlling an in-vehicle video recording device comprising:
When the magnitude of the physical quantity output from the sensor that measures the physical quantity representing the change in the behavior of the vehicle exceeds a first threshold, it is determined that an event related to the change in the behavior of the vehicle has occurred. A control method, comprising recording the video including an image in the first storage unit and the second storage unit.

Images