JP7156087B2 - Recording/playback device, recording/playback method and program - Google Patents

Description

The present invention relates to a recording/reproducing apparatus, a recording/reproducing method, and a program.

It has means for capturing data such as images by photographing the surroundings of the vehicle, and means for detecting that the vehicle has received some kind of impact. Drive recorders that store videos and the like in a reproducible manner have become widespread. For example, Patent Document 1 discloses a drive recorder that records video data based on changes in acceleration. When such a drive recorder detects an event such as an accident, the situation of the accident is reproducibly saved. Further, when abnormal acceleration is detected due to dangerous driving or the like, the drive recorder stores the situation of dangerous driving in a reproducible manner.

Japanese Patent Application Laid-Open No. 2009-087007

However, users of drive recorders often do not know how to operate the drive recorder. Also, when an event such as an accident occurs, the user cannot immediately perform complicated operations. As a result, the user may not be able to properly reproduce the video of the event saved by the drive recorder.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and provides a recording/reproducing apparatus and the like for reproducing stored data with a simple operation.

A recording/reproducing apparatus according to the present invention is installed in a mobile body and records and reproduces photographed data photographed by a camera, and includes a photographed data acquisition section, a device acceleration sensor, an event detection section, a recording control section, and a reproduction control section. has a part. The captured data acquisition unit acquires captured data. The acceleration information acquisition unit acquires device acceleration applied to the recording/reproducing device and mobile body acceleration applied to the mobile body. The event detection unit detects that an event has occurred with respect to the moving object. The recording control unit stores, as event record data, photographed data for a preset period from at least a part of the photographed data based on the detection of the event. After detecting the event recording data, the reproduction control unit starts reproducing the event recording data when it is detected that the device acceleration has changed to be greater than the moving body acceleration.

A recording/reproducing method according to the present invention is a recording/reproducing method in a recording/reproducing device installed in a mobile body for recording and reproducing photographed data photographed by a camera, comprising a photographed data acquisition step, an event detection step, a recording control step, and a playback control step. The imaging data acquisition step acquires imaging data. The event detection step detects that an event has occurred with respect to the moving object. The record control step stores, as event record data, photographed data for a preset period from at least part of the photographed data based on the detection of the event. The reproduction control step starts reproduction of the event record data after the event is detected and when it is detected that the device acceleration applied to the recording/reproducing device has changed to a state greater than the moving body acceleration applied to the moving body. do.

A program according to the present invention is a program to be executed by a computer that operates a recording/reproducing device that is installed in a mobile body and that records and reproduces photographed data photographed by a camera, and includes a photographed data acquisition step, an event detection step, and a recording control step. , and playback control steps. The imaging data acquisition step acquires imaging data. The event detection step detects that an event has occurred with respect to the moving object. The record control step stores, as event record data, photographed data for a preset period from at least part of the photographed data based on the detection of the event. The reproduction control step starts reproduction of the event record data after the event is detected and when it is detected that the device acceleration applied to the recording/reproducing device has changed to a state greater than the moving body acceleration applied to the moving body. do.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a recording/reproducing device or the like that reproduces stored data without complicated operations.

1 is a block diagram showing the configuration of a recording/reproducing apparatus according to Embodiment 1; FIG. 2 is a right side view of the recording/reproducing device according to the first embodiment; FIG. 2 is a rear view of the recording/reproducing device according to the first embodiment; FIG. 1 is a front view of a recording/reproducing device according to a first embodiment; FIG. FIG. 2 is a first diagram showing the relationship between photographed data stored in the recording/reproducing device and time. FIG. 4 is a second diagram showing the relationship between photographed data stored in the recording/reproducing device and time. 4 is a flow chart when the recording/reproducing device detects the occurrence of an event; 4 is a flow chart when the recording/reproducing device reproduces event record data. It is a figure which shows an example of the state which removes a recording/reproducing apparatus. 4 is a graph of acceleration showing reproduction conditions according to the first embodiment; 7 is a graph of acceleration showing reproduction conditions according to a modification of the first embodiment;

For clarity of explanation, the following descriptions and drawings are omitted and simplified as appropriate. In each drawing, the same elements are denoted by the same reference numerals, and redundant description is omitted as necessary.

<Embodiment 1>
The configuration of the first embodiment will be described below with reference to the drawings. A recording/reproducing apparatus 10 according to the present embodiment is used by being installed in a vehicle such as an automobile, which is a mobile object, and records and reproduces photographed data photographed by a camera. be. The recording/reproducing apparatus 10 has a function of reproducibly recording photographed data for a preset period of time as "event record data", triggered by a sudden impact or the like. ing. A driver of an automobile or the like can grasp the situation of the event by reproducing the event record data and watching the video of the reproduced event record data.

FIG. 1 is a block diagram showing the configuration of a recording/reproducing apparatus according to a first embodiment. As shown in the figure, the recording/reproducing apparatus 10 has a control unit 100 that controls each component and a plurality of components connected to the control unit 100 . The control unit 100 is a control device having a circuit board on which a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a memory, a plurality of interfaces, etc. are mounted. process.

Details of the control unit 100 will be described below. The control unit 100 includes a captured data acquisition unit 120, a buffer memory 121, a captured data processing unit 122, a recording control unit 123, a playback control unit 124, an operation control unit 125, a display control unit 126, an acceleration information acquisition unit 127, and a position information acquisition unit. It has a unit 128 and an event detection unit 130 , and the configuration for executing these processes and controls is realized by a program executed by the control unit 100 . For convenience, these configurations are expressed as if they are connected to the bus line 110 respectively.

The captured data acquisition unit 120 acquires captured data supplied from the camera 150 . The captured data acquisition unit 120 supplies captured data to the buffer memory 121 via the bus line 110 .

Buffer memory 121 is a volatile or non-volatile memory device. The buffer memory 121 sequentially receives photographed data periodically generated by the camera 150 via the photographed data acquisition unit 120 and temporarily stores the received photographed data. The shooting data temporarily stored in the buffer memory 121 is for a preset period. The buffer memory 121 sequentially erases photographed data that has passed a preset period, or sequentially overwrites newly received photographed data.

The photographed data processing unit 122 generates a photographed file having a format conforming to a preset method from the photographed data stored in the buffer memory 121 . The preset method is, for example, H.264. H.264 and MPEG-4 (Moving Picture Experts Group).

Note that the photographed data processing unit 122 may process the photographed data and generate a photographed file with a preset angle of view. Further, the photographed data processing unit 122 processes the photographed data output from the buffer memory 121, generates photographed data of a preset time or a preset angle of view, and adds header information such as a file name. may be used to generate a capture file. Further, the photographed data processing unit 122 may process the photographed data output from the buffer memory 121 and perform noise removal, distortion correction, and the like on the photographed data. A photographed file displaying information and the like may be generated.

The recording control unit 123 stores the captured file generated by the captured data processing unit 122 in the recording device 160 . When the event detection unit 130 detects an event, the recording control unit 123 stores the captured files for a period set in advance based on the detection of the event as overwrite-prohibited event recording data in the recording device 160 . The recording control unit 123 saves the event recording data in a predetermined recording area in the recording device 160 . A predetermined recording area is, for example, a recording area that is prohibited from being overwritten or erased. Alternatively, the event recording data supplied to the recording device 160 by the recording control unit 123 may be stored in a file including a flag indicating that overwriting or erasing is prohibited.

The recording control unit 123 also records, in the recording device 160, information indicating whether or not the event recording data saved in the recording device 160 has been reproduced by the reproduction control unit 124 in the past. Thereby, the reproduction control section 124 can identify which event record data has not been reproduced.

Note that, when the event detection unit 130 does not detect an event, the recording control unit 123 may cause the recording device 160 to store the photographed file in an overwritable state. A photographed file different from the event recording data, which is stored in the recording device 160, is called a "normal file" here. When the storage capacity of the recording device 160 reaches the upper limit, the recording control unit 123 may delete the old normal files and record the newly generated normal files in the recording device 160 .

The reproduction control unit 124 performs processing for reproducing the stored event recording data under preset conditions. The preset condition is after the detection of the event and when it is detected that the device acceleration has changed to be greater than the mobile body acceleration. In that case, the reproduction control unit 124 supplies the event recording data saved in the recording device 160 to the display control unit 126 in order to start reproducing the saved event recording data.

The operation control unit 125 acquires operation information received by the operation unit 140, and outputs operation instructions based on the operation information to each component. When the operation control unit 125 receives an instruction to select various data to be reproduced from the operation unit 140, the operation control unit 125 causes the reproduction control unit 124 to select a file or the like recorded in the recording device 160. FIG. When the operation control unit 125 acquires an instruction regarding reproduction of various data from the operation unit 140, the operation control unit 125 causes the reproduction control unit 124 to perform processing regarding reproduction. Instructions relating to reproduction of various data are, for example, reproduction start, pause, reproduction stop, enlarged display, and the like.

The display control unit 126 controls the display unit 141 to display various information. For example, the display control unit 126 causes the display unit 141 to display captured data being captured by the camera 150 . The display control unit 126 also receives the event recording data supplied from the reproduction control unit 124 and causes the display unit 141 to display the received event recording data. When a touch sensor is superimposed on the display unit 141 as a function of the operation unit 140, the display control unit 126 causes the display unit 141 to appropriately display an icon or the like corresponding to the touch sensor.

The acceleration information acquisition unit 127 receives information regarding acceleration detected by the device acceleration sensor 142 and the mobile body acceleration sensor, and outputs the information to the event detection unit. The acceleration information acquisition section 127 may output information about acceleration to the reproduction control section 124 .

The event detection unit 130 detects the occurrence of a predetermined event based on the information about acceleration acquired from the acceleration information acquisition unit 127 and from the signal magnitude and signal pattern of the received information. The device acceleration received from the outside is the acceleration received by the recording/reproducing device 10 from the outside of the recording/reproducing device, for example, the acceleration caused by the impact generated when the vehicle collides with another object. The acceleration received from the outside also includes impact directly received by the user or the like on the recording/reproducing apparatus 10 itself.

When the event detection unit 130 detects that the information received from the acceleration information acquisition unit 127 corresponds to the occurrence of a predetermined event, the event detection unit 130 supplies the captured data processing unit 122 with a signal indicating that the event has been detected. do. Occurrence of an event is, for example, a case where an acceleration caused by an accident is detected, such as an impact due to sudden braking or an impact when an object collides with the vehicle. For example, when acceleration exceeding a preset magnitude is detected in a preset direction for a preset period of time, or when the change in acceleration is large during a preset period of time. Secondly, the event detector 130 detects the occurrence of an event. The event detection unit 130 may detect acceleration along the X-, Y-, and Z-axes, which are coordinate axes of triaxial coordinates, or may detect acceleration in at least one of these directions. good too. Also, the acceleration received from these three axial directions may be weighted.

The event detection unit 130 may detect that an event has occurred based on detecting that the device acceleration and the mobile body acceleration received from the acceleration information acquisition unit 127 correspond to the occurrence of a predetermined event. Further, the event detection unit 130 may detect that an event has occurred based on detecting that the mobile acceleration received from the acceleration information acquisition unit 127 corresponds to the occurrence of a predetermined event.

A position information acquisition unit 128 receives signals from GPS satellites received by a GPS (Global Positioning System) reception unit 143, acquires position information that is information about the current position from the received signals, and controls recording of the acquired position information. 123. Location information includes, for example, the latitude and longitude of the vehicle at the time the signal was received from the GPS satellites.

Next, each configuration connected to the control unit 100 will be described. The recording/reproducing device 10 has an operation section 140 , a display section 141 , a device acceleration sensor 142 , a GPS receiving section 143 , a camera 150 , a recording device 160 and a communication section 170 .

The operation unit 140 is a user interface that receives operations performed by the user on the recording/reproducing device 10 . The user interface may be, for example, an operation button or a touch sensor superimposed on the display unit 141 . The user interface may be a receiver for infrared rays or wireless communication, and may receive signals transmitted from a remote controller or the like. The operation unit 140 supplies operation information, which is information about the received operation, to the control unit 100 via a predetermined interface. The operation information is, for example, an instruction to start event recording, an instruction to reproduce event recorded data, or the like.

The display unit 141 is a display device that displays various information under the control of the display control unit 126 . The display unit 141 has, for example, at least a display panel such as a liquid crystal panel or organic EL (Electro Luminescence). The display unit 141 is connected to the display control unit 126 and displays signals supplied from the display control unit 126 . The display unit 141 is configured to display the video included in the event record data.

The device acceleration sensor 142 is, for example, a triaxial acceleration sensor, and is installed at an arbitrary location on the recording/reproducing device 10 . The device acceleration sensor 142 detects acceleration applied to the device acceleration sensor 142, and supplies information on the detected acceleration to the control unit 100 according to the detected acceleration. The device acceleration sensor 142 is connected to the acceleration information acquisition section 127 and supplies information regarding the detected acceleration to the acceleration information acquisition section 127 . It should be noted that the state related to the device acceleration supplied from the device acceleration sensor 142 to the control unit 100 can be appropriately configured in another configuration. use the information. Note that the device acceleration sensor 142 may be a one-axis or two-axis acceleration sensor instead of the three-axis acceleration sensor.

A GPS receiver 143 receives information about the current position of the vehicle from a satellite positioning system called GPS or GNSS (Global Navigation Satellite System). The GPS receiver 143 may be an antenna for receiving GPS signals, or may be a communication interface for receiving position information acquired by the vehicle. The GPS reception unit 143 supplies the received signal regarding the current position to the position information acquisition unit 128 .

The camera 150 is an imaging device having an objective lens, an imaging element, an AD (Analog to Digital) conversion element, and the like. The camera 150 captures an image including the scenery around the vehicle, which is a moving object, and generates shooting data, which is data of the captured image. The camera 150 supplies the generated photographed data to the photographed data acquisition unit 120 .

The recording device 160 is a recording device that stores photographed data supplied from the camera 150 . The recording device 160 is, for example, a memory card including a flash memory, or a non-volatile recording device such as an SSD (Solid State Drive) or HDD (Hard Disc Drive). The recording device 160 is connected to the recording control section 123, receives predetermined data from the recording control section 123, and records the received data. In addition, the recording device 160 supplies an event file containing recorded event record data to the reproduction control section 124 in accordance with an instruction from the reproduction control section 124 . The recording device 160 may be configured to be removable from the recording/reproducing device 10, or may be configured to be non-removable.

The communication unit 170 receives information about acceleration detected by a moving body acceleration sensor (not shown) installed in the vehicle in which the recording/reproducing device 20 is installed, and outputs the information to the acceleration information acquisition unit 127 . The communication unit 170 may acquire information about the acceleration detected by the mobile acceleration sensor through wireless communication. Information about the detected acceleration may be obtained. Further, the communication unit 170 may communicate with a car navigation system installed in a mobile body and acquire mobile body acceleration information from an acceleration sensor included in the car navigation system.

Next, the mechanical configuration of the recording/reproducing apparatus 10 will be described with reference to FIGS. 2 to 4. FIG. FIG. 2 is a right side view of the recording/reproducing device 10 according to the first embodiment. FIG. 3 is a rear view of the recording/reproducing apparatus 10 according to the first embodiment as seen from the photographing direction. FIG. 4 is a front view of the recording/reproducing apparatus 10 according to the first embodiment viewed from the display direction. A right-handed orthogonal coordinate system is attached to FIGS. 2 to 4 and the X-, Y-, and Z-axis directions of these orthogonal coordinate systems are consistent with each other.

As shown in FIG. 2, the recording/reproducing device 10 is fixed to the windshield WS of the vehicle via a bracket 900. As shown in FIG. Bracket 900 has adhesive portion 901 , holding portion 902 and ball joint 903 .

The adhesive portion 901 is a member having an adhesive applied to the surface thereof in contact with the windshield WS. The bracket 900 is fixed by bonding the bonding portion 901 to an arbitrary position on the windshield WS.

The holding portion 902 is detachably fitted to the attachment/detachment portion 921 of the recording/reproducing device 10 so that the attached recording/reproducing device 10 does not come off when the vehicle runs or the like, or the photographing direction is not shifted. For example, the holding portion 902 has a rib or groove that can be slidably engaged in a predetermined direction of the attachment/detachment portion 921 of the recording/reproducing device 10, and when slid to a predetermined dimension, a lock mechanism (not shown) is engaged. ) is locked and fixed without rattling.

The ball joint 903 is a joint mechanism provided so as to be able to adjust the angle between the bonding portion 901 and the holding portion 902, and moves when a predetermined external force is applied. The ball joint 903 is configured not to move unless a predetermined external force is applied when the adhesive portion 901 is adhered to the windshield WS and the holding portion 902 is fitted to the recording/reproducing device 10 .

A user who uses the recording/reproducing device 10 adheres the adhesive portion 901 to the windshield and fits the attaching/detaching portion 921 of the recording/reproducing device 10 to the holding portion 902 . The recording/reproducing device 10 is thereby fixed to the vehicle.

When removing the recording/reproducing device 10 fixed to the vehicle, the user releases the attaching/detaching portion 921 of the recording/reproducing device 10 from the holding portion 902 . When releasing the detachable part 921 from the holding part 902 , the user releases the lock mechanism (not shown) and then slides the detachable part 921 away from the holding part 902 . As a result, the recording/reproducing device 10 is removed from the vehicle.

As shown in FIGS. 2 to 4, the recording/reproducing device 10 has a substantially rectangular parallelepiped shape with its front and back sides being rectangular main surfaces and having a thickness of about a fraction of the short sides of the rectangle projected from the front. constitutes The recording/reproducing device 10 is surrounded by a resin case 920 . The recording/reproducing apparatus 10 has a display panel of the display unit 141 on the front, an objective lens of the camera 150 exposed on the back, and a detachable unit 921 on the top. Therefore, in the recording/reproducing apparatus 10, the attachment/detachment portion 921 provided on the upper surface is fitted into the holding portion of the bracket 900, the objective lens of the camera 150 is exposed in the traveling direction of the vehicle, and the display panel of the display portion 141 is displayed by the driver. is arranged facing the user side. By installing the recording/reproducing device 10 in this way, the recording/reproducing device 10 captures an image in the traveling direction and displays the captured image to the user. The size of the display panel of the recording/reproducing device 10 is, for example, about 1.5 inches to 4 inches diagonally. Moreover, the size of the case 920 is, for example, about 5 cm to 10 cm in the width direction (X-axis direction).

As shown in FIG. 3, the recording/reproducing device 10 incorporates a device acceleration sensor 142 . Therefore, when the recording/reproducing device 10 is fixed to the vehicle by the bracket 900 , the device acceleration sensor 142 detects the acceleration received by the vehicle via the bracket 900 . The device acceleration sensor 142 also detects acceleration when the user removes or attaches the recording/reproducing device 10 to the bracket 900 or shakes or pushes the device.

Next, photographing data will be described with reference to FIG. FIG. 5 is a first diagram showing the relationship between photographed data stored in the recording/reproducing device and time. The horizontal axis of the figure represents time, and indicates that time elapses in the direction of the arrow (to the right) from time t10 toward time t11.

The elongated shape shown along the time axis is imaging data C11 at time t11. The photographed data C11 is photographed data generated by the camera 150 and stored in the buffer memory 121 . The recording/reproducing device 10 is set so as to always store photographed data for a preset period Pn. The period Pn is, for example, a period of 60 seconds, 120 seconds or 150 seconds. The photographed data C11 at time t11 is photographed data from time t10 to time t11, which is a period Pn before time t11. Further, the photographed data stored in the buffer memory 121 is sequentially erased from the photographed data past the period Pn as time elapses.

Here, in the example shown in FIG. 5, it is assumed that the recording/reproducing device 10 detects the occurrence of an event at time t11. Therefore, the recording/reproducing apparatus 10 thereafter performs processing for generating event recording data with reference to time t11.

Next, photographed data and event record data after detecting the occurrence of an event will be described with reference to FIG. FIG. 6 is a second diagram showing the relationship between photographed data stored in the recording/reproducing device and time. FIG. 6 shows the structure of data at time t21 after time t11. What is stored in the buffer memory 121 at time t21 is photographed data C21 from time t20 to time t21, which is a period Pn before time t21.

The rectangle shown below the shooting data C21 is the event recording data E11. The event record data E11 is extracted from the photographed data according to the event detected at time t11. In the present embodiment, the recording/reproducing apparatus 10 sets the start time of the event recording data to the time ts, which is the period P1 preceding the time t11 from the time t11 at which the event was detected. Further, in the present embodiment, the recording/reproducing apparatus 10 sets the time te after the period P2 based on the time t11 at which the event was detected as the end time of the event recording data. Period P1 and period P2 are periods such as 10 seconds, 15 seconds, or 20 seconds, for example. That is, the recording/reproducing device 10 saves the photographed data in the period from time ts to time te as event recording data E11.

By generating the event recording data as described above, the recording/reproducing device 10 can save the captured data for the period before and after the event that has occurred. Therefore, by reproducing the event recording data saved by the recording/reproducing device 10 after the event occurs, the user can visually recognize the situation around the vehicle before and after the event occurs.

Note that the recording/reproducing device 10 may record a normal file in the recording device 160 in addition to the event recording data. In this case, the recording/reproducing apparatus 10 extracts the photographed data for a predetermined period from the photographed data stored in the buffer memory 121 and records the extracted photographed data in the recording device 160 as a normal file. The recording/reproducing apparatus 10 may perform the process of recording the normal file and the process of saving the event record data in parallel.

Next, processing performed by the recording/reproducing device 10 will be described with reference to FIG. FIG. 7 is a flow chart when the recording/reproducing device detects the occurrence of an event. FIG. 7 shows processing performed by the control unit 100 when the recording/reproducing device 10 detects an event. The flowchart shown in FIG. 7 is started under arbitrary conditions, such as power being supplied from the vehicle to the recording/reproducing device 10 based on the start of operation of the vehicle.

First, the control unit 100 starts acquisition of shooting data (step S10). In step S10, the control unit 100 also starts event detection. Photographed data is supplied from the camera 150 periodically (for example, 30 frames per second). The photographed data acquisition unit 120 supplies the photographed data supplied from the camera 150 to the buffer memory 121 . The buffer memory 121 stores photographed data for a preset period (for example, 60 seconds), and after the photographed data for the preset period is stored, deletes old photographed data and sequentially stores new photographed data. .

Next, the event detection unit 130 determines whether or not the occurrence of an event has been detected from the acceleration information acquired by the acceleration information acquisition unit 127 (step S11). If it is determined that the occurrence of an event has been detected (step S11: Yes), the recording control unit 123 generates event recording data and stores it in the recording device 160 (step S12). On the other hand, if it is not determined that the occurrence of an event has been detected (step S11: No), the control section 100 does not generate event recording data, and proceeds to step S13.

Next, the control unit 100 determines whether or not to end the series of processes (step S13). The series of processes are processes such as terminating the operation of the vehicle and stopping the operation of the drive recorder. If it is not determined to end the process (step S13: No), the control unit 100 returns to step S11 and determines again whether or not the occurrence of an event has been detected. On the other hand, when determining to end the process (step S13: Yes), the control unit 100 ends the process.

Next, referring to FIG. 8, the event recording data reproduction process performed by the control unit 100 will be described. FIG. 8 is a flow chart when the recording/reproducing device reproduces event recorded data. The process of FIG. 8 is started when an event is detected in the process of FIG. 7 (step S11: Yes). The process of FIG. 8 may be started when event record data is saved in the process of FIG.

First, after the event is detected, the reproduction control unit 124 determines whether or not the conditions for reproducing the event record data are satisfied (step S110). The condition for reproducing the event record data is, for example, the case where it is detected that the device acceleration has changed to be greater than the mobile body acceleration.

Here, conditions for reproducing event record data will be described with reference to FIGS. 9 and 10. FIG. FIG. 9 is a diagram showing an example of a state in which the recording/reproducing device is removed. FIG. 9 shows a state in which the detachable portion 921 is released from the holding portion 902 by the user U holding the recording/reproducing device 10 with the left hand and pulling it in the direction of the arrow. The user U removes the recording/reproducing device 10 from the bracket 900 and grasps the recording/reproducing device 10 to view the display unit 141 in order to start reproducing the event record data.

As shown in FIG. 9, when the recording/reproducing device 10 is removed from the bracket 900, the user U holds the recording/reproducing device 10 and pulls it in the Y-axis negative direction. Further, as described above, the recording/reproducing device 10 is configured by integrating the display unit 141 and the device acceleration sensor 142 . Therefore, the recording/reproducing device 10 receives a predetermined acceleration from the outside.

FIG. 10 is a graph of acceleration showing reproduction conditions according to the first embodiment. FIG. 10 plots values of device acceleration and mobile body acceleration that change over time in the process of the user U removing the recording/reproducing device 10 in FIG. The horizontal axis of FIG. 10 indicates the time, and the vertical axis indicates the values of the device acceleration and the mobile body acceleration acquired by the acceleration information acquisition unit 127 . The device acceleration shown on the vertical axis indicates the attachment/detachment threshold Gth1 and the event threshold Gth2. The vertical axis in FIG. 10 indicates the absolute value of acceleration.

The attachment/detachment threshold value Gth1 is a threshold value for detecting acceleration received from the outside when the recording/reproducing device 10 is detached from the bracket 900 . That is, when the device acceleration exceeds the attachment/detachment threshold value Gth1, there is a possibility that the recording/reproducing device 10 has been removed from the bracket 900 . When detecting that the recording/reproducing device 10 has been removed from the bracket 900 based on the attachment/detachment threshold value Gth1 and the device acceleration, it is also possible to detect based only on the acceleration generated in the removal direction (minus Y direction) shown in FIG. good.

The event threshold Gth2 is a threshold for detecting the acceleration received by the recording/reproducing device 10 when a predetermined event such as collision with an object or another vehicle occurs in the vehicle. The event threshold Gth2 is a value greater than the attachment/detachment threshold Gth1. When the device acceleration exceeds the event threshold value Gth2, it can be determined that some event has occurred in the vehicle to which the recording/reproducing device 10 is attached. Further, when the mobile body acceleration exceeds the event threshold Gth2, or when both the device acceleration and the mobile body acceleration exceed the event threshold Gth2, it can be determined that some event has occurred in the vehicle. In this case, the recording/reproducing device 10 generates event recording data and saves an event file containing the generated event recording data in the recording device 160 .

In FIG. 10, a polygonal line LD1 indicates the value of device acceleration, and a polygonal line LC1 indicates the value of mobile body acceleration. Here, the acceleration at an arbitrary time is exemplified as one value, but the acceleration value may be a value obtained by summing or synthesizing the acceleration in each direction of the three axes, or the acceleration in each direction may be a predetermined value. A single value may be obtained by the calculation of . Further, the calculation may be performed by individually weighting each direction by a predetermined calculation.

From time t1 to time t2 shown in FIG. 10, the device acceleration changes from being smaller than the attachment/detachment threshold value Gth1 to being greater than the attachment/detachment threshold value Gth1, and the moving object acceleration hardly changes. In other words, the change in mobile acceleration is smaller than the change in device acceleration. In other words, the device acceleration has changed to be greater than the mobile body acceleration. Accordingly, at time t2, the reproduction control section 124 determines that the conditions for reproducing the event record data are met. In general, the acceleration caused by removal has a time width such as t1 to t4, as shown in FIG. For this reason, the reproduction control unit 124 determines that the condition for reproducing the event record data is established, and executes the process of starting the reproduction of the event record data after a predetermined period such as period P11 has elapsed. Alternatively, the reproduction control unit 124 may determine that the condition for reproducing the event record data is satisfied after the period P11 has passed since the device acceleration changed to be greater than the mobile body acceleration.

Returning to FIG. 8, the description continues. In step S110 of FIG. 8, if it is not determined that the condition for reproducing the event record data is established (step S110: No), the control section 100 ends the processing shown in FIG.

On the other hand, when determining that the condition for reproducing the event record data is satisfied (step S110: Yes), the reproduction control unit 124 starts reproducing the event record data to be reproduced (step S111). The event record data to be reproduced is the event record data saved by the process of FIG. 7 based on the event that triggered the start of the process of FIG. 8, that is, the event record data saved immediately before the reproduction condition was established. be.

Here, the reproduction control unit 124 may end the reproduction of the event record data after the first reproduction of the event record data is completed, or even after the first reproduction of the event record data is completed, the reproduction may be stopped. The reproduction of the event record data may be repeated (repeat reproduction) until the stop operation is received. By performing such processing, after an event such as an accident occurs, the video of the most recently recorded event is repeatedly reproduced. Therefore, when an accident or the like occurs, the user can repeatedly check the video of the event by simply stopping the vehicle and removing the recording/reproducing device 10 .

As described above, the reproduction control unit 124 may reproduce the event recording data after a predetermined period of time (for example, 5 seconds) has elapsed since it was determined that the conditions for reproducing the event recording data were established. A period P11 shown in FIG. 10 indicates a period from when the reproduction control unit 124 determines that the condition for reproducing the event record data is satisfied until reproduction of the event record data is started.

A period P11 is a period in which a predetermined period has elapsed since the device acceleration exceeded the attachment/detachment threshold value, and at time t6 after the period P1 has elapsed, the value of the device acceleration is stable at a low level. That is, at time t6, the user U removes the recording/reproducing device 10 and either holds it in his hand or leaves it at rest. That is, the period P11 is set to a period, such as 10 seconds, until the user U removes the recording/reproducing device 10 and can see the display section 141 . The recording/reproducing device 10 starts reproducing the event record data after a period P11 has elapsed since the removal of the recording/reproducing device 10 was detected. Therefore, the reproduction of the event record data is started after the user U completes the task of removing the recording/reproducing device 10 . With this setting, the recording/reproducing device 10 preferably displays the event recording data to the user.

Return to FIG. Next, the control section 100 determines whether or not to terminate the reproduction of the event record data (step S112). Specifically, for example, the control unit 100 starts the reproduction when the first reproduction of the event record data is completed, or when the operation control unit 125 that receives the user's operation receives the stop of the reproduction of the event record data. Decide to finish. If it is not determined that the reproduction has ended (step S112: No), the control section 100 continues reproducing the event record data. On the other hand, if it is determined that the reproduction is finished (step S112: Yes), the control section 100 performs processing for terminating the reproduction of the event record data (step S113), and terminates the processing shown in FIG.

As described above, the control unit 100 detects a change in the value of the device acceleration sensor 142, and when it detects that the recording/reproducing device 10 has been removed from the acceleration value, performs a series of processes for reproducing event record data. conduct.

Note that the series of processes shown in FIG. 8 are not limited to being performed during the period from the start to the end of a specific event. However, the series of processes may be limited to be executed under the following conditions, for example.

For example, confirmation of event record data based on events detected while a vehicle, which is a mobile object, is often performed while the vehicle is stopped after traveling. Therefore, the attachment/detachment threshold may be detected during a predetermined period (for example, 10 minutes) after the vehicle engine or power supply is turned off, in addition to the period during which the vehicle engine or power supply is in operation. Further, in many cases, the event record data relating to the occurrence of an event detected while the vehicle is parked is reproduced before the vehicle starts running. Therefore, the attachment/detachment threshold may be detected for a predetermined period of time, for example, from the time the door is unlocked or the passenger gets on the vehicle, regardless of whether the vehicle engine or power supply is in operation. Alternatively, the condition may be that the vehicle is not running or that the transmission of the vehicle is in neutral or parking.

As described above, the recording/reproducing apparatus 10 reproduces the event recording data after the condition for reproducing the event recording data is established after the occurrence of the event is detected. Therefore, the recording/reproducing apparatus 10 displays the event record data to the user without complicated operations after the occurrence of the event. That is, according to Embodiment 1, it is possible to provide a recording/reproducing apparatus or the like that reproduces stored data without complicated operations.

Note that the recording/reproducing apparatus 10 according to the first embodiment is not limited to the configuration described above. For example, recording device 160 may be a server or computer connected by wire or wirelessly. The recording device 160 may be a cloud computer connected via a network such as the Internet. The location information acquired by the location information acquiring unit 128 may be information that identifies the current location from location information of access points or the like by receiving Wi-Fi (registered trademark) radio waves instead of GPS signals.

Camera 150 may be a plurality of cameras instead of a single camera. The camera 150 may not be included in the recording/playback device. In that case, the camera 150 is connected to the recording/reproducing device 10 by wire or wirelessly, and supplies video data captured by the camera 150 to the recording/reproducing device 10 .

The control unit 100 may stop acquiring the photographed data when the conditions for reproducing the event record data are satisfied. Further, the control section 100 may acquire the shooting data again after stopping the reproduction of the event recording data.

If there is a plurality of unreproduced event record data, the reproduction control unit 124 may repeatedly reproduce only the most recent event record data, or may continuously reproduce a plurality of unreproduced event record data. . Further, in this case, whether to reproduce only the most recent event record data or to continuously reproduce a plurality of event record data may be determined based on the time when the event record data was recorded.

<Modification of Embodiment 1>
Next, a modification of Embodiment 1 will be described with reference to FIG. The modified example of the first embodiment differs from the first embodiment in the conditions for reproducing event record data. 11 is a graph of acceleration showing reproduction conditions according to the modification of the first embodiment. FIG.

In FIG. 11, from time t1 to time t2, the device acceleration changes from less than the attachment/detachment threshold value Gth1 to greater than the attachment/detachment threshold value Gth1, and the moving body acceleration hardly changes. In other words, the change in mobile acceleration is smaller than the change in device acceleration. In other words, the device acceleration has changed to be greater than the mobile body acceleration. From time t3 to time t4, the device acceleration further changes from being greater than the attachment/detachment threshold Gth1 to being less than the attachment/detachment threshold Gth1. In other words, the state in which the device acceleration is greater than the mobile body acceleration is changed to a state in which there is relatively no difference. The reproduction control unit 124 in the modified example of the first embodiment determines that the conditions for reproducing the event record data are established at time t4. By setting in this way, the recording/reproducing device 10 can reproduce the event record data after the removal work of the recording/reproducing device 10 is surely completed.

Note that the reproduction control unit 124 may reproduce the event recording data after a predetermined period of time (for example, two seconds) has elapsed since it was determined that the conditions for reproducing the event recording data have been satisfied. A period P21 shown in FIG. 11 indicates a period from when the reproduction control unit 124 determines that the condition for reproducing the event record data is satisfied until reproduction of the event record data is started. That is, in the case of the example shown in the drawing, the recording/reproducing device 10 starts reproducing the event record data at time t6. By setting in this way, the recording/reproducing device 10 reliably finishes the work of removing the recording/reproducing device 10, and preferably reproduces the event record data at the timing when the user is expected to be paying attention to the display unit 141. can start.

The programs described above can be stored and provided to computers using various types of non-transitory computer-readable media. Non-transitory computer-readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (eg, flexible discs, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical discs), CD-ROM (Read Only Memory) CD-R, CD - R/W, including semiconductor memory (eg Mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), Flash ROM, RAM (Random Access Memory)). The program may also be provided to the computer by various types of transitory computer readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. Transitory computer-readable media can deliver the program to the computer via wired channels, such as wires and optical fibers, or wireless channels.

Moreover, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the invention. For example, the above recording/reproducing apparatus has been described as an example of a drive recorder mounted on an automobile, but the recording/reproducing apparatus may be mounted on various types of vehicles such as motorcycles and bicycles. Moreover, the target on which the recording/reproducing device is mounted is not limited to a vehicle, and may be a moving object such as a railroad, a ship, or an aircraft. Also, the recording/reproducing device may be worn and used by a person, a walking robot, or the like.

10, 20 recording/reproducing apparatus 100, 200 control unit 110 bus line 120 photographed data acquisition unit 121 buffer memory 122 photographed data processing unit 123 recording control unit 124 reproduction control unit 125 operation control unit 126 display control unit 127 acceleration information acquisition unit 128 position Information acquisition unit 130 Event detection unit 140 Operation unit 141 Display unit 142 Device acceleration sensor 143 GPS reception unit 150 Camera 160 Recording device 170 Communication unit 900 Bracket 901 Adhesive unit 902 Holding unit 903 Ball joint 920 Case 921 Detachable units C11 and C21 Photographed data E11 Event record data WS Windshield

Claims (6)

A recording/reproducing device installed in a mobile body for recording and reproducing photographed data photographed by a camera,
a photographed data acquisition unit that acquires the photographed data;
an acceleration information acquisition unit that acquires device acceleration applied to the recording/reproducing device and mobile body acceleration applied to the mobile body;
an event detection unit that detects that an event has occurred with respect to the moving object;
a recording control unit configured to store, as event record data, the photographed data for a preset period from at least a part of the photographed data based on the detection of the event;
a reproduction control unit that starts reproducing the event record data after the event is detected and when it is detected that the device acceleration has changed to a state greater than the mobile body acceleration. playback device. The reproduction control unit detects that the device acceleration changes to a state greater than an attachment/detachment threshold for detecting removal of the recording/reproducing device from the moving body, and that the change in the moving body acceleration at that time is relatively small. 2. The recording/reproducing apparatus according to claim 1, wherein the reproduction of the event recording data is started when the event recording data is received. The reproduction control unit detects that the device acceleration changes to a state greater than an attachment/detachment threshold for detecting removal of the recording/reproducing device from the moving body, and that the change in the moving body acceleration at that time is relatively small. and if
2. The recording/reproducing apparatus according to claim 1, wherein the reproduction of the event record data is started when it is detected that the device acceleration further changes from a state larger than the attachment/detachment threshold to a value smaller than the attachment/detachment threshold. The event detection unit detects that the event has occurred with respect to the mobile body when either the device acceleration or the mobile body acceleration changes to a state larger than an event threshold for detecting the event with respect to the mobile body. 4. The recording/reproducing apparatus according to any one of claims 1 to 3, which detects that A recording/reproducing method in a recording/reproducing device installed in a mobile body for recording and reproducing photographed data photographed by a camera,
a photographed data acquisition step of acquiring the photographed data;
an event detection step of detecting that an event has occurred with respect to the moving object;
a recording control step of storing, as event record data, the photographed data for a preset period from at least a part of the photographed data based on the detection of the event;
After the event is detected and when it is detected that the device acceleration applied to the recording/reproducing device has changed to a state greater than the moving body acceleration applied to the moving body, the reproduction of the event record data is started. A recording/reproducing method comprising a reproduction control step. A program to be executed by a computer that operates a recording/reproducing device that is installed in a mobile body and that records and reproduces photographed data photographed by a camera,
a photographed data acquisition step of acquiring the photographed data;
an event detection step of detecting that an event has occurred with respect to the moving object;
a recording control step of storing, as event record data, the photographed data for a preset period from at least part of the photographed data based on the detection of the event;
After the event is detected and when it is detected that the device acceleration applied to the recording/reproducing device has changed to a state greater than the moving body acceleration applied to the moving body, the reproduction of the event record data is started. A program comprising a playback control step.

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