JP6598555B2 - RECORDING CONTROL DEVICE, RECORDING CONTROL METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to a technique for controlling a recording operation of a device that operates by wired power feeding.

  A surveillance camera that distributes image data to the outside via a network may have a function of saving an image on a non-volatile recording medium when an image cannot be transmitted due to a network abnormality or an event is detected. It is common. In particular, SD (Secure Digital) memory cards have been increased in capacity and improved in recording speed, and large-capacity image data can be held in the SD memory card.

  Moreover, the surveillance camera is generally supplied with power by a network cable using a method such as PoE (Power over Ethernet (registered trademark)) or PoE +. In such a surveillance camera, if the network cable is disconnected while the recording process to the nonvolatile recording medium is being performed, the power supply is cut off without performing the shutdown process (recording end process). Sometimes. If the shutdown process is not performed during the recording process to the nonvolatile recording medium and the power supply is cut off, the file system may be damaged depending on the timing.

  In order to solve this problem, Patent Document 1 discloses a technique in which when a power supply from a commercial power supply is cut off, an HDD (Hard Disk Drive) termination process is performed with power supplied by the PoE method. Are listed. Japanese Patent Application Laid-Open No. 2004-228561 also discloses a technique of providing a power source for backing up only the HDD separately from the AC power source, and preventing destruction of the HDD when a momentary power interruption is detected.

JP 2012-39470 A JP 2009-76155 A

  However, in the prior art disclosed in Patent Document 1 described above, a commercial power source is required separately from the power supply by the PoE or PoE + system. Therefore, there is a problem that data in the nonvolatile memory may not be properly recorded for a device used in an environment where a commercial power supply cannot be prepared. Further, in the conventional technique disclosed in Patent Document 2 described above, a power source for backing up the HDD is required.

  Accordingly, an object of the present invention is to provide a technique capable of appropriately ending data recording even when power supply is stopped.

As a means for solving the above problems, a recording control apparatus of the present invention has the following configuration. That is, the recording control apparatus, a communication unit capable of communicating with the outside via a communication cable, a power supply circuit capable of receiving power supply by at least one of the communication cable and a cable other than the communication cable, A recording control unit that operates by power supply by the power supply circuit and records data in a recording unit, and when a communication link between the communication unit and the outside has been established; In addition, it is possible to set in the recording control device whether to start processing for recording data in the recording means, and the recording control means is established from a state in which a communication link between the communication means and the outside is established. The recording end process is performed when it is not set and the setting for starting the process of recording data in the recording means is not set.

  According to the present invention, data recording can be appropriately terminated even when power supply is stopped.

It is a functional block diagram showing an imaging device having a recording control device in the first embodiment of the present invention. It is a flowchart for demonstrating the recording process in each embodiment of this invention. It is a figure for demonstrating the management information of the data in each embodiment of this invention. It is a flowchart for demonstrating the recording end process in 1st Embodiment of this invention. It is a functional block diagram which shows the imaging device which has a recording control apparatus in 2nd and 3rd embodiment of this invention. It is a flowchart for demonstrating the recording end process in 2nd Embodiment of this invention. It is a flowchart for demonstrating the recording end process in 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the configurations shown in the following embodiments are merely examples, and the present invention is not limited to the configurations described in the following embodiments. As an example, the imaging device of each embodiment is an imaging device capable of transmitting video data via a network. Such an imaging device is used for monitoring purposes, for example. Further, as an example, it is assumed that the imaging measure of each embodiment has a non-volatile recording medium on which a recording process is performed by a file system, and is supplied with power via a communication cable.

<First Embodiment>
FIG. 1 is a configuration diagram of an imaging apparatus having a recording control apparatus according to the first embodiment of the present invention.

  The imaging device 100 in the present embodiment includes an imaging unit 110 and a recording control device 120. The imaging device 100 captures a subject and generates moving image data. The recording control device 120 also has a function of transmitting image data captured by the imaging unit 110 to the external network device 130.

  First, the imaging unit 110 will be described. The imaging unit 110 includes an optical lens 111, an imaging element 112, a signal processing unit 113, an imaging control unit 114, and a transfer unit 115.

  The image sensor 112 receives light imaged through the optical lens 111 and converts the received light into electric charge to generate an image signal. For example, a CMOS image sensor (Complementary Metal Oxide Semiconductor Image Sensor) can be used for the image sensor 112. In addition, a CCD image sensor (Charge Coupled Device Image Sensor) may be used for the image sensor 112.

  The signal processing unit 113 digitizes the imaging signal converted by the imaging element 112 to generate image data. The signal processing unit 113 may compress and encode image data and generate encoded image data.

  The imaging control unit 114 controls the imaging element 112 to generate an image signal with the same cycle as the output cycle (frame rate) of the set image (frame). In addition, when it is necessary to make the accumulation time of the charge converted from the received light longer than the output period of the image, the image data is stored in the frame memory of the signal processing unit 113 during the period in which the image pickup signal cannot be output from the image pickup device 112. The signal processing unit 113 is controlled to hold.

  The transfer unit 115 transfers the image data digitized by the signal processing unit 113 to the primary recording unit 122 of the recording control device 120. The transfer unit 115 transfers image data in units of frames, for example.

  The imaging control unit 114, the signal processing unit 113, and the transfer unit 115 can be realized by one or a plurality of processors and a memory such as a RAM (Random Access Memory). When the processor executes a computer program stored in the memory, the processor and the memory cooperate to function as the imaging control unit 114, the signal processing unit 113, and the transfer unit 115. Note that a CPU, DSP, or the like can be used as the processor.

Next, the recording control device 120 will be described.
The recording control device 120 includes a control unit 121, a primary recording unit 122, a communication unit 123, a secondary recording unit 124, and a power supply circuit 125. The control unit 121 also functions as the recording control unit 1 and the communication control unit 2.

First, the hardware configuration of the recording control apparatus 120 will be described.
The control unit 121 can be realized by, for example, one or a plurality of processors and a memory such as a RAM (Random Access Memory). For example, a file system program or an OS program is loaded into the memory. The processor executes the computer program loaded in the memory, so that the processor and the memory cooperate to function as the control unit 121. Note that a CPU, DSP, or the like can be used as the processor. The memory may use the primary recording unit 122. In the present embodiment, it is assumed that the control unit 121 is realized by a CPU as an example.

  The file system is a program that defines a method for managing data recorded in the primary recording unit 122 and the secondary recording unit 124. In the file system, a method for managing data recorded in the primary recording unit 122 and the secondary recording unit 124 using files and folders (directories) is defined. The file system also defines a method for moving and deleting files and folders, a method for recording data, a method for recording management information, and the like. In addition, an address of a recording area (cache area) for temporarily recording image data in the primary recording unit 122 is also defined. The cache area can be arbitrarily set. As the file system, for example, FAT (File Allocation Table), NTFS (NT File System), ext (extended file system) 3, ext4, or the like can be used.

  The primary recording unit 122 can be realized by a volatile recording medium such as a RAM (Random Access Memory). The primary recording unit 122 functions as, for example, a cache memory that primarily records image data.

  The communication unit 123 can be realized by a network interface compliant with a standard such as Ethernet (registered trademark), for example.

  The secondary recording unit 124 can be realized by various nonvolatile recording media such as an SD memory card, an HDD, and an optical disk. The primary recording unit 122 is detachable from the recording control device 120, for example. In the present embodiment, as an example, it is assumed that the secondary recording unit 124 is realized by an SD memory card.

  The power supply circuit 125 can be realized using, for example, a converter, an inverter, a capacitor, a coil, a switching element, or the like. The power supply circuit 125 can temporarily store electric charge using a capacitor or the like. As a result, even after the external power supply is stopped, the power can be supplied to each unit within a few seconds. The element that stores the electric charge is not limited to the capacitor, and the electric charge may be temporarily stored by an element other than the capacitor.

  Next, the operation of the recording control apparatus 120 will be described. The image data transferred to the cache area of the primary recording unit 122 by the transfer unit 115 is transmitted to the external network device 130 through the communication unit 123 according to control by the communication control unit 2, for example. In each embodiment, communication is established between the communication unit 123 and an external network device 130 via a network cable. The communication unit 123 transmits image data to the external network device 130 through a network cable in a wired manner.

  Note that the control unit 121 may perform image processing such as luminance correction and color correction on the image data. The control unit 121 may perform object detection that detects an object such as a person from a captured image using a technique such as pattern matching. That is, the control unit 12 also functions as an image processing unit and an object detection unit.

  The network compatible device 130 is, for example, a monitor that displays an image captured by the imaging unit 110 or a recording device that records an image captured by the imaging unit 110.

  The recording control unit 1 records the image data transferred to the cache area of the primary recording unit 122 in the secondary recording unit 124 according to a predetermined rule. This predetermined rule is defined by, for example, a file system. The file system defines the timing at which the secondary recording unit 124 records the image data transferred to the primary recording unit 122. Further, a data unit for recording the image data in the secondary recording unit 124 is defined.

  Note that the recording control unit 1 may switch between the case where the image data is recorded in the secondary recording unit 124 and the case where the image data is not recorded in the secondary recording unit 124 according to the setting by the user. Further, for example, when applied to a monitoring camera, the recording control unit 1 may cause the secondary recording unit 124 to record image data when an event such as a person intrusion occurs. Further, the process of recording the image data in the secondary recording unit 124 may be started at a timing set by the user.

  Further, the recording control unit 1 creates management information based on the file system in order to record the image data recorded in the cache area of the primary recording unit 122 in the secondary recording unit 124. The recording control unit 1 performs recording control while referring to this management information.

  Here, the details of the management information created by the recording control unit 1 will be described with reference to FIG. As shown in FIG. 3, the recording control unit 1 is information in which a file name is associated with information related to the file. FIG. 3 shows the management information in a table format.

  Specifically, the management information is information including a file name and the first LBA (Logical Block Addressing) of the recording area in which the file is recorded. The management information is information in which the first LBA, the data size of the file, the time when the file was created (creation date and time), and the time when the file was last updated (update date and time) are associated with each other. .

  The LBA indicates an address in the recording medium, and the head LBA indicates the head address of the recording area where the file is recorded. In addition to LBA, an address may be specified by CHS (Cylinder Head Sector).

  The format of the management information shown in FIG. 3 is an example, and the management information may be information indicating at least where data constituting the file is recorded in the recording area. In the management information shown in FIG. 3, the last address can be derived from the head LBA and the data size. For example, data included in a file is generally recorded in a plurality of recording areas. As described above, when the addresses of the data included in the file are not continuous, the management information may include a plurality of LBA information indicating the addresses of the respective data.

  The recording control unit 1 may create a new file when recording of the secondary recording unit 124 stops, or create a new file when recording image data for a predetermined time (for example, 3 minutes). You may make it do.

  Further, the recording control unit 1 records management information relating to the file recorded in the secondary recording unit 124 in both the primary recording unit 122 and the secondary recording unit 124. The content of the management information recorded in the primary recording unit 122, the content of the management information recorded in the secondary recording unit 124, and the content actually recorded in the secondary recording unit 124 are synchronized, It is necessary to make sure there are no wrinkles.

  Next, the power supply circuit 125 will be described. The power supply circuit 125 receives power supply from an external device such as the network device 130 via a network cable. For example, using a method such as PoE (Power over Ethernet (registered trademark)) or PoE +, power is supplied (power is supplied) from the external network device 130 through a network cable. That is, the cable for transmitting and receiving data is the same as the cable for supplying power.

  The power supply circuit 125 converts the power received via the network cable into DC power suitable for each unit. Then, the power supply circuit 125 supplies the converted power to each unit of the imaging unit 110 and the recording control device 120.

  The power supply circuit 125 can temporarily store electric power (charge) supplied from the outside by using a capacitor or the like. Even after the external power supply is stopped by the temporarily stored electric charge, it is possible to supply power to each unit within a few seconds. Charges may be temporarily stored by an element other than the capacitor. Note that a general power supply circuit can be used as the power supply circuit 125. If the power consumption is about the same as that of an imaging device, an operation of about several seconds can be performed with a general power supply circuit.

  As described above, it is assumed that the network device 130 according to the present embodiment can not only receive the image data transmitted from the imaging apparatus 100 but also supply power to the imaging apparatus 100 through the network cable.

  Next, recording processing by the recording control unit 1 in each embodiment will be described using the flowchart shown in FIG. The flowchart shown in FIG. 2 can be executed by the CPU performing a process based on a program read into the memory.

  When power supply to each unit is started by the power supply circuit 125, the recording process starts.

  First, in step S21, the imaging unit 110 performs imaging to generate image data.

  In the next step S <b> 22, image data is transmitted from the recording control device 120 to the external network device 130.

  Specifically, the following processing is performed. First, the transfer unit 115 transfers the generated image data to the cache area of the primary recording unit 122 of the recording control device 120. The transfer unit 115 transfers image data in units of frames, for example. Then, the communication control unit 2 causes the communication unit 123 to transmit the image data transferred to the cache area of the primary recording unit 122 of the recording control device 120 to the external network device 130.

  Note that the recording control apparatus 120 and a plurality of network devices 130 may be connected via an Ethernet (registered trademark) hub or the like. In such a case, the network device that supplies power to the recording control apparatus 120 and the network device that transmits image data from the communication unit 123 are not necessarily the same network device.

  In the next step S <b> 23, the recording control unit 1 determines whether to record the image data transmitted from the communication unit 123 to the outside in the secondary recording unit 124. For example, the image data is recorded in the secondary recording unit 124 for the purpose of backing up the data.

  Specifically, for example, the recording control unit 1 confirms the setting by the user and determines whether to record image data in the secondary recording unit 124. Further, when an event such as an intrusion of a person occurs, when the image data is recorded in the secondary recording unit 124, the secondary recording unit 124 determines whether or not the event has occurred. It is determined whether to record image data.

  Note that image data may always be recorded in the secondary recording unit 124. In that case, step S23 can be omitted.

  If it is determined in step S23 that no image data is recorded in the secondary recording unit 124 (No), the process returns to step S21.

  When it is determined in step S23 that image data is recorded in the secondary recording unit 124 (Yes), the recording control unit 1 records image data in the secondary recording unit 124 in the next step S24. Specifically, the recording control unit 1 records the image data transferred from the transfer unit 115 and recorded in the cache area of the primary recording unit 122 in the secondary recording unit 124.

  Then, the recording control unit 1 updates the management information recorded in the primary recording unit 122 and the management information recorded in the secondary recording unit 124.

  For example, when the management information shown in FIG. 3 is updated, the update is performed as follows to add image data to movie3. That is, the recording control unit 1 increases the data size by the amount of the added image data. Then, the update date is updated. When image data is recorded in the secondary recording unit 124 for the first time, management information is newly created.

  Note that the image data recorded in the cache area of the primary recording unit 122 after being recorded in the secondary recording unit 124 may be deleted.

  The above is the recording process by the recording control unit 1 in each embodiment. When the communication connection (link) between the communication unit 123 and the network device 130 has been established, and the link between the communication unit 123 and the network device 130 has been established, the recording process of steps S21 to S24 is continued. When the link is established, the communication unit 123 and the network device 130 are in an electrically connected state. In addition, in a state where the link is established, the communication unit 123 and the network device 130 are normally in a communicable state. However, if a wrong IP address is assigned, the communication unit 123 and the network device 130 may be unable to communicate. possible.

  Next, recording end processing by the recording control unit 1 in the first embodiment will be described using the flowchart shown in FIG. The flowchart shown in FIG. 4 can be executed by the CPU performing processing based on the program read into the memory.

  The power supply to the imaging apparatus 100 may suddenly stop due to the network cable being disconnected or a power failure. When such a situation occurs, the content of the management information may not be synchronized with the content actually recorded in the secondary recording unit 124. If it does so, it will lead to that image data cannot be read normally, or image data will be damaged.

  In the recording end process described below, when it is detected that the communication link is disconnected and the link with the network device is not established (link down), the recording end process is performed. This recording end process is performed when the link is disconnected when power is supplied to the power supply circuit 125 through a network cable. When the cause of the link down is that the network cable is disconnected, the power supply to the power supply circuit 125 is stopped almost simultaneously with the disconnection of the link. However, by detecting link down, it is possible to detect a decrease in voltage, etc., and to detect the stop of power supply directly, until the residual charge existing inside disappears for a while, It is possible to continue the operation. In the method of directly detecting the voltage or the like, the imaging apparatus itself stops its operation immediately, so that it is difficult to appropriately perform the recording end process.

  When the communication control unit 2 detects that the communication link between the communication unit 123 and the network device 130 is broken and the link is down, the recording end process starts.

  Specifically, when the network cable is disconnected, the communication link between the communication unit 123 and the network device 130 is not established. In the state where the communication link is established, the communication unit 123 and the network device 130 exchange link pulses (signals) at a predetermined interval. When detecting that the link pulse is interrupted, the communication unit 123 inputs a link down signal indicating that the link has not been established to the communication control unit 2.

  When the link down signal is input, the communication control unit 2 detects that the link between the communication unit 123 and the network device 130 has not been established (link down).

  The link-down can occur in any state in which the processes in steps S21 to S25 are performed when the recording process shown in FIG. 2 is being performed. When the communication control unit 2 detects that the link is down, even if the recording process of steps S21 to S25 is being performed, the process being executed is stopped and an interrupt process is illustrated in FIG. Perform recording end processing.

  When interrupt processing occurs, the control unit 121 has a function of stopping processing based on the program being executed and calling and executing a pre-registered program. A program that is called when interrupt processing is performed is called a handler. The processing of steps S41 to S43 is executed according to this handler.

  In the next step S 41, the recording control unit 1 prohibits recording of new image data in the cache area of the primary recording unit 122.

  That is, the recording control unit 1 does not record new image data in the cache area of the primary recording unit 122 after the link is down.

  However, the data unit currently being recorded may be recorded, or recording may be stopped immediately. In any case, the management information in the primary recording unit 122 is updated so that the content of the image data indicated by the management information in the primary recording unit 122 and the content of the image data actually recorded in the secondary recording unit 124 are synchronized. That's fine. It should be noted that the recording can be terminated earlier if the recording of the data unit currently being recorded is stopped.

  In the next step S <b> 42, the recording control unit 1 determines whether there is image data recorded in the cache area of the primary recording unit 122 but not recorded in the secondary recording unit 124.

  When there is image data recorded in the cache area of the primary recording unit 122 but not recorded in the secondary recording unit 124 (Yes), the following is performed. That is, in the next step S43, the recording control unit 1 records the image data recorded in the cache area of the primary recording unit 122 but not recorded in the secondary recording unit 124 in the secondary recording unit 124. To do. Then, the recording control unit 1 performs primary processing so that the image data managed as recorded by the management information in the primary recording unit 122 and the image data actually recorded in the secondary recording unit 124 are synchronized. Management information in the recording unit 122 is updated.

  Further, in the secondary recording unit 124, the image data managed as recorded and indicated by the management information in the secondary recording unit 124 and the image data actually recorded in the secondary recording unit 124 are synchronized. Update management information.

  That is, the recording control unit 1 synchronizes at least the file name, head LBA, and data size of management information in the primary recording unit 122 with the file name, head LBA, and data size of management information in the secondary recording unit 124. Will be updated.

  On the other hand, if there is no image data recorded in the cache area of the primary recording unit 122 but not recorded in the secondary recording unit 124 (No), the recording end process is terminated.

  As described above, by performing the recording end process, it is possible to appropriately end the recording within the time in which the power supply circuit 125 can operate with a small amount of charge stored. That is, the image data managed as recorded by the management information of the primary recording unit 122, the image data managed as recorded by the management information of the secondary recording unit 124, and actually recorded in the secondary recording unit 124. It is possible to synchronize the contents of the image data being processed.

  In step S41, all processes performed by the imaging apparatus 100 when it is detected that the link-down state is detected are interrupted, and steps S42 and S43 are performed prior to all the processes. You may do it.

  In addition to recording new image data in the cache area of the primary recording unit 122, the image processing and object detection by the control unit 121 are stopped. And you may make it perform the process of step S42 and S43 prior to the image process and object detection process by the control part 121. FIG. In this way, the recording end process can be completed earlier.

  As described above, according to the recording control technique of the present embodiment, since the recording end process is performed when the link-down state is entered, the data is detected earlier than when the voltage is detected and the recording end process is performed. Recording can be terminated.

Second Embodiment
Hereinafter, with reference to the block diagram of FIG. 5 and the flowchart of FIG. 6, an imaging apparatus having a recording control apparatus according to the second embodiment of the present invention will be described. The difference from the first embodiment is that the power supply circuit 125 can receive power supply from the external power supply 140. The operation of the recording control unit 11 is also different. The external power supply 140 supplies power to the power supply circuit 125 through a power cable other than the network cable.

  Note that, similarly to the first embodiment, the power supply circuit 125 can also receive power supply from the network device 130.

  Hereinafter, the recording end process by the recording control unit 11 in the second embodiment will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 6 can be executed when the CPU performs a process based on a program read into the memory.

  Similar to the recording end process shown in FIG. 4, when the communication control unit 2 detects that the link between the communication unit 123 and the network device 130 has been disconnected (becomes a link-down state), the recording end process is started. This recording end process is performed when the link is disconnected when power is supplied to the power supply circuit 125 through a network cable.

  In the next step S <b> 61, the recording control unit 11 confirms whether or not the power supply circuit 125 is supplied with power from the external power supply 140.

  Specifically, the recording control unit 11 confirms power supply information indicating whether power is being received from the external power supply 140. The recording control unit 11 periodically measures a voltage or the like to confirm the power supply status and create power supply information. The power supply information is recorded in the primary recording unit 122 and is updated regularly (every few seconds). Since it takes time to check the power supply status by detecting the voltage, the power supply status can be confirmed more quickly by creating power supply information in advance.

  In step S62, the recording control unit 11 determines whether power is supplied from the external power supply 140 based on the confirmed result. When power is supplied from the external power source (Yes), the recording end process is terminated and the process returns to the recording process shown in FIG.

  On the other hand, when power is not supplied from the external power source 140 (No), the recording control unit 11 executes the recording end process in steps S41 to S43. The recording end process in steps S41 to S43 is the same as that in FIG.

  Even if the external power supply 140 has a function of receiving power supply, the power supply cable is disconnected and the power supply is not always received. According to the present embodiment, the status of power supply from the external power source 140 can be confirmed, and a recording end process can be executed as necessary. Further, by determining the power supply status using the power supply information created in advance, the recording end process can be executed quickly.

<Third Embodiment>
Next, an imaging apparatus having a recording control apparatus according to the third embodiment of the present invention will be described with reference to the block diagram of FIG. 5 and the flowchart of FIG. In the present embodiment, as in the second embodiment, the power supply circuit 125 can receive power supply from the external power supply 140. The operation of the recording control unit is also different. As in the second embodiment, the external power supply 140 supplies power to the power supply circuit 125 using a power cable other than the network cable.

  If the user deliberately enters the link down state, the action may be a preparation to end the use of the recording control device. Therefore, power supply from the external power supply 140 may be stopped in a short time (several seconds to several minutes). For this reason, the recording control apparatus 120 according to the present embodiment executes an interrupt process depending on the user setting status even when power supply from the external power supply 140 continues, and the image recorded in the cache area All data is recorded in the secondary recording unit 124. By doing so, even if the power supply from the external power supply 140 is suddenly stopped, the data can be appropriately protected.

  Hereinafter, the recording end process by the recording control unit 11 in the third embodiment will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 7 can be executed by the CPU performing a process based on the program read into the memory. Note that the recording end processing of this embodiment is also performed when the link is disconnected when power is supplied to the power supply circuit 125 via a network cable.

  Steps S61 and S62 and steps S41 to S43 are the same as those in FIG.

  The present embodiment is different in processing when it is determined in step S62 that power is supplied from an external power source (Yes).

  If it is determined in step S62 that power is supplied from the external power supply 140 (Yes), the user setting is confirmed in the next step S71. Specifically, the setting indicating what kind of recording is performed when the communication link between the communication unit 123 and the network device 130 is disconnected (becomes a link-down state) is confirmed.

  For example, when transmission of image data is interrupted due to a communication failure or the like, it cannot be recorded in an external recording device. For this reason, there is a need to record image data in the secondary recording unit 124. The recording control apparatus 120 according to the present embodiment starts recording image data to the secondary recording unit 124 when the communication link is disconnected and the image data recording process to the secondary recording unit 124 is not performed. It is assumed that the user can set whether or not to do so. For example, it can be set by performing an operation input through an operation input unit (not shown).

  In the next step S62, the recording control unit 11 determines whether or not the setting is to start recording of image data in the secondary recording unit 124 when the communication link is disconnected.

  If the setting is not to start recording of image data in the secondary recording unit 124 (No), the recording control unit 11 executes the recording end process of steps S41 to S43. The recording end process in steps S41 to S43 is the same as that in FIG.

  By performing the recording end process, the recording process is ended even if the recording process of the image data to the secondary recording unit 124 has already been performed when the communication link is disconnected. This is because it is considered that there is a possibility that the use of the recording control apparatus may be terminated when the communication link is disconnected because the user has not been set to start recording when the communication link is disconnected. That is, it is considered that the power supply from the external power supply 140 may be stopped in a short time (several seconds to several minutes).

  Note that the recording end process may be performed even when the communication link is disconnected when the recording process of the image data to the secondary recording unit 124 is not performed. This is because image data captured in the past may not be recorded in the secondary recording unit 124 yet. Depending on the execution status of processes other than the recording process, it may take about several minutes after recording in the cache area until recording in the secondary recording unit 124.

  On the other hand, if the setting is to start recording of image data in the secondary recording unit 124 (Yes), the recording end process is terminated and the process returns to the recording process shown in FIG.

  This is because the user is set to start recording when the communication link is disconnected, so the use of the recording control device is not terminated with the disconnection of the communication link this time, and in a short time (several minutes), This is because it is considered unlikely that power supply from the external power supply 140 is stopped.

  As described above, it is determined whether or not there is a possibility that the power supply from the external power supply 140 is stopped when the link-down state is entered. Specifically, the determination is made based on whether or not a setting for starting recording of image data in the secondary recording unit 124 when the communication link is disconnected is set by the user.

  By doing so, according to the present embodiment, it is possible to more accurately determine whether it is necessary to perform a recording end process.

(Other examples)
The present invention supplies a program that realizes one or more functions of each embodiment to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program It can also be realized by processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

  Further, the technique for recording image data has been described, but the present invention is not limited to image data, and can be applied to processing for recording various data.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the present invention. For example, you may combine each embodiment.
Further, “when power is supplied to the power supply circuit 125 via a network cable” includes a few seconds immediately after the power supply is stopped. In the above embodiment, the network cable is described as an example of the communication cable. However, other communication cables may be used as long as the power supply state can be identified based on the presence / absence of establishment of the communication link.

DESCRIPTION OF SYMBOLS 100 Image pick-up device 110 Image pick-up part 120 Recording control apparatus 121 Control part 1, 11 Recording control part 2 Communication control part 122 Primary recording part 124 Secondary recording part 123 Communication part 125 Power supply circuit 130 Network apparatus 140 External power supply

Claims (10)

A recording control device,
A communication means capable of communicating with the outside via a communication cable;
A power supply circuit capable of receiving power supply in at least one of the communication cable and a cable other than the communication cable;
Operating with power supply by the power supply circuit, and recording control means for recording data in the recording means,
It is possible to set in the recording control device whether to start the process of recording data in the recording means when the communication means and the external communication link are established from the established state. Yes,
The recording control unit is in a state in which a communication link between the communication unit and the outside is established, but is not established, and is not set to start processing for recording data in the recording unit. , Record end processing,
A recording control apparatus. The power supply circuit is capable of temporarily storing electric charges,
The recording control apparatus according to claim 1. The recording control unit is in a state where a communication link between the communication unit and the outside is established from a state where it is not established, and power is not supplied to the power supply circuit via the communication cable. The recording control apparatus according to claim 1, wherein the recording end process is performed. The recording control unit updates power supply information indicating whether the power supply circuit is supplied with power by the cable other than the communication cable at a predetermined interval,
The recording control apparatus according to claim 3, wherein the recording control unit determines whether the power supply circuit is supplied with power by the cable other than the communication cable with reference to the power supply information. The recording means records data recorded in a predetermined recording area of the primary recording means on the recording means;
The recording control apparatus according to claim 1, wherein the recording control apparatus is a recording apparatus. In the recording end process, new data is not recorded in the predetermined recording area of the primary recording means, and is recorded in the predetermined recording area of the primary recording means when the state is not established. 6. The recording control apparatus according to claim 5, wherein the recording control apparatus records data that is recorded in the recording unit but is not recorded in the recording unit. Image processing means for correcting the image data;
The recording control means executes the recording end processing prior to the processing in the image processing means;
The recording control apparatus according to claim 1, wherein the recording control apparatus is a recording apparatus. Comprising an object detection means for detecting an object included in the image based on the image data;
The recording control means executes the recording end processing prior to the processing in the object detection means;
The recording control apparatus according to claim 1, wherein the recording control apparatus is a recording apparatus. A recording control method executed by the recording control apparatus,
A step in which the power supply circuit is supplied with power by at least one of a communication cable and a cable other than the communication cable;
A recording control means for recording data in the recording means;
The recording control means includes a recording end process for performing a recording end process;
When the communication link with the outside is established from the established state, it is possible to set in the recording control device whether to start the process of recording data in the recording means,
In the recording end step, the recording control is performed when the communication link with the outside has been established but has not been established, and the recording means is not set to start processing for recording data. Means performs the recording end processing;
And a recording control method.   A program for causing a computer to execute the recording control step and the recording end step according to claim 9.

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