Vehicle recording control device and recording control method

Abstract

To appropriately record video.SOLUTION: A vehicle recording control device 20 includes: a video data acquisition unit 21 that acquires data about video photographed by an imaging unit that images the surroundings of a vehicle; a vehicle outside information acquisition unit 27 that acquires information indicating visibility of the outside of the vehicle from the vehicle; and a recording control unit 31 that associates the information indicating visibility with the video data acquired by the video data acquisition unit 21, and when a recording unit does not have a free space, overwrites video data imaged in a state in which the visibility of the outside of the vehicle from the vehicle is low.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a recording control device and a recording control method for a vehicle. [Background technology]

[0002] Drive recorders have become widespread, and in addition to recording video based on events such as accidents, they are also used to later review video of points of interest such as stopovers and passing points. For example, when traveling, people may review video of scenic routes or interesting buildings, or post them on SNS (Social Networking Service).

[0003] A technique has been disclosed for overwriting and recording video files and prohibiting overwriting of video files related to an event (see, for example, Patent Document 1). A technique has been disclosed for lowering the priority of overwriting video files that are likely to include the object causing the event (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-182573 A [Patent Document 2] JP 2020-113067 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, since the recording device that records the video captured by the drive recorder has a capacity limit, there is a possibility that video other than that recorded when an event occurs or during manual event recording may be overwritten and erased.

[0006] An object of the present invention is to provide a recording control device for a vehicle and a recording control method that are capable of appropriately recording video. [Means for solving the problem]

[0007] The vehicle recording control device of the present invention includes a video data acquisition unit that acquires video data captured by an imaging unit that captures the area around the vehicle, an outside-vehicle information acquisition unit that acquires information indicating the visibility outside the vehicle, and a recording control unit that matches the information indicating the visibility and, if there is no free space in the recording unit, overwrites the video data captured in a state where the visibility outside the vehicle was low.

[0008] The recording control method of the present invention is performed by a vehicle recording control device, which includes the steps of acquiring video data captured by an imaging unit that captures the area around the vehicle, acquiring information indicating the visibility outside the vehicle, and associating the information indicating the visibility with the video data acquired by the video data acquisition unit, and if there is no free space in the recording unit, overwriting the video data captured in a state where the visibility outside the vehicle was low. Effect of the Invention

[0009] According to the present invention, the overwrite priority can be changed without user operation. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a vehicle-mounted recording device having a recording control device according to the first embodiment. [Diagram 2] FIG. 2 is a flowchart showing the flow of recording processing in the recording control device according to the first embodiment. [Diagram 3] FIG. 3 is a flowchart showing the flow of recording processing in the recording control device according to the second embodiment. [Figure 4] FIG. 4 is a block diagram showing an example of the configuration of a vehicle-mounted recording device having a recording control device according to the third embodiment. [Diagram 5] FIG. 5 is a flowchart showing the flow of recording processing in the recording control device according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description will be given of an embodiment of a vehicle record control device and a record control method according to the present invention with reference to the accompanying drawings. It should be noted that the present invention is not limited to the following embodiment.

[0012] [First embodiment] 1 is a block diagram showing an example of the configuration of a vehicle recording device 10 having a vehicle recording control device (hereinafter referred to as a "recording control device") 20 according to a first embodiment. The vehicle recording device 10 records video data with a higher overwrite priority, the lower the visibility outside the vehicle is.

[0013] The vehicle recording device 10 is a so-called drive recorder, and may be a device that is installed in the vehicle or a portable device that can be used in the vehicle. The vehicle recording device 10 has a camera (photographing unit) 11, a recording unit 12, an operation unit 13, an acceleration sensor 14, a communication unit 15, a GNSS (Global Navigation Satellite System) receiving unit 16, and a recording control device 20.

[0014] The camera 11 is a camera that captures the surroundings of the vehicle. The camera 11 may be a camera that can capture the entire 360° sky, or may be a group of multiple cameras that capture each direction. The camera 11 is disposed, for example, at the front of the vehicle interior. The camera 11 captures images all the time from when the engine starts to when it stops, that is, while the vehicle is operating. In this embodiment, the camera 11 captures images all the time while the accessory power of the vehicle is ON. The camera 11 outputs the captured image data to the image data acquisition unit 21 of the recording control device 20. The image data is, for example, a video consisting of images of 30 frames per second.

[0015] The recording unit 12 is used for temporary storage of data in the vehicle recording device 10. The recording unit 12 is, for example, a recording unit such as a semiconductor memory element such as a random access memory (RAM) or a flash memory, or a memory card. Alternatively, the recording unit 12 may be an external storage device wirelessly connected via the communication unit 15. The recording unit 12 records various data such as event recording data that is recorded when an event is detected, based on a control signal output from the recording control unit 31 of the recording control device 20. The recording unit 12 stores the event recording data as, for example, video data that cannot be overwritten.

[0016] The operation unit 13 can accept various operations for the vehicular recording device 10. For example, the operation unit 13 can accept an operation to manually save the captured video data in the recording unit 12. For example, the operation unit 13 can accept an operation to play back the loop recording data recorded in the recording unit 12. For example, the operation unit 13 can accept an operation to erase the recording data recorded in the recording unit 12. For example, the operation unit 13 can accept an operation to end the loop recording. The operation unit 13 outputs operation information to the operation control unit 25 of the recording control device 20.

[0017] The acceleration sensor 14 is a sensor that detects acceleration applied to the vehicle. The acceleration sensor 14 outputs the detection result to the event detection unit 26 of the recording control device 20. The acceleration sensor 14 is a sensor that detects acceleration in, for example, three axial directions. The three axial directions are the front-rear direction, the left-right direction, and the up-down direction of the vehicle. An impact to the vehicle can be detected by the acceleration in the three axial directions.

[0018] The communication unit 15 is a communication unit. The communication unit 15 enables data transmission and reception with an external server device of the vehicle. The communication unit 15 communicates wirelessly or wired. The communication unit 15 may use, for example, a mobile phone line including a 5G line. The communication unit 15 may use, for example, a wireless communication standard including Wi-Fi (registered trademark) and Bluetooth (registered trademark). The communication unit 15 may use a wired communication standard. The communication unit 15 is controlled to transmit and receive data by the outside-vehicle information acquisition unit 27 of the recording control device 20. More specifically, the communication unit 15 transmits location information of the current location of the vehicle to the external server device. The communication unit 15 receives the outside-vehicle information from the external server device. Alternatively, the communication unit 15 may receive the outside-vehicle information from a navigation system of the vehicle.

[0019] In this embodiment, the outside-vehicle information is sunshine duration information indicating the sunshine duration corresponding to the position information of the current position of the vehicle. The sunshine duration information is information that makes it possible to determine whether the driver's visibility due to sunlight is good or bad at the current position of the vehicle. The sunshine duration information may be information indicating the sunrise time and sunset time at the current position. The sunshine duration information may be information indicating the sunrise time and sunset time taking into account the elevation difference between the current position and the surrounding area. The sunrise time may include a predetermined time before sunrise, and the sunset time may include a predetermined time after sunset.

[0020] The GNSS receiving unit 16 is composed of a GNSS receiver that receives GNSS signals from GNSS satellites, etc. The GNSS receiving unit 16 outputs the received GNSS signals to a position information acquiring unit 28 of the recording control device 20.

[0021] The recording control device 20 is an arithmetic processing device (control device) constituted by, for example, a CPU (Central Processing Unit). The recording control device 20 loads a stored program into memory and executes instructions contained in the program. The recording control device 20 is a computer that runs the program according to the present invention. The recording control device 20 includes an internal memory (not shown) that is used for temporary storage of data such as the program in the recording control device 20. The recording control device 20 includes a video data acquisition unit 21, a buffer memory 22, a video data processing unit 23, an operation control unit 25, an event detection unit 26, an outside-vehicle information acquisition unit 27, a position information acquisition unit 28, and a recording control unit 31, which are connected to a bus 20X.

[0022] The video data acquisition unit 21 acquires video data captured around the vehicle. More specifically, the video data acquisition unit 21 acquires the video data output by the camera 11.

[0023] The buffer memory 22 is one of the internal memories included in the recording control device 20, and is a memory for temporarily recording a certain period of video data acquired by the video data acquisition unit 21 while updating it.

[0024] The video data processing unit 23 converts the video data temporarily stored in the buffer memory 22 into an arbitrary file format, such as MP4 format, encoded with an arbitrary codec, such as H.264 or MPEG-4 (Moving Picture Experts Group). The video data processing unit 23 generates video data as files for a certain period of time from the video data temporarily stored in the buffer memory 22. As a specific example, the video data processing unit 23 generates 60 seconds of video data as one file in the order of recording from the video data temporarily stored in the buffer memory 22. The video data processing unit 23 outputs the generated video data to the recording control unit 31. The period of the video data generated as a file is set to 60 seconds as an example, but is not limited to this. The video data referred to here may be data including audio in addition to the video captured by the camera 11.

[0025] The operation control unit 25 acquires operation information of an operation accepted by the operation unit 13. For example, the operation control unit 25 acquires save operation information indicating a manual save operation of video data, selection operation information indicating a selection operation of video data, playback operation information indicating a playback operation of video data, or deletion operation information indicating a deletion operation of video data, and outputs a control signal. For example, the operation control unit 25 acquires end operation information indicating an operation to end loop recording, and outputs a control signal.

[0026] The event detection unit 26 detects an event for the vehicle. The method by which the event detection unit 26 detects an event for the vehicle is arbitrary, but as one example, the event detection unit 26 detects an event based on the detection result of the acceleration sensor 14. In this case, the event detection unit 26 detects an event when an acceleration equal to or greater than a threshold value in the acceleration detected by the acceleration sensor 14 is detected. The acceleration detected as an event by the event detection unit 26 is set to a threshold value that detects an impact on the vehicle.

[0027] The outside-vehicle information acquisition unit 27 acquires information indicating the visibility of the outside of the vehicle. The outside-vehicle information acquisition unit 27 has a function as a so-called communication control unit. The outside-vehicle information acquisition unit 27 controls the communication unit 15 to acquire information from outside the vehicle.

[0028] In this embodiment, the vehicle outside information acquisition unit 27 acquires sunshine hour information as information indicating the visibility outside the vehicle. More specifically, the vehicle outside information acquisition unit 27 transmits position information of the current position of the vehicle to an external server device via the communication unit 15. The vehicle outside information acquisition unit 27 receives sunshine hour information indicating the sunshine hour corresponding to the position information of the current position of the vehicle from the external server device via the communication unit 15. Alternatively, the vehicle outside information acquisition unit 27 transmits sunshine hour information indicating the sunshine hour corresponding to the position information of the current position of the vehicle to the navigation system via the communication unit 15. may be received from

[0029] The position information acquisition unit 28 calculates position information of the current position of the vehicle by a known method based on the radio waves received by the GNSS receiving unit 16. The position information calculated by the position information acquisition unit 28 is stored together with the recorded data.

[0030] The recording control unit 31 controls the recording unit 12 to record the video data filed by the video data processing unit 23. During a period in which the loop recording process is being executed, such as when the vehicle accessory power source is ON, the recording control unit 31 records the video data filed by the video data processing unit 23 as overwritable video data in the recording unit 12. More specifically, during a period in which the loop recording process is being executed, the recording control unit 31 continues to record the video data generated by the video data processing unit 23 in the recording unit 12, and when the capacity of the recording unit 12 becomes full, it overwrites the oldest video data with new video data.

[0031] The recording control unit 31 stores the captured data when an event is detected by the event detection unit 26 in the recording unit 12 as overwrite-prohibited video data. More specifically, the recording control unit 31 stores the captured data including the time of event detection and a predetermined period before and after the time of event detection in the recording unit 12 as overwrite-prohibited event recording data. In other words, the recording control unit 31 records the captured data when an event is not detected by the event detection unit 26 in the recording unit 12 as overwritable video data. When it becomes necessary to overwrite video data in the recording unit 12, the recording control unit 31 overwrites the video data with a higher overwrite priority. When it becomes necessary to overwrite video data in the recording unit 12, the recording control unit 31 may further overwrite the video data in order of oldest to newest recording date and time.

[0032] The recording control unit 31 associates the information acquired by the vehicle outside information acquisition unit 27 with the video data acquired by the video data acquisition unit 21, and records the video data in the recording unit 12 with a higher priority for overwriting, the lower the visibility outside the vehicle of the video data captured. The recording control unit 31 records the video data in the recording unit 12 with a higher priority for overwriting, the lower the visibility outside the vehicle of the video data captured. Video data captured in a state where the visibility outside the vehicle of the vehicle is low is likely to not clearly capture the scenery, etc., and is unlikely to be viewed again later, so it is made easy to overwrite. Video data captured in a state where the visibility outside the vehicle of the vehicle is high is likely to clearly capture the scenery, etc., and is likely to be viewed again later, so it is made difficult to overwrite.

[0033] In this embodiment, the recording control unit 31 sets the priority of overwriting based on the sunshine hour information. More specifically, in this embodiment, the recording control unit 31 records the video data shot during non-sunshine hours in the recording unit 12 with a higher priority of overwriting than that of video data shot during sunshine hours. Video data shot during non-sunshine hours is more likely to be overwritten because it is highly likely that the scenery, etc. is not clearly captured and it is less likely that the data will be viewed later. Video data shot during sunshine hours is less likely to be overwritten because it is highly likely that the scenery, etc. is clearly captured and it is more likely that the data will be viewed later.

[0034] The overwrite priority is added as attribute information of the video data.

[0035] Next, the flow of the recording process in the recording control device 20 will be described with reference to Fig. 2. Fig. 2 is a flowchart showing the flow of the recording process in the recording control device 20 according to the first embodiment. The process shown in Fig. 2 is executed during the period when the loop recording process is executed, such as when the accessory power of the vehicle is ON.

[0036] First, the recording control device 20 generates a file (step S01). More specifically, the recording control device 20 uses the video data processing unit 23 to generate files of video data for a certain period of time from the video data temporarily stored in the buffer memory 22. The recording control device 20 uses the video data processing unit 23 to generate one file of 60 seconds of video data in recording order from the video data temporarily stored in the buffer memory 22. The recording control device 20 proceeds to step S02.

[0037] The recording control device 20 assigns priorities based on the sunshine information (step S02). More specifically, the recording control unit 31 of the recording control device 20 sets a higher overwriting priority for video data captured in a state where visibility outside the vehicle is low. In this embodiment, the recording control device 20 sets a higher overwriting priority for video data captured in non-sunshine hours than for video data captured in sunshine hours. The recording control device 20 proceeds to step S03.

[0038] The recording control device 20 determines whether there is free space (step S03). More specifically, the recording control device 20 determines whether there is free space by checking whether the free space of the recording unit 12 is equal to or larger than the capacity of the generated video data using the recording control unit 31. If the recording control unit 31 determines that the recording unit 12 has sufficient free space (Yes in step S03), in other words, if there is free space, the recording control device 20 proceeds to step S04. If the recording control unit 31 determines that the recording unit 12 does not have enough free space (No in step S03), in other words, if there is no free space, the recording control device 20 proceeds to step S05.

[0039] If it is determined that the free space in the recording unit 12 is sufficient (Yes in step S03), the recording control device 20 records the video data in the free space as an overwritable file (step S04). More specifically, the recording control device 20 records the video data in the free space in the recording unit 12 as an overwritable file via the recording control unit 31. The recording control device 20 proceeds to step S06.

[0040] If it is determined that the free space of the recording unit 12 is insufficient (No in step S03), the recording control device 20 records the video file as an overwritable file in the video data with the highest overwriting priority (step S05). More specifically, the recording control device 20 causes the recording control unit 31 to record the video file as an overwritable file in the video data with the highest overwriting priority from among the video data recorded in the recording unit 12. If there is a plurality of video data with high overwriting priority, the video file is recorded as an overwritable file in the oldest video data. If there is no video data with high overwriting priority, the video file is recorded as an overwritable file in the oldest video data from among the video data recorded in the recording unit 12. The recording control device 20 proceeds to step S06.

[0041] The recording control device 20 determines whether or not an event has been detected (step S06). More specifically, if the acceleration detected by the event detection unit 26 is equal to or greater than a threshold, the recording control device 20 determines that an event has been detected (Yes in step S06) and proceeds to step S07. If the event detection unit 26 determines that the acceleration detected is not equal to or greater than the threshold, the recording control device 20 determines that an event has not been detected (No in step S06) and proceeds to step S08.

[0042] If it is determined that an event has been detected (Yes in step S06), the recording control device 20 causes the recording control unit 31 to store the captured video data as event recording data in the recording unit 12 as a write-protected file (step S07), and proceeds to step S08.

[0043] The recording control device 20 determines whether or not to end the loop recording (step S08). More specifically, if an operation to stop recording of video data is performed, or if a control signal to stop recording is received from the recording control unit 31 (Yes in step S08), the recording control device 20 ends the loop recording and ends the process. If an operation to stop recording of video data is not performed, and if a control signal to stop recording is not received from the recording control unit 31 (No in step S08), the recording control device 20 returns to step S01 and executes the process again.

[0044] In this way, the video data shot in a state where the visibility outside the vehicle is low is set to a higher priority for overwriting and recorded in the recording unit 12. As a result, when the free space in the recording unit 12 runs out during loop recording, video data shot in a state where the visibility outside the vehicle is low for a vehicle with a high priority for overwriting is overwritten first. Video data shot in a state where the visibility outside the vehicle is high for a vehicle with a low priority for overwriting is less likely to be overwritten. In addition, event record data shot when an event is detected is stored in the recording unit 12 as a file that cannot be overwritten.

[0045] In this embodiment, video data shot during non-sunshine hours is set to have a higher overwrite priority than video data shot during sunlight hours and is recorded in the recording unit 12. As a result, when the recording unit 12 runs out of free space during loop recording, video data shot during non-sunshine hours, which has a higher overwrite priority, is overwritten first. Video data shot during sunlight hours, which has a lower overwrite priority, is less likely to be overwritten.

[0046] As described above, in this embodiment, the higher the overwrite priority is set for video data captured in a state where visibility outside the vehicle of the vehicle is low, and the data can be recorded in the recording unit 12. As a result, in this embodiment, when the free space of the recording unit 12 runs out during loop recording, the video data captured in a state where visibility outside the vehicle of a vehicle with a high overwrite priority can be overwritten. In this embodiment, video data captured in a state where visibility outside the vehicle of a vehicle with a low overwrite priority is high can be made less likely to be overwritten.

[0047] In this embodiment, video data shot during non-sunshine hours can be set to have a higher overwrite priority than video data shot during sunlight hours and recorded in the recording unit 12. As a result, in this embodiment, when the recording unit 12 runs out of free space during loop recording, video data shot during non-sunshine hours, which has a higher overwrite priority, can be overwritten first. This embodiment makes it possible to make video data shot during sunlight hours, which has a lower overwrite priority, less likely to be overwritten.

[0048] In this embodiment, the overwriting priority can be changed without user operation, and the overwriting priority can be set easily and reliably.

[0049] [Second embodiment] The vehicle recording device 10 according to this embodiment will be described with reference to Fig. 3. Fig. 3 is a flowchart showing the flow of recording processing in the recording control device 20 according to the second embodiment. The basic configuration of the vehicle recording device 10 is similar to that of the vehicle recording device 10 of the first embodiment. In the following description, components similar to those of the vehicle recording device 10 are given the same or corresponding reference numerals, and detailed description thereof will be omitted.

[0050] The outside-vehicle information is weather information corresponding to the position information of the current position of the vehicle. The weather information is information that can determine the quality of the driver's visibility due to the weather at the current position of the vehicle. The weather information may be, for example, information indicating bad weather such as rain, cloudy, snow, fog, etc. The weather information may be, for example, information indicating good weather such as sunny weather.

[0051] The outside-vehicle information acquisition unit 27 transmits the position information of the current position of the vehicle to the external server device via the communication unit 15. The outside-vehicle information acquisition unit 27 receives, via the communication unit 15, weather information corresponding to the position information of the current position of the vehicle from the external server device.

[0052] The recording control unit 31 sets the priority of overwriting based on the weather information. More specifically, in this embodiment, the recording control unit 31 sets the priority of overwriting higher for video data taken in bad weather than for video data taken in good weather, and records the video data taken in bad weather in the recording unit 12. Video data shot in good weather is likely to have a clear view of the scenery, etc., and is therefore unlikely to be viewed again later, so it is made easier to overwrite. Video data shot in good weather is likely to have a clear view of the scenery, etc., and is therefore likely to be viewed again later, so it is made less likely to be overwritten.

[0053] Next, the flow of recording processing in the recording control device 20 will be described with reference to Fig. 3. The processing in steps S11, and steps S13 to S18 is similar to that in steps S01, and steps S03 to S08 in the flowchart shown in Fig. 2.

[0054] The recording control device 20 assigns priorities based on the weather information (step S12). More specifically, the recording control device 20 assigns a higher overwrite priority to video data captured in bad weather than to video data captured in good weather, via the recording control unit 31. The recording control device 20 proceeds to step S13.

[0055] In this embodiment, video data shot in bad weather is set to have a higher overwrite priority than video data shot in good weather and is recorded in the recording unit 12. As a result, when the recording unit 12 runs out of free space during loop recording, video data shot in bad weather, which has a higher overwrite priority, is overwritten first. Video data shot in good weather, which has a lower overwrite priority, is less likely to be overwritten.

[0056] As described above, in this embodiment, video data shot in bad weather can be set to have a higher overwrite priority than video data shot in good weather and recorded in the recording unit 12. As a result, in this embodiment, when the free space in the recording unit 12 runs out during loop recording, video data shot in bad weather, which has a higher overwrite priority, can be overwritten. In this embodiment, video data shot in good weather, which has a lower overwrite priority, can be made less likely to be overwritten.

[0057] [Third embodiment] The vehicular recording device 10 according to this embodiment will be described with reference to Figs. 4 and 5. Fig. 4 is a block diagram showing an example of the configuration of a vehicular recording device having a recording control device 20 according to a third embodiment. Fig. 5 shows the flow of recording processing in the recording control device 20 according to the third embodiment. 13 is a flowchart showing the configuration of the vehicle recording device 10A according to the first embodiment. The vehicle recording device 10A differs from the first embodiment in that it has an illuminance sensor 17A and in the processes performed by an outside-vehicle information acquisition unit 27A and a recording control unit 31A.

[0058] The vehicle exterior information is illuminance information at the current position of the vehicle. The illuminance information is information that enables a determination of the quality of the driver's visibility based on the illuminance.

[0059] The illuminance sensor 17A is an illuminance sensor that detects the illuminance around the vehicle and outputs the detected illuminance information to the outside-of-vehicle information acquisition unit 27A.

[0060] The outside-vehicle information acquisition unit 27A acquires illuminance information from the detection result of the illuminance sensor 17A.

[0061] The recording control unit 31A sets the priority of overwriting based on the illuminance information. More specifically, in this embodiment, the recording control unit 31A records video data shot when the illuminance is low in a higher priority of overwriting than video data shot when the illuminance is high in the recording unit 12. Video data shot when the illuminance is low is likely to have scenes not clearly captured and is unlikely to be viewed later, so it is made easy to overwrite. Video data shot when the illuminance is high is likely to have scenes clearly captured and is likely to be viewed later, so it is made difficult to overwrite.

[0062] For example, high illuminance refers to illuminance outside the vehicle of 1000 lux or more. Low illuminance refers to illuminance outside the vehicle of 999 lux or less. Furthermore, low illuminance may be divided into 99 lux or less and 100 lux to 999 lux. When the illuminance is 99 lux or less, a higher priority for overwriting may be set than when the illuminance is 100 lux to 999 lux.

[0063] Next, the flow of recording processing in the recording control device 20A will be described with reference to Fig. 5. The processing in steps S21, and steps S23 to S28 is similar to that in steps S01, and steps S03 to S08 in the flowchart shown in Fig. 2.

[0064] The recording control device 20A assigns priorities based on the illuminance information (step S22). More specifically, the recording control device 20A sets, via the recording control unit 31A, a higher overwrite priority for video data captured when the illuminance was low than for video data captured when the illuminance was high. The recording control device 20A proceeds to step S23.

[0065] In this manner, in this embodiment, video data shot when the illuminance was low is set to have a higher overwrite priority than video data shot when the illuminance was high, and is recorded in the recording unit 12. As a result, when the recording unit 12 runs out of free space during loop recording, video data shot when the illuminance was low, which has a higher overwrite priority, is overwritten. Video data shot when the illuminance was high, which has a lower overwrite priority, is less likely to be overwritten.

[0066] As described above, in this embodiment, video data shot when the illuminance is low can be set to have a higher overwrite priority than video data shot when the illuminance is high, and recorded in the recording unit 12. As a result, in this embodiment, when the recording unit 12 runs out of free space during loop recording, the video data shot when the illuminance is low, which has a higher overwrite priority, can be overwritten. In this embodiment, video data shot when the illuminance is high, which has a lower overwrite priority, can be made less likely to be overwritten.

[0067] The vehicle-mounted recording device 10 according to the present invention may be embodied in various different forms other than the above-described embodiment.

[0068] Each component of the illustrated vehicular recording device 10 is a functional concept, and does not necessarily have to be physically configured as illustrated. In other words, the specific form of each device is not limited to that shown in the figure, and all or part of the devices may be functionally or physically distributed or integrated in any unit depending on the processing load and usage status of each device.

[0069] The configuration of the vehicle recording device 10 is realized, for example, as software by a program loaded into a memory. In the above embodiment, the functional blocks are described as being realized by the cooperation of these hardware and software. In other words, these functional blocks can be realized in various forms by only hardware, only software, or a combination of both.

[0070] The above-mentioned components include those that a person skilled in the art can easily imagine and those that are substantially the same. Furthermore, the above-mentioned configurations can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the configurations are possible without departing from the scope of the present invention. [Explanation of symbols]

[0071] 10 Vehicle Recording Device 11 Camera 12 Recording section 13 Control section 14 Acceleration Sensor 15 Communications Department 16 GNSS receiver 20 Recording control device 20X Bus 21 Video data acquisition unit 22 Buffer Memory 23 Video data processing section 25 Operation control section 26 Event detection section 27 Vehicle external information acquisition unit 28 Location information acquisition section 31 Recording control section

Claims

1. a video data acquisition unit that acquires video data captured by an imaging unit that captures an image of the surroundings of the vehicle; An outside-vehicle information acquisition unit that acquires information indicating visibility outside the vehicle of the vehicle; a recording control unit that associates information indicating the visibility with the video data acquired by the video data acquisition unit, and overwrites the video data with video data captured in a state where the visibility outside the vehicle is low when there is no free space in a recording unit; A recording control device for a vehicle.

2. a position information acquisition unit that acquires position information of a current position of the vehicle; The vehicle outside information acquisition unit acquires information indicating visibility outside the vehicle based on the position information acquired by the position information acquisition unit, the recording control unit records the video data in the recording unit while setting an overwrite priority in accordance with the information indicating the visibility corresponding to the position information, to the video data. The recording control device for a vehicle according to claim 1.

3. The recording control unit sets a higher priority for overwriting video data captured in a state where visibility outside the vehicle of the vehicle is low.

3. The recording control device for a vehicle according to claim 1 or 2.

4. acquiring video data captured by an imaging unit that captures an image of the surroundings of the vehicle; obtaining information indicative of visibility outside the vehicle; a recording step of associating information indicating the visibility with the video data acquired by the video data acquisition unit, and overwriting the video data captured in a state where the visibility outside the vehicle of the vehicle is low when there is no free space in a recording unit; The recording control method is executed by a vehicle recording control device.

5. acquiring video data captured by an imaging unit that captures an image of the surroundings of the vehicle; obtaining information indicative of visibility outside the vehicle; a recording step of associating information indicating the visibility with the video data acquired by the video data acquisition unit, and overwriting the video data captured in a state where the visibility outside the vehicle of the vehicle is low when there is no free space in a recording unit; The recording control method executed by the vehicle recording control device is executed by a computer. program.

Images