JP7276041B2 - Data record transmission device, data record transmission method, and data record transmission program - Google Patents

Description

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

In recent years, drive recorders that capture images of the surroundings of a vehicle have become popular. As described in Patent Literature 1, a drive recorder writes moving image data obtained by photographing the surroundings of a vehicle in 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 moving image data of 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 using a file transfer technique as described in Patent Document 2.

JP 2019-28763 A JP 2018-6957 A

A conventional drive recorder creates a moving image file for transfer and then transfers the moving image file over a network. Therefore, it takes a predetermined amount of time until the network transfer of the moving image file is completed. If the drive recorder is damaged by fire or the like due to an accident, the moving image file cannot be transferred over the network.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a data recording/transmitting device, a data recording/transmitting method, and a data recording/transmitting program capable of improving the immediacy of network transfer of moving image files.

According to a first aspect of the present invention, a recording medium interface for recording moving image data on a recording medium; a network interface for transmitting the moving image data recorded on the recording medium to the outside via a network; A data recording/transmitting device is provided, comprising a control unit for controlling recording of moving image data on the recording medium and transmission of the moving image data recorded on the recording medium to the outside via a network.
In the data recording and transmitting apparatus described above, the recording medium includes a ring buffer area for cyclically recording moving image data and an event buffer area for copying and transmitting the moving image data recorded in the ring buffer area to the outside. a recording area, wherein, in response to detection of occurrence of a predetermined event, the control unit stores a first time that is a first period before the event occurrence time and a second period from the event occurrence time. and a second time that is later than the above, and 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. , a moving image of a predetermined time or a predetermined size among the moving images to be transferred, which is stored in the event recording area by the recording medium interface when the moving image is copied to the event recording area and transmitted to the outside through the network interface; 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 transferred via the network by the network interface. After transmitting the transfer file, the management information of the transfer file on the management table is erased, and the management information of the recording file containing 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 records the management information of the transfer file after transmitting the transfer file. Each time the recording file is erased, the management information of the recording file is updated to management information in which the new unit data is combined with the previously included unit data.

According to the second aspect of the present invention, cyclic 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, and a control unit for controlling transmission of the moving image data copied to the event recording area to the outside via a network, in response to detection of occurrence of a predetermined event, before the event occurrence time by a first period. and a second time after the event occurrence time by a second period, and from the first time recorded in the ring buffer area or newly recorded The moving image data up to the second time is set as the moving image to be transferred, and the recording medium interface sets the moving image data of the moving image to be transferred, which has a predetermined time or a predetermined size, as unit data in the event recording area. After recording, the management information of the transfer file containing 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. and deleting the management information of the transfer file on the management table after transmitting the transfer file, recording the management information of the recording file including the unit data on the management table, and recording 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 and transmission method is provided for updating management information of a file for recording to management information in which the new unit data is combined with the previously included unit data.

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 and transmitting the moving image data recorded in the ring buffer area to the outside. When the occurrence of a predetermined event is detected in a computer installed in a drive recorder equipped with a recording medium having a first time that is a first period before the event occurrence time and a first time from the event occurrence time setting a second time after a period of 2; As a moving image to be transferred, when the recording medium interface records moving image data having a predetermined time or a predetermined size among the moving images to be transferred as unit data in the event recording area, it is recorded in the event recording area. a step of recording management information of a transfer file including the unit data on a management table in which the transfer file is stored; a step of sending the transfer file to the outside via a network using a network interface; and a step of sending the transfer file a step of erasing management information of the file for transfer on the management table and recording management information of the file for recording including the unit data on the management table; new unit data is recorded in the management table, management information of the transfer file is recorded on the management table, and management of the recording file is performed each time the management information of the transfer file is deleted after transmission of the transfer file. and updating information to management information combining said new unit data with said previously contained unit data.

According to the data recording/transmitting device, data recording/transmitting method, and data recording/transmitting program of the present invention, it is possible to improve the immediacy of network transfer of moving image files.

1 is a block diagram showing a configuration example of a drive recorder equipped with a data recording/transmitting device according to an embodiment; FIG. FIG. 2 is a diagram showing an example of the logical structure of a recording medium; FIG. 2 is a diagram conceptually showing a ring buffer area of a recording medium and a user data area of an event recording area; FIG. FIG. 10 is a diagram showing clusters copied from the ring buffer area to the user data area of the event recording area when an event occurs; FIG. 10 is a diagram showing a state in which a header for a master recording clip and a header for a recording clip for FTP transfer are recorded in a user data area immediately after opening a file; FIG. 5 is a diagram showing a state in which a recording unit RU1 of multiplexed data is recorded in the user data area, continued from FIG. Continuing from FIG. 6, the footer for the recording clip for FTP transfer including the recording unit RU1 is recorded in the user data area, and the management information for the recording clip for FTP transfer including the recording unit RU1 is recorded on the file allocation table. It is a figure which shows the recorded state. FIG. 8 is a diagram showing a state immediately after starting the transfer of the recording clip for FTP transfer including the recording unit RU1 and starting the recording of the recording unit RU2 of the multiplexed data, following FIG. FIG. 8 is a diagram illustrating a state in which transfer of recording clips for FTP transfer including recording unit RU1 has been completed, and management information of master recording clips has been recorded on the file allocation table, following FIG. FIG. 10 is a diagram showing a state in which the recording of the recording unit RU2 is completed and the header for the recording clip for FTP transfer including the recording unit RU2 is recorded in the user data area, following FIG. Continuing from FIG. 10, the footer for the recording clip for FTP transfer including the recording unit RU2 is recorded in the user data area, and the management information for the recording clip for FTP transfer 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 starting the transfer of the recording clip for FTP transfer including the recording unit RU2 and starting the recording of the recording unit RU3 of the multiplexed data, following FIG. Continuing from FIG. 12, the transfer of the recording clip for FTP transfer 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. FIG. 10 is a diagram showing a state in which the FIG. 13 is a diagram showing a state in which the recording of the recording unit RU3 is completed and the header for the recording clip for FTP transfer including the recording unit RU3 is recorded in the user data area, following FIG. Continuing from 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. Copying of the last cluster is completed, a footer for the master recording clip is recorded in the user data area, and management information of the master recording clip including recording units RU1 to RU3 is recorded on the file allocation table. It is a figure which shows a state. 4 is a flow chart showing overall processing from detection of occurrence of an event by the drive recorder to FTP transfer. It is a specific process of step S3 shown in FIG. 4 is a flow chart showing processing to be executed by the .

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

In FIG. 1 , an image capturing unit 10 captures an image of the surroundings (front, rear, or all directions) of the own vehicle, and supplies a video signal obtained by capturing the image of the surroundings of the own vehicle to the image encoding unit 11 . The imaging unit 10 has a plurality of lenses and an imaging element that is a CCD (Charge Coupled Device) or CMOS (Complementary Metal-Oxide-Semiconductor). When the imaging unit 10 outputs a digital video signal, the digital video signal is directly supplied to the video encoding unit 11 . When the imaging unit 10 outputs an analog video signal, it may be converted into a digital signal by an A/D converter (not shown) and supplied to the video encoding unit 11 .

A video encoder 11 compresses and encodes a video signal in a predetermined format, and a video data buffer 12 temporarily stores the encoded video data.

The voice acquisition unit 20 has a microphone, acquires voices inside or around the own vehicle, and supplies voice signals to the voice encoding unit 21 . The audio signal is converted into a digital signal by an A/D converter (not shown) and supplied to the audio encoder 21 . An audio encoder 21 compresses and encodes an audio signal in a predetermined format, and an audio data buffer 22 temporarily stores the encoded audio 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 can be in any format. A multiplexed data buffer 31 temporarily stores multiplexed data.

The control unit 34 executes the data recording/sending program stored in the storage unit 35 to record and reproduce the multiplexed data on the recording medium 33, and transmit the multiplexed data to the outside such as an insurance company via the network. Control network transfers.

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

An operation unit 37 is connected to the control unit 34 . A user of the drive recorder can set various conditions for photographing by the drive recorder and recording or transmission of multiplexed data by operating the operation unit 37 .

An event detector 38 is also connected to the controller 34 . The event detection unit 38 detects the occurrence of an event such as an impact on the own vehicle. The event detector 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 constructing the drive recorder shown in FIG. 1, it is optional to use hardware and software separately. The video encoding unit 11 and the audio encoding unit 21 may be configured by a video encoding circuit and an audio encoding circuit, respectively, or may be configured by software. The video encoding unit 11 and the audio encoding 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 that is a non-temporary storage medium. The network I/F 36 is composed of hardware and software.

The control unit 34 may control the imaging unit 10 in addition to controlling recording/playback of multiplexed data and network transfer, and may also control the video encoding unit 11 and the audio encoding unit 21. It may happen. 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 over the network, but the data to be recorded and transmitted is not limited to the multiplexed data. . Only video data (moving image data) may be recorded and transmitted.

How the multiplexed data is recorded on the recording medium 33 and transferred over the network will be described with reference to FIGS. 2 to 16. FIG. FIG. 2 shows an example of the logical structure of the recording medium 33. As shown in FIG. 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 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 leading sector is an MBR (Master Boot Record) 331. FIG. 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.

A file allocation table based on FAT32 is recorded in the FAT area 332 as an example. A file allocation table is a management table for managing 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 this embodiment, since the control unit 34 directly manages files to be recorded in the ring buffer area 33A, the ring buffer area 33A is not provided with an MBR and a file allocation table. However, an MBR and a file allocation table may be provided in the ring buffer area 33A, and the files recorded in the ring buffer area 33A may be managed by the file allocation table.

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 are recorded in the ring buffer area 33A and the user data area 333 in units of clusters. The file allocation table in the event recording area 33B manages data recorded in the user data area 333 in units of clusters.

Assume that the event detection unit 38 detects the occurrence of an event at time ts shown in FIG. 4 and supplies a detection signal to the control unit 34 . In response to the detection of the occurrence of an event, the control unit 34 multiplexes the cluster after the cluster recorded at the time tp (first time) preceding the event occurrence time ts by the period T1 (first period). data is written in order 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 up to the cluster recorded at the time tf (second time) after the period T2 (second period) from the event occurrence time ts.

That is, the multiplexed data of a plurality of clusters hatched in FIG. 4 are copied to the event recording area 33B as the moving image to be transferred, and are transferred to the network as described later. The periods T1 and T2 are for example 30 seconds and 2 minutes respectively. Among 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 recorded in the ring buffer area 33A. This is multiplexed data to be recorded.

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

The control unit 34 opens the file when copying the multiplexed data stored in the ring buffer area 33A to the event recording area 33B and transferring 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 in the user data area 333, and records the header Hm1 in another predetermined cluster. , the header Hf1 for the recording clip for FTP transfer (file for transfer) is recorded. The position of the cluster where the headers Hm1 and Hf1 are recorded is arbitrary. The header Hf1 and headers Hf2 and Hf3, which will be described later, are the first headers, and the header Hm1 is the second header.

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

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

A master recording clip is a clip for recording multiplexed data as a file on the recording medium 33, and a recording clip for FTP transfer is a clip for recording multiplexed data for network transfer. In this embodiment, the network I/F 36 transfers the multiplexed data over the network in compliance with FTP (File Transfer Protocol). Network transfer is hereinafter referred to as FTP transfer.

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

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

A recording unit RU is unit data when the network I/F 36 FTP-transfers multiplexed data. As described above, a predetermined time such as 10 seconds or a predetermined size may be used as unit data. The time or size of unit data is set in advance 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 a footer Ff1 for the recording clip for FTP transfer in a predetermined cluster in the user data area 333. . A footer Ff1 and footers Ff2 and Ff3, which will be described later, are first footers.

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

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

As shown in FIG. 9, when the network I/F 36 completes the FTP transfer of the recording clip for FTP transfer including the recording unit RU1, the control section 34 deletes the header Hf1 and footer Ff1 recorded in the user data area 333. By doing so, the management information of the recording clip for FTP transfer including the recording unit RU1 is erased. The recording unit RU1 recorded in the user data area 333 is maintained as it is.

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

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

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

Similarly, the network I/F 36 starts FTP transfer of the recording clip for FTP transfer 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 section 34 sequentially records the recording unit RU3 of the multiplexed data in cluster units from the cluster following the recording unit RU2. FIG. 12 shows a state in which part of recording unit RU3 is recorded in one cluster. The position of the cluster recording the recording unit RU3 is an example.

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

After erasing the management information of the recording clip for FTP transfer 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 that is included in advance. Update to merged (combined) management information. In FIG. 13, part of the recording unit RU3 is recorded over three clusters.

In this way, after the recording medium I/F 32 records a new recording unit RU in the user data area 333 and records the management information of the recording clip for FTP transfer on the file allocation table, the control unit 34 performs FTP transfer. Delete the management information after sending the recording clip for use. Every time the control unit 34 erases the management information of the recording clip for FTP transfer, 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 previously included recording unit RU. .

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

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

Under the control of the control unit 34, the network I/F 36 FTP-transfers the recording clip for FTP transfer including the recording unit RU3. Similar operations are repeated for the recording unit RU4 following the recording unit RU3.

When the copying of the multiplexed data of all the clusters hatched in FIG. 4 to the event recording area 33B is completed, as shown in FIG. Record the footer Fm1 for the master recording clip. The position of the cluster recording the footer Fm1 is arbitrary. Footer Fm1 is the second footer. In this embodiment, n of the recording unit RUn is about 15.

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

As can be seen from the above, according to the data recording/transmitting device, data recording/transmitting method, and data recording/transmitting program of the present embodiment, multiplexed data is FTP-transferred at predetermined time intervals such as 10 seconds. Immediacy can be improved. Since the multiplexed data is FTP-transferred at predetermined time intervals, the network transfer time 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/transmitting device, the data recording/transmitting method, and the data recording/transmitting program of the present embodiment, the multiplexed data is individually FTP-transferred to the recording unit on the recording medium 33. It is recorded as one file including all of RU1 to RUn. The moving image data transferred to the outside such as an insurance company via a network is recorded in the event recording area 33B as one file, and is not recorded as separate files for each of the recording units RU1 to RUn transferred by FTP. Excellent convenience. Note that 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 and transmitting apparatus of this embodiment, the processing executed by the data recording and transmitting method of this embodiment, and the data recording and transmitting program of this embodiment are executed by the control unit 34. The processing to be executed will be explained.

17, in step S1, the control unit 34 determines 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), in step S2, the control unit 34 sets a time tp that precedes the event occurrence time ts by a period T1 and a time tf that follows the event occurrence time ts by a period T2. Subsequently, in step S3, the control unit 34 FTP-transfers the multiplexed data of the cluster from time tp to time tf, and terminates the process.

FIG. 18 shows detailed processing of step S3. In FIG. 18, in step S301, the control unit 34 opens a file and sets a master recording clip and a recording clip for FTP transfer. 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 recording clip for FTP transfer in the user data area 333 .

In step S302, the control unit 34 starts recording a data clip made up 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 FTP transfer is in progress. If the FTP transfer is in progress (YES), the control unit 34 determines whether the FTP transfer is completed in step S305.

If the FTP transfer has been completed in step S305 (YES), the control unit 34 merges the transferred FTP transfer clip into the master recording clip, and creates a header and footer for the FTP transfer clip in step S306. is erased, and the process proceeds to step S307. If the FTP transfer has not been completed in step S305 (NO), the control unit 34 causes the process to proceed to step S307.

In step S306 and step S314, which will be described later, merging the transferred FTP transfer clip into the master recording clip means that the management of the unit data managed by the management information of the FTP transfer clip on the file allocation table is transferred to the master recording clip. This means transitioning to management based on management information of recorded 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 processing of steps S303 to S307.

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

On the other hand, if the time tf has been 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 FTP-transfers the clip for FTP transfer. In step S313, the control unit 34 determines whether or not all FTP transfers have been completed. If all FTP transfers have not been completed (NO), the control unit 34 repeats the processes of steps S312 and S313.

If all FTP transfers have been completed in step S313 (YES), in step S314 the control unit 34 merges the transferred FTP transfer clip into the master recording clip, and creates a header for the FTP transfer clip. and delete the footer, and terminate the process.

The present invention is not limited to the embodiments 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 section 35 .

10 imaging unit 11 video encoding unit 12 video data buffer 20 audio acquisition unit 21 audio encoding 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 for transmitting moving image data recorded on the recording medium to the outside via a network;
a control unit that controls recording of moving image data on the recording medium and transmission of the 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 and transmitting the moving image data recorded in the ring buffer area to the outside,
The control unit
setting a first time a first period before the event occurrence time and a second time a second period after the event occurrence time in response to detection of occurrence of a predetermined event;
moving image data recorded or newly recorded in the ring buffer area from the first time to the second time as a moving image to be transferred to the event recording area; When sending out by
When the recording medium interface records, in the event recording area, moving image data having a predetermined time or a predetermined size among the moving images to be transferred as unit data, on the management table recorded in the event recording area, , recording management information of a transfer file containing the unit data;
sending the transfer file to the outside via the network by the network interface;
After transmitting the transfer file, erasing the management information of the transfer file on the management table, recording the management information of the recording file containing the unit data on the management table,
The recording medium interface records new unit data in the event recording area, records management information of the transfer file on the management table, and erases the management information of the transfer file after transmitting the transfer file. and updating the management information of the recording file to management information in which the new unit data is combined with the previously included unit data each time. 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
recording management information including the unit data, the first header, and the first footer on the management table as management information of the file for transfer;
2. 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 transmission of the transfer file. Data recording transmitter. The recording medium interface includes:
recording a second header for the recording file in the event recording area when starting to record moving image data in the event recording area;
recording a second footer for the recording file in the event recording area when recording the moving image data in the event recording area is finished;
After recording the moving image data in the event recording area, the control unit generates a single data unit including a plurality of unit data, the second header, and the second footer, which are combined in the event recording area. 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. 3. The data recording and transmitting device according to claim 2, wherein the data is recorded. Circular recording of moving image data in a ring buffer area in a recording medium, copying moving image data recorded in the ring buffer area to an event recording area in the recording medium, and moving image copied to the event recording area A control unit that controls transmission of data to the outside via a network,
setting a first time a first period before the event occurrence time and a second time a second period after the event occurrence time in response to detection of occurrence of a predetermined event;
The recording medium interface transfers moving image data recorded or newly recorded in the ring buffer area from the first time to the second time as a moving image to be transferred to the event recording area. When moving image data having a predetermined time or a predetermined size among the target moving images is recorded 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. record the
sending the transfer file to the outside via a network by a network interface;
After transmitting the transfer file, erasing the management information of the transfer file on the management table, recording the management information of the recording file containing the unit data on the management table,
The recording medium interface records new unit data in the event recording area, records management information of the transfer file on the management table, and erases the management information of the transfer file after transmitting the transfer file. and updating the management information of the recording file to management information in which the new unit data is combined with the previously included unit data each time the recording file is sent. Installed in a drive recorder having a recording medium having a ring buffer area for cyclically recording moving image data and an event recording area for copying and transmitting the moving image data recorded in the ring buffer area to the outside computer with
setting a first time that precedes the event occurrence time by a first period and a second time that follows the event occurrence time by a second period when the occurrence of a predetermined event is detected;
The recording medium interface transfers moving image data recorded or newly recorded in the ring buffer area from the first time to the second time as a moving image to be transferred to the event recording area. When moving image data having a predetermined time or a predetermined size among the target moving images is recorded 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 recording
a step of transmitting the file for transfer to the outside via a network using a network interface;
after transmitting the transfer file, 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;
The recording medium interface records new unit data in the event recording area, records management information of the transfer file on the management table, and erases the management information of the transfer file after transmitting the transfer file. updating the management information of the recording file to management information in which the new unit data is combined with the previously included unit data;
Data recording transmission program to run.

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