JP2021051450A - Data record transmission device, data record transmission method, and data record transmission program - Google Patents

Abstract

To provide a data recording transmission device capable of improving the immediacy of transferring a moving image file over a network.SOLUTION: A recording medium 33 has a ring buffer area for cyclically recording moving image data, and an event recording area for copying the moving image data recorded in the ring buffer area and transmitting the moving image data to the outside. Upon detecting the occurrence of an event, a control unit 34 sets a first time, which is a first period before the time of the occurrence of the event, and a second time, which is a second time period before the time of the occurrence of the event. The control unit 34 applies controls to ensure that moving image data recorded in the ring buffer area or newly recorded from the first time to the second time is copied as a moving image to be transferred to an event recording area, and that the moving image data is sent to the outside by a network interface 36.SELECTED DRAWING: Figure 1

Description

The present invention relates to a data recording transmission device, a data recording transmission method, and a data recording transmission program.

In recent years, drive recorders that photograph the surroundings of own vehicles have become widespread. As described in Patent Document 1, the drive recorder writes moving image data obtained by photographing the periphery of the own vehicle into a memory in a ring buffer format. When an event such as a collision accident occurs, the drive recorder creates a moving image file for storage based on the moving image data at a predetermined time before and after the event occurrence time.

The drive recorder may transmit (network transfer) a moving image file to an outside such as an insurance company via a network by using a file transfer technique as described in Patent Document 2.

Japanese Unexamined Patent Publication No. 2019-28763 JP-A-2018-6957

A conventional drive recorder creates a moving image file for transfer and then transfers the moving image file to a network. Therefore, it takes a predetermined time to complete the network transfer of the moving image file. If the drive recorder is damaged due to a fire caused by an accident, the moving image file cannot be transferred to the network. Therefore, it is required to transfer the moving image file to the network as soon as possible.

An object of the present invention is to provide a data recording transmission device, a data recording transmission method, and a data recording transmission program capable of improving the immediacy of transferring a moving image file over a network.

According to the first aspect of the present invention, a recording medium interface for recording moving image data on a recording medium, a network interface for transmitting moving image data recorded on the recording medium to the outside via a network, and a network interface. A data recording transmission device including a control unit that controls recording of moving image data on the recording medium and transmission of moving image data recorded on the recording medium to the outside via a network is provided.
In the above data recording / transmitting device, the recording medium has a ring buffer area for cyclically recording moving image data and an event for copying the moving image data recorded in the ring buffer area and transmitting the moving image data to the outside. The control unit has a recording area, and in response to the detection of the occurrence of a predetermined event, the control unit has a first time that is one period before the event occurrence time and a second period from the event occurrence time. Only after the second time is set, the moving image data recorded in the ring buffer area or newly recorded from the first time to the second time is set as the moving image to be transferred. When the data is copied to the event recording area and transmitted to the outside by the network interface, the video image whose recording medium interface is in the event recording area at a predetermined time or a predetermined size of the transfer target moving images. After recording the data as unit data, the management information of the transfer file including the unit data is recorded on the management table recorded in the event recording area, and the transfer file is transmitted via the network by the network interface. After the transfer file is transmitted, the management information of the transfer file on the management table is deleted, and the management information of the recording file including the unit data is recorded on the management table. Then, the recording medium interface records new unit data in the event recording area, records the management information of the transfer file on the management table, and after the transmission of the transfer file, the management information of the transfer file is stored. Each time the data is deleted, the management information of the recording file is updated to the management information in which the new unit data is combined with the unit data included in advance.

According to the second aspect of the present invention, circular recording of moving image data in a ring buffer area in a recording medium, copying of moving image data recorded in the ring buffer area to an event recording area in the recording medium, In response to the detection of the occurrence of a predetermined event, the control unit that controls the transmission of the moving image data copied to the event recording area to the outside via the network is one period before the event occurrence time. From the first time recorded in the ring buffer area or newly recorded by setting the first time of the above and the second time only a second period after the event occurrence time. The moving image data up to the second time is used as the moving image to be transferred, and the moving image data in which the recording medium interface is in the event recording area at a predetermined time or a predetermined size of the moving image to be transferred is used as unit data. After recording, the management information of the transfer file including the unit data is recorded on the management table recorded in the event recording area, and the transfer file is transmitted to the outside via the network by the network interface. After transmitting the transfer file, the management information of the transfer file on the management table is deleted, the management information of the recording file including the unit data is recorded on the management table, and the recording medium interface. Records new unit data in the event recording area, records the management information of the transfer file on the management table, and deletes the management information of the transfer file after the transfer file is transmitted. A data recording transmission method for updating the management information of a recording file to management information in which the new unit data is combined with the unit data included in advance is provided.

According to the third aspect of the present invention, a ring buffer area for cyclically recording moving image data and an event recording area for copying the moving image data recorded in the ring buffer area and transmitting the moving image data to the outside. When the occurrence of a predetermined event is detected in the computer mounted on the drive recorder including the recording medium having the above, the first time corresponding to the first period before the event occurrence time and the first time from the event occurrence time are the first. The step of setting the second time after only two periods, and the moving image data from the first time to the second time recorded in the ring buffer area or newly recorded. As the transfer target moving image, when the recording medium interface records the moving image data having a predetermined time or a predetermined size in the transfer target moving image as unit data, it is recorded in the event recording area. A step of recording the management information of the transfer file including the unit data on the management table, a step of transmitting the transfer file to the outside via the network by the network interface, and a transmission of the transfer file. Later, the step of erasing the management information of the transfer file on the management table and recording the management information of the recording file including the unit data on the management table, and the recording medium interface are the event recording area. New unit data is recorded in the data, the management information of the transfer file is recorded on the management table, and the management information of the transfer file is managed every time the management information of the transfer file is deleted after the transfer file is transmitted. A data recording transmission program for executing a step of updating information to management information in which the new unit data is combined with the unit data included in advance is provided.

According to the data recording transmission device, the data recording transmission method, and the data recording transmission program of the present invention, it is possible to improve the immediacy of transferring a moving image file to a network.

It is a block diagram which shows one configuration example of the drive recorder which mounts the data recording transmission apparatus of one Embodiment. It is a figure which shows an example of the logical structure of a recording medium. It is a figure which conceptually shows the user data area of the ring buffer area and the event recording area of a recording medium. It is a figure which shows the cluster which is copied from the ring buffer area to the user data area of an event recording area when an event occurs. It is a figure which shows the state which the header for the master recording clip and the header for the FTP transfer recording clip are recorded in the user data area immediately after opening a file. Following FIG. 5, it is a diagram showing a state in which the multiplexing data recording unit RU1 is recorded in the user data area. Following FIG. 6, the footer for the FTP transfer recording clip including the recording unit RU1 is recorded in the user data area, and the management information of the FTP transfer recording clip including the recording unit RU1 is recorded on the file allocation table. It is a figure which shows the recorded state. FIG. 7 is a diagram showing a state immediately after the transfer of the FTP transfer recording clip including the recording unit RU1 is started and the recording of the multiplexed data recording unit RU2 is started, following FIG. 7. Following FIG. 8, it is a diagram showing a state in which the transfer of the FTP transfer recording clip including the recording unit RU1 is completed, and the management information of the master recording clip is recorded on the file allocation table. Following FIG. 9, it is a diagram showing a state in which the recording of the recording unit RU2 is completed and the header for the FTP transfer recording clip including the recording unit RU2 is recorded in the user data area. Following FIG. 10, the footer for the FTP transfer recording clip including the recording unit RU2 is recorded in the user data area, and the management information of the FTP transfer recording clip including the recording unit RU2 is recorded on the file allocation table. It is a figure which shows the recorded state. FIG. 11 is a diagram showing a state immediately after the transfer of the FTP transfer recording clip including the recording unit RU2 is started and the recording of the multiplexed data recording unit RU3 is started, following FIG. 11. Following FIG. 12, the transfer of the FTP transfer recording clip including the recording unit RU2 is completed, and the management information of the master recording clip in which the recording unit RU2 is combined with the recording unit RU1 is recorded on the file allocation table. It is a figure which shows the state. Following FIG. 13, it is a diagram showing a state in which the recording of the recording unit RU3 is completed and the header for the FTP transfer recording clip including the recording unit RU3 is recorded in the user data area. Following FIG. 14, the footer for the FTP transfer recording clip including the recording unit RU3 is recorded in the user data area, and the management information of the FTP transfer recording clip including the recording unit RU3 is recorded on the file allocation table. It is a figure which shows the recorded state. The copy of the last cluster was completed, the footer for the master recording clip was recorded in the user data area, and the management information of the master recording clip including the recording units RU1 to RU3 was recorded on the file allocation table. It is a figure which shows the state. It is a flowchart which shows the whole process until the drive recorder detects the occurrence of an event and transfers by FTP. The specific process of step S3 shown in FIG. 17, wherein the operation of the data record transmission device of one embodiment, the process executed by the data record transmission method of one embodiment, and the data record transmission program of one embodiment are control units. It is a flowchart which shows the process to execute.

Hereinafter, the data record transmission device, the data record transmission method, and the data record transmission program of one embodiment will be described with reference to the accompanying drawings. FIG. 1 shows a configuration example of a drive recorder equipped with a data recording / transmitting device of one embodiment and executing a data recording / transmitting method of one embodiment. The control unit 34 (central processing unit of the computer) included in the drive recorder shown in FIG. 1 executes the data recording / transmitting program of one embodiment.

In FIG. 1, the imaging unit 10 photographs the periphery of the own vehicle (front, rear, or omnidirectional), and supplies a video signal that captures the periphery of the own vehicle to the image coding unit 11. The image pickup unit 10 includes a plurality of lenses and an image pickup device that is a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide-Semiconductor). When the imaging unit 10 outputs the video signal of the digital signal, the video signal of the digital signal is supplied to the video coding unit 11 as it is. When the imaging unit 10 outputs a video signal of an analog signal, it may be converted into a digital signal by an A / D converter (not shown) and supplied to the video coding unit 11.

The video coding unit 11 compresses and encodes the video signal in a predetermined format, and the video data buffer 12 temporarily stores the encoded video data.

The voice acquisition unit 20 has a microphone, acquires voice inside or around the own vehicle, and supplies a voice signal to the voice coding unit 21. The voice signal is converted into a digital signal by an A / D converter (not shown) and supplied to the voice coding unit 21. The voice coding unit 21 compresses and encodes the voice signal in a predetermined format, and the voice data buffer 22 temporarily stores the coded voice data.

The multiplexing unit 30 multiplexes the video data output from the video data buffer 12 and the audio data output from the audio data buffer 22 to generate multiplexed data. The multiplexed data may be in any format. The multiplexed data buffer 31 temporarily stores the multiplexed data.

The control unit 34 executes a data recording transmission program stored in the storage unit 35 to record and reproduce the multiplexed data on the recording medium 33, and to the outside of the insurance company or the like via the network of the multiplexed data. Control network forwarding.

The recording medium interface (recording medium I / F) 32 records the multiplexed data on the recording medium 33 and reads out the multiplexed data recorded on the recording medium 33 based on the control by the control unit 34. The network interface (network I / F) 36 transfers the multiplexed data to the network based on the control by the control unit 34. The network I / F36 transmits the multiplexed data via a wired LAN or a wireless LAN. The network I / F36 transmits multiplexed data based on the Wi-Fi standard as an example.

An operation unit 37 is connected to the control unit 34. The user of the drive recorder can set various conditions for shooting by the drive recorder, recording or transmitting the multiplexed data by operating the operation unit 37.

An event detection unit 38 is connected to the control unit 34. The event detection unit 38 detects the occurrence of an event such as an impact on the own vehicle. The event detection unit 38 can be composed of an acceleration sensor. The event detection unit 38 may detect sudden acceleration (sudden start) or sudden deceleration of the own vehicle as an event. When the event detection unit 38 detects the occurrence of an event, the event detection unit 38 supplies the control unit 34 with a detection signal indicating that the event has occurred. The operation of the drive recorder when the control unit 34 receives the event occurrence detection signal will be described later.

In configuring the drive recorder shown in FIG. 1, the proper use of hardware and software is arbitrary. The video coding unit 11 and the audio coding unit 21 may be configured by a video coding circuit and an audio coding circuit, respectively, or may be configured by software. The video coding unit 11 and the audio coding unit 21 may be integrated.

The video data buffer 12, the audio data buffer 22, and the multiplexed data buffer 31 may be configured by a storage unit such as RAM, or may be configured by software. The multiplexing unit 30 may be configured by a multiplexing circuit or may be configured by software.

The recording medium 33 is, for example, a memory card. The recording medium I / F 32 is composed of hardware and software. The control unit 34 can be configured by a central processing unit (CPU). The storage unit 35 can be configured by a ROM or RAM which is a non-temporary storage medium. The network I / F36 is composed of hardware and software.

The control unit 34 may control the imaging unit 10 in addition to controlling the recording / playback of the multiplexed data and the network transfer, and also controls the video coding unit 11 and the audio coding unit 21. There may be things. In FIG. 1, the multiplexed data obtained by multiplexing the video data and the audio data is recorded on the recording medium 33 and transferred to the network, but the recorded and transmitted data is not limited to the multiplexed data. .. Only video data (moving image data) may be recorded and transmitted.

2 to 16, how the multiplexed data is recorded on the recording medium 33 and transferred to the network will be described. FIG. 2 shows an example of the logical structure of the recording medium 33. The recording medium 33 has a ring buffer area 33A for recording multiplexed data in a ring buffer format, and an event recording area 33B. The ring buffer area 33A has a capacity for recording the multiplexed data for a predetermined time such as one hour, and cyclically records the multiplexed data.

The event recording area 33B is divided into a plurality of sectors, and the first sector is MBR (Master Boot Record) 331. A FAT (File Allocation Table) area 332 is provided by a plurality of sectors, and a user data area 333 is provided by a plurality of sectors.

In the FAT area 332, a file allocation table based on the FAT 32 is recorded as an example. The file allocation table is a management table that manages the data recorded in the user data area 333. Multiplexed data, which is an example of user data, is recorded in the user data area 333.

In the present embodiment, since the control unit 34 directly manages the files to be recorded in the ring buffer area 33A, the ring buffer area 33A is not provided with the MBR and the file allocation table. However, the MBR and the file allocation table may be provided in the ring buffer area 33A, and the file allocation table may manage the files to be recorded in the ring buffer area 33A.

As shown in FIG. 3, the ring buffer area 33A and the user data area 333 are divided into a plurality of clusters, and data is recorded in the ring buffer area 33A and the user data area 333 in cluster units. The file allocation table in the event recording area 33B manages the data recorded in the user data area 333 on a cluster-by-cluster basis.

It is assumed that the event detection unit 38 detects the occurrence of an event at the time ts shown in FIG. 4 and supplies the detection signal to the control unit 34. In response to the detection of the occurrence of the event, the control unit 34 multiplexes the clusters after the cluster recorded at the time tp (first time) that goes back by the period T1 (first period) from the event occurrence time ts. The data is sequentially written in the user data area of the event recording area 33B. The control unit 34 sequentially writes the multiplexed data to the user data area from the event occurrence time ts to the cluster recorded at the time tf (second time) when the period T2 (second period) has elapsed.

That is, the multiplexed data of the plurality of clusters hatched in FIG. 4 is copied to the event recording area 33B as the moving image to be transferred, and is transferred to the network as described later. The periods T1 and T2 are, for example, 30 seconds and 2 minutes, respectively. Of the moving images to be transferred, the multiplexed data before the event occurrence time ts is the multiplexed data already recorded in the ring buffer area 33A, and the multiplexed data after the event occurrence time ts is newly added to the ring buffer area 33A. It is the multiplexed data to be recorded.

In order to prevent the plurality of hatched clusters in the ring buffer area 33A from being overwritten, the control unit 34 may set an overwrite prohibition flag to prohibit the plurality of hatched clusters from being overwritten. When a plurality of hatched clusters are copied to the event recording area 33B and transferred to a file, the control unit 34 should release the overwrite prohibition flag.

The control unit 34 opens the file when trying to copy the multiplexed data stored in the ring buffer area 33A to the event recording area 33B and transfer the file. As shown in FIG. 5, when the file is opened, the control unit 34 records the header Hm1 for the master recording clip (recording file) in a predetermined cluster of the user data area 333, and records the header Hm1 in another predetermined cluster. , The header Hf1 for the FTP transfer recording clip (transfer file) is recorded. The location of the cluster that records the headers Hm1 and Hf1 is arbitrary. The header Hf1 and the headers Hf2 and Hf3 described later are the first headers, and the header Hm1 is the second header.

The master recording clip (recording clip for FTP transfer) here is a moving image file in any format such as AVI, MP4, MOV, and the like. In the present embodiment, the master recording clip has a file structure including a header, data, and a footer, which is a general structure of a moving image file. The master recording clip may have a file structure without headers or footers.

In FIGS. 5 to 16, to the right of the user data area 333, the management information of the master recording clip on the file allocation table and the management information of the FTP transfer recording clip are conceptually shown at each timing. .. The management information of the master recording clip indicates the status of the master recording clip managed by the file allocation table, and the management information of the FTP transfer recording clip is the FTP transfer record managed by the file allocation table. Shows the state of the clip.

The master recording clip is a clip for recording the multiplexed data as a file on the recording medium 33, and the FTP transfer recording clip is a clip for recording the multiplexed data for network transfer. In the present embodiment, the network I / F 36 transfers the multiplexed data to the network in accordance with FTP (File Transfer Protocol). Hereinafter, network transfer will be referred to as FTP transfer.

As shown in FIG. 6, the control unit 34 sequentially records the multiplexing data recording unit RU1 in cluster units from the cluster following the header Hm1 for the master recording clip. The location of the cluster that records the recording unit RU1 is an example. The recording unit RU1 and the recording unit after the recording unit RU2 described later are collectively referred to as the recording unit RU. The recording unit RU is, for example, multiplexed data having a recording time of 10 seconds.

The recording unit RU may be multiplexed data in a predetermined fixed size unit, or may be multiplexed data in a fixed recording time and a fixed size unit, with the recording time variable. In the latter case, the maximum size assumed from the bit rate may be a fixed size.

The recording unit RU is unit data when the network I / F 36 transfers the multiplexed data by FTP. As described above, the unit data may be a predetermined time of, for example, 10 seconds, or a predetermined size. The time or size of the unit data is preset by the user operating the operation unit 37.

As shown in FIG. 7, when the recording medium I / F 32 completes the recording of the recording unit RU1, the control unit 34 records the footer Ff1 for the FTP transfer recording clip in the predetermined cluster of the user data area 333. .. The footer Ff1 and the footers Ff2 and Ff3 described later are the first footers.

In addition to this, the control unit 34 records the management information of the FTP transfer recording clip including the recording unit RU1 on the file allocation table. The management information of the FTP transfer recording clip associates the recording unit RU1 with the header Hf1 and the footer Ff1. By associating the recording unit RU1 with the header Hf1 and the footer Ff1, the file of the FTP transfer recording clip including the recording unit RU1 is closed.

The network I / F 36 starts the FTP transfer of the FTP transfer recording clip including the recording unit RU1 based on the control by the control unit 34. As shown in FIG. 8, during the FTP transfer, the control unit 34 sequentially records the multiplexed data recording unit RU2 in cluster units from the cluster following the recording unit RU1. FIG. 8 shows a state in which a part of the recording unit RU2 is recorded in one cluster. The location of the cluster that records the recording unit RU2 is an example.

As shown in FIG. 9, when the network I / F36 completes the FTP transfer of the FTP transfer recording clip including the recording unit RU1, the control unit 34 erases the header Hf1 and the footer Ff1 recorded in the user data area 333. By doing so, the management information of the FTP transfer recording clip including the recording unit RU1 is erased. The recording unit RU1 recorded in the user data area 333 is maintained as it is.

Further, the control unit 34 records the management information of the master recording clip including the recording unit RU1 on the file allocation table. The management information of the master recording clip associates the recording unit RU1 with the header Hm1. In FIG. 9, a part of the recording unit RU2 is recorded over three clusters.

As shown in FIG. 10, when the recording medium I / F 32 completes the recording of the recording unit RU2 for 10 seconds, the control unit 34 puts the header Hf2 for the FTP transfer recording clip in the predetermined cluster of the user data area 333. To record. Subsequently, as shown in FIG. 11, the control unit 34 records the footer Ff2 for the FTP transfer recording clip in the predetermined cluster of the user data area 333.

In addition to this, the control unit 34 records the management information of the FTP transfer recording clip including the recording unit RU2 on the file allocation table. The management information of the FTP transfer recording clip associates the recording unit RU2 with the header Hf2 and the footer Ff2. By associating the recording unit RU2 with the header Hf2 and the footer Ff2, the file of the FTP transfer recording clip including the recording unit RU2 is closed.

Similarly, the network I / F 36 starts the FTP transfer of the FTP transfer recording clip including the recording unit RU2 based on the control by the control unit 34. As shown in FIG. 12, during the FTP transfer, the control unit 34 sequentially records the multiplexed data recording unit RU3 in cluster units from the cluster following the recording unit RU2. FIG. 12 shows a state in which a part of the recording unit RU3 is recorded in one cluster. The location of the cluster that records the recording unit RU3 is an example.

As shown in FIG. 13, when the network I / F 36 completes the FTP transfer of the FTP transfer recording clip including the recording unit RU2, the control unit 34 erases the header Hf2 and the footer Ff2 recorded in the user data area 333. By doing so, the management information of the FTP transfer recording clip including the recording unit RU2 is erased. The recording unit RU2 recorded in the user data area 333 is maintained as it is.

When the control unit 34 erases the management information of the FTP transfer recording clip including the recording unit RU2, the control unit 34 transfers the management information of the master recording clip on the file allocation table to the recording unit RU1 included in advance with the recording unit RU2. Update to merged (combined) management information. In FIG. 13, a part of the recording unit RU3 is recorded over three clusters.

In this way, when the recording medium I / F 32 records the new recording unit RU in the user data area 333 and records the management information of the FTP transfer recording clip on the file allocation table, the control unit 34 transfers the FTP. Delete the management information after sending the recording clip. Each time the control unit 34 erases the management information of the FTP transfer recording clip, the control unit 34 updates the management information of the master recording clip to the management information obtained by merging the new recording unit RU with the recording unit RU included in advance. ..

As shown in FIG. 14, when the recording medium I / F 32 completes the recording of the recording unit RU3 for 10 seconds, the control unit 34 puts the header Hf3 for the FTP transfer recording clip in the predetermined cluster of the user data area 333. To record. Subsequently, as shown in FIG. 15, the control unit 34 records the footer Ff3 for the FTP transfer recording clip in the predetermined cluster of the user data area 333.

In addition to this, the control unit 34 records the management information of the FTP transfer recording clip including the recording unit RU3 on the file allocation table. The management information of the FTP transfer recording clip associates the recording unit RU3 with the header Hf3 and the footer Ff3. By associating the recording unit RU3 with the header Hf3 and the footer Ff3, the file of the FTP transfer recording clip including the recording unit RU3 is closed.

The network I / F 36 transfers the FTP transfer recording clip including the recording unit RU3 by FTP based on the control by the control unit 34. The same operation is repeated after the recording unit RU4 following the recording unit RU3.

When the copying of the multiplexed data of all the clusters shown with hatches in FIG. 4 to the event recording area 33B is completed, the control unit 34 transfers the multiplexed data to the cluster following the last recording unit RUN, as shown in FIG. Record the footer Fm1 for the master recording clip. The position of the cluster that records the footer Fm1 is arbitrary. The footer Fm1 is the second footer. In the present embodiment, n of the recording unit RUN is about 15.

In addition to this, the control unit 34 transfers the management information of the master recording clip on the file allocation table to the management information obtained by merging the recording unit RUN into the recording units RU1 to RU (n-1) included in advance. And update. By associating the recording units RU1 to RUN with the header Hm1 and the footer Fm1, the file of the master recording clip is closed.

As can be seen from the above, according to the data recording transmission device, the data recording transmission method, and the data recording transmission program of the present embodiment, the multiplexed data is FTP-transferred at predetermined time intervals such as 10 seconds, and thus network transfer is performed. Immediacy can be improved. Since the multiplexed data is transferred by FTP at predetermined time intervals, the time for network transfer can be shortened, and the load on the network does not increase.

Further, as can be seen from FIG. 16, according to the data recording transmission device, the data recording transmission method, and the data recording transmission program of the present embodiment, the multiplexing data is individually transferred to the recording medium 33 by FTP. It is recorded as one file containing all RU1 to RUN. The moving image data transferred to the outside of the insurance company, etc. via the network is recorded as one file in the event recording area 33B, and is not recorded as a file divided for each of the recording units RU1 to RUN transferred by FTP. Excellent convenience. The moving image data (file) recorded in the user data area 333 is maintained in the recorded state without being erased after being transferred to the network.

Using the flowcharts shown in FIGS. 17 and 18, the operation of the data recording / transmitting device of the present embodiment, the processing executed by the data recording / transmitting method of the present embodiment, and the data recording / transmitting program of the present embodiment are transmitted to the control unit 34. The process to be executed will be described.

In FIG. 17, the control unit 34 determines in step S1 whether or not an event has occurred depending on whether or not the detection signal from the event detection unit 38 has been received. If no event occurs (NO), the control unit 34 repeats the process of step S1. If an event occurs (YES), the control unit 34 sets the time tp before the event occurrence time ts by the period T1 and the time tf by the period T2 in step S2. Subsequently, in step S3, the control unit 34 transfers the multiplexed data of the cluster from the time tp to the time tf by FTP, and ends the process.

FIG. 18 shows the detailed processing of step S3. In FIG. 18, the control unit 34 opens the file in step S301 and sets the master recording clip and the FTP transfer recording clip. Specifically, as shown in FIG. 5, the control unit 34 records the header Hm1 for the master recording clip and the header Hf1 for the FTP transfer recording clip in the user data area 333.

In step S302, the control unit 34 starts recording a data clip composed of multiplexed data. In step S303, the control unit 34 determines whether or not the time tf has been reached. If the time tf has not been reached (NO), the control unit 34 determines in step S304 whether or not FTP transfer is in progress. If the FTP transfer is in progress (YES), the control unit 34 determines in step S305 whether or not the FTP transfer is completed.

If the FTP transfer is completed in step S305 (YES), the control unit 34 merges the transferred FTP transfer clip into the master recording clip in step S306, and the header and footer for the FTP transfer clip. Is deleted, and the process proceeds to step S307. If the FTP transfer is not completed in step S305 (NO), the control unit 34 shifts the process to step S307.

In step S306 and step S314 described later, merging the transferred FTP transfer clip into the master recording clip means that the management of unit data managed by the management information of the FTP transfer clip on the file allocation table is mastered. It means shifting to management based on management information of recording clips.

In step S307, the control unit 34 determines whether or not the recording time for FTP transfer has been reached. If the recording time for FTP transfer has not been reached (NO), the control unit 34 repeats the processes of steps S303 to S307.

If the recording time for FTP transfer has been reached in step S307 (YES), the control unit 34 records the footer Ff1 and the like as described above in step S308, closes the file, and closes the FTP transfer clip. Generate. Subsequently, the control unit 34 starts the FTP transfer of the FTP transfer clip in step S309, starts the recording of a new data clip in step S310, and returns the process to step S303.

On the other hand, if the time tf is reached in step S303 (YES), the control unit 34 closes the file and generates an FTP transfer clip in step S311. In step S312, the control unit 34 transfers the FTP transfer clip by FTP. In step S313, the control unit 34 determines whether or not all the FTP transfers have been completed. If all the FTP transfers are not completed (NO), the control unit 34 repeats the processes of steps S312 and S313.

If all the FTP transfers have been completed in step S313 (YES), the control unit 34 merges the transferred FTP transfer clips into the master recording clip in step S314, and headers for the FTP transfer clips. And the footer is erased to end the process.

The present invention is not limited to the present embodiment described above, and various modifications can be made without departing from the gist of the present invention. The data recording transmission program may be transmitted to the drive recorder via the network and installed in the storage unit 35.

10 Imaging unit 11 Video coding unit 12 Video data buffer 20 Audio acquisition unit 21 Audio coding unit 22 Audio data buffer 30 Multiplexing unit 31 Multiplexed data buffer 32 Recording medium interface 33 Recording medium 34 Control unit 35 Storage unit 36 Network interface 37 Operation unit 38 Event detection unit

Claims (5)

A recording medium interface for recording moving image data on a recording medium,
A network interface that transmits moving image data recorded on the recording medium to the outside via a network, and
A control unit that controls recording of moving image data on the recording medium and transmission of moving image data recorded on the recording medium to the outside via a network.
With
The recording medium has a ring buffer area for cyclically recording moving image data and an event recording area for copying the moving image data recorded in the ring buffer area and transmitting the moving image data to the outside.
The control unit
In response to the detection of the occurrence of a predetermined event, the first time that is only the first period before the event occurrence time and the second time that is after the second period from the event occurrence time are set.
The moving image data recorded in the ring buffer area or newly recorded from the first time to the second time is copied to the event recording area as a moving image to be transferred, and the network interface. When sending to the outside by
When the recording medium interface records moving image data having a predetermined time or a predetermined size among the moving images to be transferred in the event recording area as unit data, it is placed on the management table recorded in the event recording area. , Record the management information of the transfer file including the unit data,
The transfer file is transmitted to the outside via the network by the network interface.
After the transfer file is transmitted, the management information of the transfer file on the management table is deleted, and the management information of the recording file including the unit data is recorded on the management table.
The recording medium interface records new unit data in the event recording area, records the management information of the transfer file on the management table, and deletes the management information of the transfer file after the transfer file is transmitted. A data recording transmission device that updates the management information of the recording file to management information in which the new unit data is combined with the unit data included in advance. The recording medium interface records a first header and a first footer for the transfer file associated with the unit data in the event recording area.
The control unit
On the management table, as management information of the transfer file, management information including the unit data, the first header, and the first footer is recorded.
The first aspect of claim 1, wherein the management information of the transfer file is erased by erasing the first header and the first footer recorded in the event recording area after the transfer file is transmitted. Data recording transmitter. The recording medium interface is
When starting recording of moving image data in the event recording area, a second header for the recording file is recorded in the event recording area.
When the recording of the moving image data in the event recording area is finished, the second footer for the recording file is recorded in the event recording area.
The control unit includes one unit data including a plurality of unit data coupled to each other in the event recording area, the second header, and the second footer after the recording of the moving image data in the event recording area is completed. Management information including the plurality of unit data, the second header, and the second footer as management information of the recording file on the management table so that the recording file is recorded. The data recording transmission device according to claim 2. Circular recording of moving image data to the ring buffer area in the recording medium, copying of moving image data recorded in the ring buffer area to the event recording area in the recording medium, and moving image copied to the event recording area. The control unit that controls the transmission of data to the outside via the network
In response to the detection of the occurrence of a predetermined event, the first time that is only the first period before the event occurrence time and the second time that is after the second period from the event occurrence time are set.
The moving image data recorded in the ring buffer area or newly recorded from the first time to the second time is used as the moving image to be transferred, and the recording medium interface transfers the moving image data to the event recording area. After recording the moving image data of the target moving image at a predetermined time or a predetermined size as unit data, the management information of the transfer file containing the unit data is placed on the management table recorded in the event recording area. Record and
The transfer file is transmitted to the outside via the network by the network interface.
After the transfer file is transmitted, the management information of the transfer file on the management table is deleted, and the management information of the recording file including the unit data is recorded on the management table.
The recording medium interface records new unit data in the event recording area, records the management information of the transfer file on the management table, and deletes the management information of the transfer file after the transfer file is transmitted. A data recording transmission method for updating the management information of the recording file to management information in which the new unit data is combined with the unit data included in advance. Mounted on a drive recorder including a recording medium having a ring buffer area for cyclically recording moving image data and an event recording area for copying the moving image data recorded in the ring buffer area and transmitting it to the outside. To the computer that is
When the occurrence of a predetermined event is detected, a step of setting a first time only by the first period before the event occurrence time and a second time after the event occurrence time by the second period, and
The moving image data recorded in the ring buffer area or newly recorded from the first time to the second time is used as the moving image to be transferred, and the recording medium interface transfers the moving image data to the event recording area. After recording the moving image data of the target moving image at a predetermined time or a predetermined size as unit data, the management information of the transfer file containing the unit data is placed on the management table recorded in the event recording area. And the steps to record
The step of transmitting the transfer file to the outside via the network by the network interface, and
After the transfer file is transmitted, the management information of the transfer file on the management table is deleted, and the management information of the recording file including the unit data is recorded on the management table.
The recording medium interface records new unit data in the event recording area, records the management information of the transfer file on the management table, and deletes the management information of the transfer file after the transfer file is transmitted. For each step, the management information of the recording file is updated to the management information in which the new unit data is combined with the unit data included in advance.
A data recording transmission program that executes.

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