WO2015151624A1

WO2015151624A1 - Image recording and reproduction device, monitoring recorder and monitoring system

Info

Publication number: WO2015151624A1
Application number: PCT/JP2015/054515
Authority: WO
Inventors: 敬志上村; 丸山　清泰; 聡道籏
Original assignee: 三菱電機株式会社
Priority date: 2014-03-31
Filing date: 2015-02-19
Publication date: 2015-10-08
Also published as: JP6095850B2; JPWO2015151624A1

Abstract

Provided are an image recording and reproduction device, a monitoring recorder, and a monitoring system that can update a program saved in shared memory, even in a case where the memory capacity of shared memory accessible by a plurality of information processors is small. A monitoring recorder (1) acting as an image recording and reproduction device has a recording system CPU (21), a reproduction system CPU (31), a shared memory (10), and a program update controller (40) that uses an update program stored in an external memory device (5) to perform update processing of a reproduction system program saved in the shared memory (10). When the reproduction system program saved in the shared memory (10) is updated, the monitoring recorder (1) changes a reproduction system program executable by the reproduction system CPU (31) to an updated new reproduction system program by overwriting the memory region in the shared memory (10) for the reproduction system program to be updated with the update program stored in the external memory device (5).

Description

Video recording / reproducing apparatus, surveillance recorder, and surveillance system

The present invention relates to a video recording / reproducing apparatus, a monitoring recorder, and a monitoring system capable of updating a program stored in a shared memory accessible by a plurality of information processing units.

In general, a surveillance recorder which is a video recording / playback apparatus in a surveillance system includes a recording system for recording video data transmitted from a camera in a large-capacity memory and a playback system for playing back video data recorded in the large-capacity memory. . In particular, in a surveillance recorder, it is important to continue recording video data transmitted from a camera. Therefore, the monitoring recorder includes a recording system CPU (Central Processing Unit) that is a recording system processor and a playback system CPU that is a playback system as separate CPUs, so that it is not affected by the playback system. The recording system can continue to operate. In general, when a recording system CPU and a playback system CPU are provided as separate CPUs, a recording system nonvolatile memory storing a recording system program and a playback system nonvolatile memory storing a playback system program; Are provided as separate non-volatile memories. However, in this case, the circuit scale becomes large because two nonvolatile memories are provided. Also, in this case, it is necessary to rewrite the programs stored in the recording nonvolatile memory and the reproduction nonvolatile memory during the program updating process, which complicates the updating process.

Patent Document 1 describes a processing apparatus including a plurality of CPUs as a plurality of processors and a shared memory that is a nonvolatile memory shared by the plurality of CPUs. The first CPU (main processor) issues a reset release request for returning a part other than the second CPU of the processor board from the reset state to the processor board on which the second CPU (sub processor) is mounted. When a reset release request is issued, a ROM (Read Only Memory) information transfer unit provided in the processing device acquires program information from the ROM of the processor board, and the first CPU and the second CPU Write to shared memory accessible to both. The first CPU refers to the shared memory, acquires the program information of the second CPU, compares this with the program information stored in the ROM used by the first CPU, and compares the result. To the shared memory.

WO 2009/051135 (eg claims 1-7 and abstract)

In the processing apparatus described in Patent Document 1, when the obtained comparison result indicates a program mismatch, a processing for reading a spare program stored in advance in the shared memory from the shared memory is performed. However, in this processing apparatus, since the spare program is stored in the shared memory, there is a problem that the storage capacity required for the shared memory increases. In particular, in the case of a surveillance recorder, since a plurality of spare playback programs are held in the shared memory to prevent the execution of the recording program execution, the storage capacity required for the shared memory is extremely high. There is a problem of becoming larger.

Accordingly, the present invention has been made to solve the above-described problems of the prior art, and even when the storage capacity of the shared memory accessible by a plurality of information processing units is small, the shared memory is stored in the shared memory. An object of the present invention is to provide a video recording / reproducing apparatus, a monitoring recorder, and a monitoring system that can update a program that is being updated.

A video recording / playback apparatus according to an aspect of the present invention includes a recording system processing unit that records video data in an information storage unit, a playback system processing unit that reads and outputs video data recorded in the information storage unit, Both the recording system processing unit and the playback system processing unit are accessible, and at least the playback system program executable by the playback system processing unit is stored, and the update stored in the external storage device A program update control unit that performs an update process of the reproduction system program stored in the shared memory using a program for updating and update address data indicating a storage area of the update program in the shared memory The program update control unit is stored in the external storage device during update processing of the reproduction system program stored in the shared memory. The playback system program executable by the playback system processing unit is updated based on the update program by overwriting the update program in the storage area of the playback system program to be updated in the shared memory. It is characterized by changing to a new reproduction system program.

A monitoring recorder according to another aspect of the present invention includes a recording system processing unit that records video data input from a monitoring camera in an information storage unit, and a playback system that reads and outputs the video data recorded in the information storage unit A processing unit, a shared memory in which all of the recording system processing unit and the playback system processing unit are accessible and a playback system program executable by the playback system processing unit is stored, and an external storage device Program update control for performing update processing of the reproduction system program stored in the shared memory using the stored update program and update address data indicating the storage area of the update program in the shared memory And the program update control unit is configured to update the playback system program stored in the shared memory during the update process. Updating the playback system program executable by the playback system processing unit by overwriting the update program stored in the local storage device in the storage area of the playback system program to be updated in the shared memory The program is changed to a new reproduction system program updated based on the program for use.

A monitoring system according to another aspect of the present invention includes a monitoring camera, a recording system processing unit that records video data input from the monitoring camera in an information storage unit, and reads video data recorded in the information storage unit A reproduction system processing unit that outputs and a shared memory that is accessible to both the recording system processing unit and the reproduction system processing unit and stores at least a reproduction system program that can be executed by the reproduction system processing unit; Update processing of the reproduction system program stored in the shared memory using an update program stored in the external storage device and update address data indicating a storage area of the update program in the shared memory A program update control unit for performing the reproduction of the reproduction system program stored in the shared memory. The reproduction system processor can execute the reproduction by overwriting the update program stored in the external storage device in a storage area of the reproduction system program to be updated in the shared memory during a new process. The system program is changed to a new reproduction system program updated based on the update program.

According to the present invention, when updating a program stored in a shared memory accessible by a plurality of information processing units, an update target program stored in the shared memory is updated with the update program stored in the external storage device. In addition, since it is not necessary to store the update program in the shared memory in advance, the program can be updated even when the storage capacity of the shared memory is small.

It is a block diagram which shows roughly the structure of the monitoring recorder as a video recording / reproducing apparatus which concerns on Embodiment 1 of this invention. 4 is a diagram showing a storage format in an external storage device of the monitoring recorder according to Embodiment 1. FIG. FIG. 3 is a block diagram schematically showing a configuration of a program update control unit of the monitoring recorder according to the first embodiment. 4 is a flowchart showing operations of a program update control unit and a recording system CPU of the monitoring recorder according to the first embodiment. 4 is a flowchart showing operations of a program update control unit and a reproduction system CPU of the monitoring recorder according to the first embodiment. It is a block diagram which shows roughly the structure of the monitoring recorder as a video recording / reproducing apparatus which concerns on Embodiment 2 of this invention. It is a block diagram which shows roughly the structure of the program update control part of the monitoring recorder which concerns on Embodiment 2. FIG. It is a flowchart which shows the operation | movement of the program update control part of the monitoring recorder which concerns on Embodiment 2, and reproduction | regeneration system CPU.

<< 1 >> Embodiment 1
<< 1-1 >> Configuration of the first embodiment.
FIG. 1 is a block diagram schematically showing a configuration of a monitoring recorder 1 as a video recording / reproducing apparatus according to Embodiment 1 of the present invention. The monitoring recorder 1 is a device that can implement the program update method according to Embodiment 1 of the present invention. FIG. 1 shows a monitoring system 100 as an information processing system. The monitoring system 100 includes a monitoring recorder 1, a plurality of monitoring cameras 3a to 3c for capturing images, and a monitor as a video display device. 4 and an external storage device 5 for storing information such as programs.

The cameras 3a to 3c are connected to the monitoring recorder 1. The cameras 3a to 3c transmit video data obtained by photographing the monitoring target to the monitoring recorder 1. The cameras 3a to 3c may be installed at a location away from the monitoring recorder 1, for example. The monitoring recorder 1 receives the video data transmitted from the cameras 3a to 3c and records them. The monitor 4 is an output device controlled by the monitoring recorder 1, and displays a recorded video based on the video data recorded on the monitoring recorder 1 or a current video based on video data generated by photographing by the cameras 3a to 3c. To do. The number of cameras is not limited to three, and may be one, two, or four or more, for example. The connection between the cameras 3a to 3c and the monitoring recorder 1 may be a wired or wireless connection method as long as it is a communicable connection, or may be a connection via a network or other relay device.

As shown in FIG. 1, the monitoring recorder 1 includes a shared memory 10 that is a non-volatile memory, a recording system (recording system) 20 as a first system, and a reproduction system (reproduction system) 30 as a second system. And a program update control unit 40.

The shared memory 10 stores a reproduction system program as a second program executed by the reproduction system 30. The shared memory 10 may store a recording system program as a first program executed by the recording system CPU 21. The recording system program executed by the recording system CPU 21 is not necessarily stored in the shared memory 10, and may be stored in a storage device (for example, the information storage unit 23) such as a nonvolatile memory other than the shared memory 10. . The shared memory 10 is a memory in which various data can be read and written (read / write) by the recording system CPU 21 and the playback system CPU 31. The shared memory 10 is, for example, a NAND (Negative AND) type flash memory. In the shared memory 10, a program or other data is stored for each block, for example, and read out for each block.

The shared memory 10 has a plurality of ports and can be accessed from either the recording system 20 or the reproduction system 30. For example, the reproduction system 30 can read the data written in the shared memory 10 by the recording system 20. The shared memory 10 does not need to be configured by a single component, and for example, a storage element such as a flash memory and a plurality of ports may be configured by separate components.

The external storage device 5 stores a program for updating the playback system 30. The external storage device 5 is configured by, for example, a flash memory or an HDD (Hard Disk Drive: hard disk drive). The communication path between the external storage device 5 and the monitoring recorder 1 can be, for example, a path using USB (Universal Serial Bus) or Ethernet (registered trademark) (Ethernet (registered trademark)). Further, the external storage device 5 may be connected to the monitoring recorder 1 so as to be able to communicate via the Internet. FIG. 2 is a diagram illustrating an example of a storage format in the external storage device 5. As shown in FIG. 2, the external storage device 5 includes an update program 51 that is a program used for updating a reproduction system program (second program) on the shared memory 10 executed by the reproduction system CPU 31, and a reproduction system. The spare update program 52, which is another program used for updating the reproduction system program (second program) on the shared memory 10 executed by the CPU 31, and the external storage of the update program 51 and the spare update program 52 The update address data 53 indicating the address in the device 5 is stored. The spare update program 52 is the same type of software as the update program 51, and for example, at least one of the software version and the setting value is different. If the playback system CPU 31 cannot start the playback system program (second program) on the shared memory 10, this is often caused by an error in the software version or setting value. It is effective to prepare a plurality of combinations in the external storage device 5 in advance from the viewpoint of avoiding the inactivation of the playback CPU 31.

The cameras 3a to 3c are communicably connected to the recording system 20. The recording system 20 records video data transmitted from the cameras 3a to 3c in an information storage unit 23 as an auxiliary storage device. As shown in FIG. 1, the recording system 20 includes a recording system CPU (Central Processing Unit) 21 as a recording system processing unit (first information processing unit), a recording system work memory 22, and information And a storage unit 23.

The information storage unit 23 is a storage device that stores video data of videos taken by the cameras 3a to 3c. The information storage unit 23 is configured by, for example, a flash memory or an HDD (Hard Disk Drive). Note that the information storage unit 23 may be provided outside the recording system 20 or outside the monitoring recorder 1. The information storage unit 23 may be configured to be detachable from the monitoring recorder 1.

The recording system CPU 21 issues a program update request for the playback system 30 when the program for the playback system 30 is updated. The recording system CPU 21 reads the update program 51 of the reproduction system CPU 31 from the address of the external storage device 5 designated by the program update control unit 40. When the program update control unit 40 determines that the update program 51 is desired data, the recording system CPU 21 executes a process of writing the update program 51 into the shared memory 10 (overwriting process). When it is determined by the program update control unit 40 that the data read from the external storage device 5 is not the desired data, the recording system CPU 21 determines the playback system CPU 31 from the address of the external storage device 5 designated by the program update control unit 40. A process of reading the spare update program 52 is performed. The recording system CPU 21 writes the update program 51 of the playback system CPU 31 or the spare update program 52 of the playback system CPU 31 in the shared memory 10 and then issues a program restart request for the playback system 30.

The recording system CPU 21 receives an OS (Operating System) from the recording system work memory 22, the shared memory 10, or another storage device (for example, a storage device that is communicably connected such as the external storage device 5). Alternatively, a program (first program) for recording video data such as an application program is read and executed, and the recording operation of the recording system 20 is controlled. The recording system work memory 22 is a memory used as a work area of the recording system CPU 21 and is, for example, a RAM (Random Access Memory).

The reproduction system 30 is connected to the monitor 4, reproduces the video data recorded in the information storage unit 23 in the recording system 20, and displays the video based on the video data on the monitor 4. The playback system 30 can also directly display video based on video data captured by the cameras 3a to 3c on the monitor 4. The reproduction system 30 includes a reproduction system CPU 31 as a reproduction system processing unit (first information processing unit) and a reproduction system work memory 32.

The reproduction system CPU 31 executes the reproduction system program (second program) read from the shared memory 10. When receiving the program update request issued from the recording system CPU 21, the playback system CPU 31 stops access to the shared memory 10. The reproduction system CPU 31 may stop the access to the shared memory 10 and then execute a process that does not accompany the access to the shared memory 10, or terminate all the processes and request a restart from the recording system CPU 21. May be in a reset state or a power-off state until is issued. When a reactivation request for the reproduction system 30 is issued from the recording system CPU 21, the reproduction system CPU 31 reads the reproduction system program from the address where the reproduction system program of the shared memory 10 is stored, and the read reproduction system program is read out. The process described in is executed.

The reproduction system work memory 32 is a memory used as a work area of the reproduction system CPU 31 and is, for example, a RAM. The reproduction work memory 32 stores, for example, a reproduction program or other data read from the shared memory 10.

The program update control unit 40 manages the data stored in the external storage device 5, the activation status of the reproduction system CPU 31, and the like.

When the recording system CPU 21 issues a playback system program update request, the program update control unit 40 accesses the update address data 53 of the external storage device 5, refers to the update program 51 of the playback system CPU 31, and The address describing the update program 51 of the CPU 31 is output to the recording system CPU 21. The program update control unit 40 receives the information (for example, version information of the program) of the reproduction system CPU 31 read by the recording system CPU 21 and updates the update program 51 of the reproduction system CPU 31 read by the recording system CPU 21. It is determined whether the data is to be performed, and the result of this determination is output to the recording system CPU 21.

The program update control unit 40 determines whether or not the restart processing of the playback system CPU 31 has been normally completed after the recording system CPU 21 issues a restart request of the playback system CPU 31. When the program update control unit 40 confirms that the reproduction system CPU 31 has been normally activated, the reproduction system program update process is completed. The program update control unit 40 notifies the recording system CPU 21 of the state of the playback system CPU 31 when the playback system CPU 31 cannot be started normally, for example, when the processing of the playback system CPU 31 stops during the restart. The program update control unit 40 refers to the update address data 53 stored in the external storage device 5 when the reproduction system CPU 31 cannot be started normally, and determines the address of the spare update program 52 of the reproduction system CPU 31. Notify the recording system CPU 21.

Here, the recording system CPU 21 cannot normally execute the update process of the reproduction system program from the program update control unit 40, and the address of the spare update program 52 of the reproduction system CPU 31 stored in the external storage device 5 is notified. Then, the notified preliminary update program 52 of the reproduction system CPU 31 is read and overwritten on the address in which the reproduction system program to be updated of the reproduction system CPU 31 of the shared memory 10 is described. The recording system CPU 21 updates the playback system program stored in the shared memory 10 by overwriting the spare update program 52 of the playback system CPU 31 in the shared memory 10 and issues a restart request to the playback system CPU 31. Execute the process. Note that “overwrite” is, for example, an operation of deleting a playback system program to be updated in a block in which a playback system program to be updated by the playback system CPU 31 is stored and writing an update program 51 in the block. is there.

Here, as a factor that the reproduction system CPU 31 cannot normally restart by the update program 51 of the reproduction system CPU 31, for example, there is a data transmission bit error of the update program 51 of the reproduction system CPU 31. This bit error is caused by, for example, an unintended change in the path through which data stored in the external storage device 5 is transmitted to the monitoring recorder 1.

FIG. 3 is a block diagram schematically showing the configuration of the program update control unit 40 of the monitoring recorder 1 according to the first embodiment. As shown in FIG. 3, the program update control unit 40 includes a program address control unit 41, a program correspondence determination unit 42, and a CPU state monitoring unit 43.

For example, when the external storage device 5 is connected to the monitoring recorder 1, the program address control unit 41 is updated address data 53 in which an address for designating an area in which the update program of the reproduction system CPU 31 is stored is described. To access. The program address control unit 41 may specify the position of the update address data 53 when the monitoring recorder 1 is activated. The designation of the position of the update address data 53 may be executed, for example, by receiving data from the recording system CPU 21 when the external storage device 5 is connected to the monitoring recorder 1. After accessing the update address data 53 of the external storage device 5, the program address control unit 41 records the address of the area where the update program 51 of the reproduction CPU 31 described in the update address data 53 is stored in the recording system The CPU 21 is notified. The program address control unit 41 notifies the recording system CPU 21 of the address of the update program 51 of the reproduction system CPU 31, and then issues a notification request for the address of the spare update program 52 of the reproduction system CPU 31 from the recording system CPU 21. Then, the update address data 53 is accessed, and the address of the spare update program 52 of the reproduction system CPU 31 is notified to the recording system CPU 21.

The program correspondence determination unit 42 determines whether or not data information (for example, program version information) read by the recording CPU 21 from the external storage device 5 is appropriate as an update program. For example, the program correspondence determination unit 42 reads the correspondence data from the external storage device 5 and compares the described content with the data notified from the recording system CPU 21 to determine whether the data read by the recording system CPU 21 is appropriate. Judge whether. Here, the data notified from the recording system CPU 21 is, for example, information on a program running on the monitoring recorder 1 and hardware version or setting value. After determining whether the data read by the recording system CPU 21 is appropriate, the program correspondence determination unit 42 notifies the recording system CPU 21 of the determined result.

The CPU state monitoring unit 43 monitors the state of the reproduction system CPU 31 when the reproduction system CPU 31 executes the restart process. The CPU state monitoring unit 43 measures, for example, the elapsed time since the playback system CPU 31 started the restart process, and the playback system CPU 31 started normally even when a predetermined time or more has elapsed. When the signal notifying that is not received, it is determined that the reproduction system CPU 31 is not normally activated. The CPU status monitoring unit 43 may start processing for monitoring the status of the playback system CPU 31 when the playback system CPU 31 executes the restart process, or the monitoring recorder 1 is started and the CPU status monitoring unit is started. Processing may continue after 43 operations become possible.

<< 1-2 >> Operation of the first embodiment.
The operation of the monitoring recorder 1 as the video recording / reproducing apparatus according to the first embodiment, that is, the program update method according to the first embodiment will be described below. FIG. 4 is a flowchart showing operations of the recording system CPU 21 and the program update control unit 40 of the monitoring recorder 1 according to the first embodiment. FIG. 5 is a flowchart showing operations of the reproduction system CPU 31 and the program update control unit 40 of the monitoring recorder 1 according to the first embodiment.

4 and 5, the playback system program stored in the shared memory 10 executed by the playback system CPU 31 in the monitoring recorder 1 is replaced with the update program 51 stored in the external storage device 5 or a spare program. Program update processing for replacing with the update program 52 is started.

In FIG. 4, when the external storage device 5 is connected to the monitoring recorder 1 and update processing of the playback system program stored in the shared memory 10 is started, the program update control unit 40 is stored in the external storage device 5. The address of the update program 51 stored in the external storage device 5 is read with reference to the update address data 53 being stored. Since the external storage device 5 may store an update program other than the update program 51 of the reproduction system CPU 31, the program update control unit 40 sets the address where the designated update program is described. Then, the update address data 53 is referred to and read (step S1).

Next, the program update control unit 40 notifies the recording system CPU 21 of update address data indicating the address of the update program 51 read from the external storage device 5 (step S2). Next, the recording CPU 21 reads the update program 51 from the notified address of the external storage device 5 (step S3).

Next, the recording system CPU 21 sends the program information described in the update program 51 read from the external storage device 5 and the information of the program executed by the recording system CPU 21 to the program update control unit 40. (Step S4). Here, “program information” means not the program main body, but the program version or the program-related information such as setting values, and the program information size is much larger than the program main body size. Small.

Next, the program update control unit 40 refers to the information of the program described in the update program 51 read from the external storage device 5 and the information of the program executed by the recording system CPU 21, and It is determined whether or not the update program 51 read from the storage device 5 is an appropriate program in the update process (step S5).

If it is determined in step S5 that the update program 51 read from the external storage device 5 is not an appropriate program in the update process (NO in step S5), the recording CPU 21 or the program update control unit 40 5 is checked to determine whether or not the spare update program 52 of the reproduction system CPU 31 is stored (step S6). Whether or not the spare update program 52 is stored can be confirmed by referring to the number of addresses described in the update address data 53 stored in the external storage device 5 by the recording CPU 21, for example. This can be done by checking the number or presence of the spare update program 52. When the spare update program 52 of the reproduction system CPU 31 is stored in the external storage device 5 (YES in step S6), the program update control unit 40 stores the update address data 53 stored in the external storage device 5. Referring to FIG. 2, a process for reading the address of the spare update program 52 of the reproduction system CPU 31 is executed (step S1).

In step S6, when the spare update program 52 of the reproduction system CPU 31 is not stored in the external storage device 5, the program update control unit 40 ends the update process of the reproduction system program.

In step S5, when it is determined that the update program 51 of the reproduction system CPU 31 stored in the external storage device 5 is an appropriate program for the update process of the reproduction system program stored in the shared memory 10 (step S5). In S5, the recording system CPU 21 overwrites the update program 51 stored in the external storage device 5 in the area in the shared memory 10 where the reproduction system program to be updated is stored (step S7). After completion of the process of overwriting the reproduction system program in the shared memory 10 with the update program 51 read from the external storage device 5 and making the overwritten program a new updated reproduction system program, the recording system The CPU 21 issues a restart request for the updated reproduction system program to the reproduction system CPU 31 (step S8).

When the playback system CPU 31 completes the restart process by executing the updated playback system program, the program update control unit 40 determines that the update process of the playback system program in the shared memory 10 has been completed normally, The renewal program update processing is terminated (YES in step S9).

On the other hand, when the program update control unit 40 determines that it is not normally executed in any of the restart process of the reproduction system CPU 31 and the process described in the update program 51 of the reproduction system CPU 31 (step S9). In step S6), it is confirmed whether or not a spare update program used for update processing of the reproduction system program is stored in the external storage device 5 (step S6). When the spare update program 52 of the reproduction system CPU 31 is stored in the external storage device 5 (YES in step S6), the program update control unit 40 stores the update address data 53 stored in the external storage device 5. Referring to FIG. 2, a process for reading the address of the spare update program 52 of the reproduction system CPU 31 is executed (step S1).

In FIG. 5, when update processing of the playback system program in the monitoring recorder 1 is started, the playback system CPU 31 stops processing described in the playback system program to be updated, which is stored in the shared memory 10 (step S11). It should be noted that the process that the reproduction system CPU 31 stops may be only related to the reproduction system program to be updated that is updated in the reproduction system program update process, or may be all processes executed by the reproduction system CPU 31. .

When the reproduction system CPU 31 stops the process described in the reproduction system program to be updated, which is stored in the shared memory 10, after the update process by overwriting shown in step S7 in FIG. Is issued, and the playback CPU 31 executes a restart process (step S12). The reproduction system CPU 31 executes a restart process, and reads the updated reproduction system program in the shared memory 10 in the update process by overwriting shown in step S7 of FIG. 4 (step S13). Since the position of the update address in the shared memory 10 of the playback system program after the update is not changed from the position of the playback system program before the update, the update process of the playback system program is performed in the playback program on the shared memory 10. Need only be overwritten by the

update program

51 or 52, and there is no need to change other settings.

The playback system CPU 31 executes the process described in the updated playback system program stored in the shared memory 10 and, if the process is normally executed, indicates that the restart process has been normally completed. The CPU 21 is notified (YES in step S14), and the reproduction system program update processing of the reproduction system CPU 31 is terminated.

The reproduction system CPU 31 executes the process described in the updated reproduction system program stored in the shared memory 10, and when the process is not normally executed (step S15), the reproduction system CPU 31 performs a backup according to step S9 in FIG. The presence or absence of the update program 52 is checked (step S15). In step S15, if there is a spare update program 52 in the external storage device 5 (YES in step S15), a restart request issued by the recording CPU 21 after the spare update program 52 is overwritten in the shared memory 10 Accordingly, the reproduction system CPU 31 executes restart processing of the updated reproduction system program (step S12).

In step S15, when there is no spare update program 52 in the external storage device 5 (NO in step S15), the update process is terminated without performing the update process of the reproduction system program.

The above operation is an example, and may be changed as appropriate. For example, the spare update program 52 stored in the external storage device 5 is only the spare update program 52 of the reproduction system CPU 31. Although the case has been described, a plurality of spare update programs may be provided. In this case, the data indicating the update addresses of the plurality of spare update programs needs to be described in the update address data 53 stored in the external storage device 5.

<< 1-3 >> Effects of the first embodiment.
As described above, according to the monitoring recorder 1 and the program update method according to the first embodiment, the following effects (1) to (8) can be obtained.
(1) When updating the playback system program executed by the playback system CPU 31, the recording system CPU 21 stores the update program 51 stored in the accessible external storage device 5 in the shared memory 10. Overwrite the existing playback system program to be updated, and rewrite the previous playback system program with the updated playback system program. This eliminates the need to reconnect the external storage device 5 once connected so as to be communicable to the recording system CPU 21 so that it can be accessed by the reproduction system CPU 31, and before the update stored in the shared memory 10. The playback system program can be changed to an updated playback system program.

(2) When the recording system CPU 21 updates the playback system program stored in the shared memory 10, the recording system CPU 21 updates the update program stored in the external storage device 5 to the update target stored in the shared memory 10. Overwrite the playback program. The program update control unit 40 notifies the recording system CPU 21 of the storage location of the spare update program stored in the external storage device 5 when the playback system CPU 31 cannot be normally started with the updated playback system program. As a result, the spare update program is overwritten on the reproduction system program to be updated stored in the shared memory 10. As described above, in the first embodiment, it is not necessary to store a plurality of programs in the shared memory 10, and it is sufficient to store one program. Therefore, the storage capacity required for the shared memory 10 is sufficient. Can be reduced.
In Patent Document 1, since a spare update program is stored on the shared memory, the storage capacity required for the shared memory is greatly increased from the capacity occupied by the program executed by the processor. was there. In the first embodiment, since the update processing of the reproduction system program in the shared memory 10 can be executed while the spare update program 52 is stored in the external storage device 5, the problem described in Patent Document 1 does not occur.

(3) When the recording system CPU 21 updates the reproduction system program stored in the shared memory 10, the recording system CPU 21 updates the update program 51 stored in the external storage device 5 with the update target stored in the shared memory 10. Overwrite the playback program. The program update control unit 40 is configured to update the spare update program 52 stored in the external storage device 5 when the playback system CPU 31 has not successfully started up with the updated playback system program stored in the shared memory 10. By notifying the recording system CPU 21 of the storage position, the spare update program 52 is overwritten on the updated reproduction system program stored in the shared memory 10, and the spare update program 52 is stored in the shared memory 10. It becomes a playback system program after the update. Thus, in the first embodiment, since the address of the area where the updated reproduction system program is stored is the same as the address before the update, the reproduction system CPU 31 accesses the shared memory 10 and is updated. When the reproduction system program is read, the same address can be used as the address indicating the area where the reproduction system program is stored, so that the processing load on the reproduction system CPU 31 is reduced.

(4) The program update control unit 40 updates the program 51 for updating obtained by referring to the update address data 53 for the update program 51 and the spare update program 52 in the external storage device 5 or the spare update program. The address 52 is notified to the recording system CPU 21. As a result, it is not necessary to previously store the update address data of the update program and the spare update program in the shared memory 10, and the update address data is notified by a user input operation (for example, manually). It is not necessary to update the reproduction system program stored in the shared memory 10 after the external storage device 5 is connected.

(5) The program update control unit 40 determines the necessity of restarting the reproduction system CPU 31 by monitoring the information of the updated reproduction system program stored in the shared memory 10 and the state of the reproduction system CPU 31. be able to. Therefore, the program update control unit 40 can measure the elapsed time from the restart start request at the timing when the recording system CPU 21 issues a restart request to the playback system CPU 31, and the playback system CPU 31 restarts. The elapsed time from the start of processing can be accurately or easily measured.

(6) In the monitoring system 100, it is important that the monitoring recorder 1 continues to store video data transmitted from the cameras 3a to 3c. Since the monitoring recorder 1 according to the first embodiment includes the recording system CPU 21 and the reproduction system CPU 31 as separate CPUs, the recording system 20 can operate without being affected by the reproduction system 30, Video data can be continuously recorded.

(7) In the first embodiment, when the reproduction system program stored in the shared memory 10 is updated, the recording system CPU 21 issues a process for accessing the shared memory 10 and a restart request to the reproduction system CPU 31. However, no other processing is required. For this reason, even if a situation occurs in which the playback system CPU 31 does not normally operate during or after the update process of the playback system program, the recording operation by the recording system CPU 21 is not interrupted due to this. .

(8) The program update control unit 40 updates the recording program CPU 21 before updating the playback program stored in the shared memory 10 with the update program 51 stored in the external storage device 5. It can be determined whether the program 51 is appropriate. For this reason, in the first embodiment, since it is difficult for the reproduction system CPU 31 to perform the reproduction process of the reproduction system program after the update, the processing load on the reproduction system CPU 31 is reduced without adding dedicated hardware. can do.

<< 2 >> Embodiment 2
<< 2-1 >> Configuration of the second embodiment.
FIG. 6 is a block diagram schematically showing the configuration of the monitoring recorder 2 as a video recording / reproducing apparatus according to Embodiment 2 of the present invention. The monitoring recorder 2 is a device that can implement the program update method according to the second embodiment of the present invention. 6, components that are the same as or correspond to the components shown in FIG. 1 (Embodiment 1) are given the same reference numerals as those shown in FIG. In the monitoring recorder 2 according to the second embodiment, the playback system CPU 31 as the second information processing unit executes the playback system program as the second program stored in the shared memory 10 in accordance with the instruction of the program update control unit 40a. Before starting the program update process, the playback system work memory 32 is temporarily stored, and when the playback system program update process cannot be normally completed, the playback system program temporarily stored in the playback system work memory 32 is shared. The monitoring recorder 1 according to the first embodiment is different from the monitoring recorder 1 according to the first embodiment in that the process of writing to the original storage area of the memory 10, that is, the process of returning to the original storage area is performed.

FIG. 7 is a block diagram schematically showing the configuration of the program update control unit of the monitoring recorder according to the second embodiment. 7, components that are the same as or correspond to the components shown in FIG. 3 (Embodiment 1) are assigned the same reference numerals as those shown in FIG. The program update control unit 40a of the monitoring recorder 2 according to the second embodiment monitors the state of the reproduction system CPU 31, and also reproduces the reproduction system program as the second program stored in the shared memory 10 in the reproduction system CPU 31. Before starting the program update process, the playback system work memory 32 is temporarily stored, and when the playback system program update process cannot be completed normally, the playback system program temporarily stored in the playback system work memory 32 is shared memory. 10 is different from the program update control unit 40 of the monitoring recorder 1 according to the first embodiment in that the CPU has a CPU state monitoring control unit 44 that performs processing to write back to the original storage area, that is, to perform processing to return to the original storage area .

<< 2-2 >> Operation of the second embodiment.
In the monitoring recorder 2 as the video recording / reproducing apparatus according to the second embodiment, the reproduction system CPU 31 executes the reproduction system program read from the shared memory 10. When a program update request is issued from the recording system CPU 21, the playback system CPU 31 temporarily stores the playback system program read from the shared memory 10 in the playback system work memory 32 and stops access to the shared memory 10. The playback system CPU 31 executes processing described in the playback system program temporarily stored in the playback system work memory 32. When a reactivation request for the reproduction system 30 is issued from the recording system CPU 21, the reproduction system CPU 31 reads the program from the address where the reproduction system program of the shared memory 10 is stored, and the process described in the read program Execute. When the update system program is not described in the address where the playback system program of the shared memory 10 is stored or when the recording system CPU 21 issues a request to cancel the update process of the playback system program, the playback system CPU 31 The reproduction system program temporarily stored in the reproduction system work memory 32 is executed. The cancellation request is generated, for example, when an input from the operation input unit by the user of the monitoring recorder 1 is generated, or when a failure in the update process is found by a program other than the recording system program and the playback system program and so on. Note that the reproduction system program temporarily stored in the reproduction system work memory 32 may be written to the address where the reproduction system program of the shared memory 10 is described.

FIG. 8 is a flowchart showing the operation of the reproduction system CPU 31 of the program update control unit 40 of the monitoring recorder 2 according to the second embodiment. With reference to FIG. 8, the operation of the monitoring recorder 2 as the video recording / reproducing apparatus according to the second embodiment will be described. The operation of the recording system CPU 21 is the same as that in the first embodiment.

In FIG. 8, when the update process of the playback system program is started, the playback system CPU 31 reads the playback system program to be updated stored in the shared memory 10 into the playback system work memory 32 provided in the playback system 30. Temporary storage. After that, the reproduction system CPU 31 refers to the update target reproduction system program temporarily stored in the reproduction system work memory 32, and continues to execute the process described in the update target reproduction system program (step S11a).

The processing in steps S12 to S16 in FIG. 8 is the same as the processing in steps S12 to S16 in FIG. However, in the second embodiment, until the recording system CPU 21 issues a restart request from step S11a to step S12, the playback system CPU 31 performs the same process as before the update process of the playback system program is started. Can continue.

In step S15 in FIG. 8, when the spare update program 52 is not stored in the external storage device 5 (NO in step S15), the reproduction system CPU 31 stores the program temporarily stored in the reproduction system work memory 32 in step S11a. After writing to the area of the shared memory 10 stored at the start of the update process of the playback system program, the process described in the program written to the shared memory 10 is executed, and the update is performed by the update process of the playback system program The absence is output to the monitor 4.

<< 2-3 >> Effects of the second embodiment.
As described above, according to the second embodiment, the following effects (9) to (10) can be obtained in addition to the effects (1) to (8) described in the first embodiment. .
(9) When the reproduction system program update process is started, the reproduction system CPU 31 reads the reproduction system program stored in the shared memory 10 to be updated, and the reproduction system work memory provided in the reproduction system 30. The program temporarily stored (copied) in the playback work memory 32 without accessing the update-target playback program stored in the shared memory 10 after being temporarily stored in the memory 32 (that is, after copying) , The process described in the playback system program to be updated is executed. In the second embodiment, the recording system CPU 21 rewrites the update target reproduction system program stored in the shared memory 10 with the update program 51 stored in the external storage device 5 in the reproduction system program update process. Even (that is, overwritten), the reproduction system CPU 31 can execute the processing described in the reproduction system program to be updated. For example, the time during which the user cannot view the video displayed on the monitor 4 by the update process of the playback system program can be shortened.

(10) When the reproduction system program 31 in the shared memory 10 is updated, the reproduction system CPU 31 restarts the updated reproduction system program in response to a restart request, and the program update control unit 40 has executed the update process normally. If it is determined that there is no spare update program in the external storage device 5, the reproduction system program temporarily stored in the reproduction system work memory 32 (that is, copied) is stored in the shared memory 10. (That is, the reproduction system program is returned to the original position in the shared memory 10), and the reproduction system program is restarted. As a result, even if the playback system CPU 31 cannot normally execute the playback system program updated using the update program 51 stored in the external storage device 5, it is temporarily stored in the playback system work memory 32. The original playback system program can be returned to the shared memory 10 to execute playback processing. In particular, since it is not desirable for the monitoring recorder 2 to be in a state where video data cannot be output to the monitor 4, it is necessary that the program processing of the reproduction system 30 be executable. In the second embodiment, a playback system program that can be processed by the playback system CPU 31 by temporarily storing the playback system program that was started before the start of the update processing of the playback system program in the playback system work memory 32. Can be held.
In the second embodiment, if a RAM is used as the reproduction work memory 32, the configuration of the ROM connected to the processor in Patent Document 1 is unnecessary, and the configuration of the monitoring recorder 2 is simplified. Can do.

<< 3 >> Modified example.
In the first and second embodiments, the function of the program update control unit 40 may be realized only by hardware resources such as an electronic circuit, or may be realized by cooperation of hardware resources and software resources. It may be realized only by software resources. When realized by the cooperation of hardware resources and software resources, the function of the program update control unit 40 is realized by, for example, a computer program being executed by a computer. More specifically, the function of the program update control unit 40 is realized by a computer program stored in a storage medium such as a ROM being called by the main storage device and executed by the CPU. The computer program may be provided by being stored in a computer-readable storage medium such as an optical disc, or may be provided via a communication line such as the Internet.

Further, the present invention is not limited to the above example, and can be modified in various ways within a range not departing from the gist of the present invention.

In addition, a device to which the present invention is applicable is not limited to a monitoring recorder. In the present invention, the first information processing unit, the second information processing unit that executes the second program, and any of the first information processing unit and the second information processing unit are accessible. If it is a device having a shared memory in which two programs are stored, such as a video recording / playback device, a TV having a recording / playback function, a personal computer, a portable information terminal such as a smartphone or a tablet terminal, and a game machine It can be applied to various kinds of devices.

1, 2, monitoring recorder (video recording / playback device), 3a, 3b, 3c camera, 4 monitor (video display device), 5 external storage device, 10 shared memory (non-volatile memory), 20 recording system, 21 recording system CPU ( Recording system processing unit, first information processing unit), 22 recording system work memory, 23 information storage unit, 30 playback system, 31 playback system CPU (playback system processing unit, second information processing unit), 32 playback system work Memory, 40, 40a Program update control unit, 41 Program address control unit, 42 Program correspondence determination unit, 43 CPU status monitoring unit, 44 CPU status monitoring control unit, 51 Update program, 52 Preliminary update program, 53 Update Address data, 100, 200 monitoring system (information processing The stem).

Claims

A recording processing unit for recording video data in the information storage unit;
A reproduction processing unit that reads out and outputs video data recorded in the information storage unit;
A shared memory in which both the recording system processing unit and the playback system processing unit are accessible, and at least a playback system program executable by the playback system processing unit is stored;
Using the update program stored in the external storage device and the update address data indicating the storage area of the update program in the shared memory, update processing of the reproduction system program stored in the shared memory is performed. And a program update control unit for performing
The program update control unit converts the update program stored in the external storage device into the update target program to be updated in the shared memory during the update process of the playback program stored in the shared memory. A video recording / reproducing apparatus, wherein the reproduction system program executable by the reproduction system processing unit is changed to a new updated reproduction system program based on the update program by overwriting the storage area.
The information storage unit;
The recording system processing unit records the video data input from the outside in the information storage unit,
The video recording / playback apparatus according to claim 1, wherein the playback system processing unit reads and outputs the video data recorded in the information storage unit.
A recording processing unit for recording video data input from the surveillance camera in the information storage unit;
A reproduction processing unit that reads out and outputs video data recorded in the information storage unit;
A shared memory in which both the recording system processing unit and the playback system processing unit are accessible, and at least a playback system program executable by the playback system processing unit is stored;
Using the update program stored in the external storage device and the update address data indicating the storage area of the update program in the shared memory, update processing of the reproduction system program stored in the shared memory is performed. And a program update control unit for performing
The program update control unit converts the update program stored in the external storage device into the update target program to be updated in the shared memory during the update process of the playback program stored in the shared memory. Overwriting the storage area, the playback system program executable by the playback system processing unit is changed to a new playback system program updated based on the update program.
A surveillance camera,
A recording system processing unit that records video data input from the monitoring camera in an information storage unit;
A reproduction processing unit that reads out and outputs video data recorded in the information storage unit;
A shared memory in which both the recording system processing unit and the playback system processing unit are accessible, and at least a playback system program executable by the playback system processing unit is stored;
Using the update program stored in the external storage device and the update address data indicating the storage area of the update program in the shared memory, update processing of the reproduction system program stored in the shared memory is performed. And a program update control unit for performing
The program update control unit converts the update program stored in the external storage device into the update target program to be updated in the shared memory during the update process of the playback program stored in the shared memory. Overwriting the storage area, the reproduction system program executable by the reproduction system processing unit is changed to an updated new reproduction system program based on the update program.