WO2023243382A1 - 映像記録システム - Google Patents

映像記録システム Download PDF

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Publication number
WO2023243382A1
WO2023243382A1 PCT/JP2023/019906 JP2023019906W WO2023243382A1 WO 2023243382 A1 WO2023243382 A1 WO 2023243382A1 JP 2023019906 W JP2023019906 W JP 2023019906W WO 2023243382 A1 WO2023243382 A1 WO 2023243382A1
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WIPO (PCT)
Prior art keywords
video
information processing
processing device
storage
port
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PCT/JP2023/019906
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English (en)
French (fr)
Japanese (ja)
Inventor
英明 山下
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パナソニックＩｐマネジメント株式会社
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Priority to JP2024528664A priority Critical patent/JP7713662B2/ja
Publication of WO2023243382A1 publication Critical patent/WO2023243382A1/ja

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements

Definitions

  • the present disclosure relates to a video recording system that records video from a video output device in storage.
  • a system is known that inputs video output from a video output device such as a camera and records the video in external storage. Videos recorded in external storage are used, for example, for future playback or video editing.
  • a system for recording video onto an external storage has a video recording device that is in charge of recording video input from a video output device onto the storage.
  • This video recording device is assigned a storage port and records video on the storage via this port.
  • the video recording device may become unable to record video on the storage due to an abnormality in the port.
  • recording of the video input from the video output device to the storage may be interrupted, making it impossible to record video for future playback or video editing.
  • the purpose of the present disclosure is to use another port to record the video without interruption when an abnormality occurs in the storage port when video output from a video output device is being recorded in the storage. do.
  • the video recording system of the present disclosure includes a video output device, a storage, a first information processing device, and a second information processing device.
  • the video output device outputs video.
  • the storage has multiple access ports.
  • the first information processing device is connected to the video output device, is assigned a first port among the plurality of access ports of the storage for transmitting and receiving data, and transmits the recording target video input from the video output device to the first port. Record to storage via.
  • the second information processing device is assigned a second port among the plurality of access ports of the storage for transmitting and receiving data, and executes predetermined processing regarding video.
  • the first information processing device when an abnormality occurs in the first port of the storage, the first information processing device sends area information indicating the recording area of the storage where the recording target video is to be recorded to the second information processing device. Send.
  • the second information processing device records the video to be recorded in the recording area of the storage indicated by the area information received from the first information processing device via the second port.
  • the video recording system of the present disclosure when an abnormality occurs in the first port assigned to the first information processing device, another port (second port) of the storage is assigned in place of the first information processing device.
  • the second information processing device records the video to be recorded in the storage. This allows the video to be recorded to be recorded without interruption.
  • FIG. 1 is a diagram showing the configuration of a video recording system.
  • FIG. 2 is a diagram showing the configuration of the first information processing device.
  • FIG. 3 is a diagram showing the configuration of the second information processing device.
  • FIG. 4 is a diagram showing the configuration of the storage control device.
  • FIG. 5 is a diagram showing the configuration of the storage.
  • FIG. 6 is a diagram showing signal transmission and reception in the initialization operation of the video recording system.
  • FIG. 7 is a diagram showing signal transmission and reception during video readout and recording operations.
  • FIG. 8 is a flowchart showing the operation of the first information processing device when an abnormality occurs in the recording operation.
  • FIG. 9 is a flowchart showing the operation of the second information processing apparatus when an abnormality occurs in the recording operation.
  • FIG. 1 is a diagram showing the configuration of a video recording system.
  • FIG. 2 is a diagram showing the configuration of the first information processing device.
  • FIG. 3 is a diagram showing the configuration of the second information processing device.
  • FIG. 10 is a diagram showing the transmission and reception of signals during a video recording operation when an abnormality occurs.
  • FIG. 11 is a flowchart showing the operation of the first information processing device when compressed video is the video to be recorded.
  • FIG. 12 is a flowchart showing the operation of the second information processing device 4 when compressed video is the video to be recorded.
  • FIG. 13 is a diagram showing the transmission and reception of signals in a recording operation when compressed video is the video to be recorded.
  • FIG. 14 is a diagram showing an example of transfer information.
  • FIG. 15 is a flowchart showing the operation of the first information processing device in recording the recording target video using transfer information.
  • FIG. 16 is a flowchart showing the operation of the second information processing device in recording the recording target video using transfer information.
  • FIG. 17 is a diagram illustrating transmission and reception of signals during recording of a recording target video using transfer information TI.
  • FIG. 18 is a diagram illustrating an example of transfer information after conversion.
  • FIG. 19 is a diagram showing the
  • video means data including video data and audio data, data including only video data, and data including still image data.
  • the video recording system 100 of the present disclosure will be described below with reference to the drawings.
  • the video recording system 100 is a system that can generate new video by appropriately editing video by "cutting and pasting.” Specifically, the video recording system 100 generates a new video by inserting, for example, a specific part of the video that was previously acquired and recorded in storage into the video that was acquired from the video output device 1, and Provided to.
  • FIG. 1 is a diagram showing the configuration of a video recording system 100.
  • the video recording system 100 includes a video output device 1, a storage 2, a first information processing device 3, a second information processing device 4, and a storage control device 5.
  • the video output device 1 is a device that outputs video to the outside.
  • the video output device 1 is, for example, a video photographing device that includes a camera that photographs a predetermined video, a microphone that acquires audio of the predetermined video, and the like.
  • the video output device 1 may be a media server that records a large number of videos.
  • the video output by the video output device 1 is, for example, a high-quality video such as an uncompressed 4K video.
  • the video recording system 100 may include a plurality of video output devices 1.
  • the storage 2 is a storage device that records video.
  • the storage 2 is, for example, a solid state drive (SSD) that uses semiconductor nonvolatile memory as a data recording area.
  • the storage 2 may be a hard disk drive (HDD).
  • the storage 2 has a plurality of access ports 21 for connection with the outside.
  • the storage 2 is connected to the storage control device 5 by connecting the plurality of access ports 21 to the storage control device 5 .
  • the storage 2 is capable of recording/reading data via each of the plurality of access ports 21. As a result, even if an abnormality occurs in one of the multiple access ports 21 and data cannot be recorded/read, the storage 2 can still record/read data via the other access ports 21. . As a result, the reliability of the storage 2 is improved.
  • the storage 2 has two access ports 21a and 21b.
  • the number of access ports 21 is not limited to two.
  • the number of access ports 21 can be any number greater than or equal to 2, if necessary.
  • the storage 2 is located outside the storage control device 5.
  • the present invention is not limited to this, and the storage 2 may be placed within the storage control device 5.
  • the first information processing device 3 is connected to the video output device 1 and can input video from the video output device 1. Further, the first information processing device 3 is connected to a storage control device 5. The storage control device 5 allocates one of the plurality of access ports 21 of the storage 2 to the first information processing device 3 for data transmission and reception. That is, the first information processing device 3 is capable of transmitting and receiving data to and from the storage 2 via any one of the plurality of access ports 21.
  • the first information processing device 3 records the video input from the video output device 1 into the storage 2 via the assigned access port 21.
  • the video input from the video output device 1 and recorded in the storage 2 will be referred to as "video to be recorded.”
  • the video recorded in the storage 2 can be used, for example, for future video editing.
  • the first information processing device 3 edits the video input from the video output device 1 and sends the edited video to an external device 6 (for example, a display).
  • an external device 6 for example, a display
  • the first information processing device 3 can generate a new video by inserting a specific portion of a past video stored in the storage 2 into the video input from the video output device 1, for example.
  • the first information processing device 3 is connected to the second information processing device 4, and is capable of transmitting and receiving data to and from the second information processing device 4. For example, when performing editing to insert a specific part of a past video into a video input from the video output device 1, the first information processing device 3 determines where in the past video the specific part exists. A command to analyze is transmitted to the second information processing device 4. As a response to this command, the first information processing device 3 receives the analysis result (location of a specific portion used for video editing) by the second information processing device 4.
  • the first information processing device 3 when the first information processing device 3 is unable to record the recording target video onto the storage 2 and the second information processing device 4 instead records the recording target video onto the storage 2, the first information processing device 3 The information processing device 4 transmits information necessary for recording the video to be recorded in the storage 2.
  • the second information processing device 4 is connected to the storage control device 5.
  • the storage control device 5 allocates an access port 21 different from that of the first information processing device 3 to the second information processing device 4 for transmitting and receiving data. That is, the second information processing device 4 is enabled by the storage control device 5 to transmit and receive data to and from the storage 2 via an access port 21 different from that of the first information processing device 3.
  • the second information processing device 4 reads a desired video from the storage 2 via the assigned access port 21 and executes predetermined processing regarding this video. Specifically, for example, based on a command from the first information processing device 3, the second information processing device 4 analyzes the past video recorded in the storage 2, and the first information processing device 3 To identify where in a past video a specific part used for video editing exists. The second information processing device 4 executes the above video analysis using AI, for example. The second information processing device 4 transmits the video analysis result to the first information processing device 3.
  • Video to be recorded can also be recorded in the storage 2 via the access port 21 assigned to the second information processing device 4.
  • the second information processing device 4 is connected to the video output device 1 and can input video from the video output device 1.
  • the second information processing device 4 can input the same video as the video input to the first information processing device 3 from the video output device 1. Therefore, when recording a video to be recorded in the storage 2 instead of the first information processing device 3, the second information processing device 4 records the same video as the video to be recorded that is input to the first information processing device 3. This same video can be input from the video output device 1 and recorded in the storage 2 as a video to be recorded. Thereby, the second information processing device 4 can record the recording target video (the same video) in the storage 2 without receiving the recording target video from the first information processing device 3.
  • the storage control device 5 controls transmission and reception of images and commands between the first information processing device 3 and the second information processing device 4 and the storage 2.
  • the storage control device 5 allocates one of the plurality of access ports 21 of the storage 2 to the first information processing device 3 for transmitting and receiving data, and assigns the other one to the second information processing device for transmitting and receiving data. Assign to device 4.
  • FIG. 2 is a diagram showing the configuration of the first information processing device 3.
  • the first information processing device 3 includes a CPU 31 , a RAM 33 , a storage device 35 , an interface 37 , and a network interface 39 .
  • the CPU 31 executes various processes in the first information processing device 3. Specifically, the CPU 31 executes information processing related to video editing, processing related to recording the video input from the video output device 1 into the storage 2, etc. as information processing in the first information processing device 3.
  • the CPU 31 executes various processes by executing instructions shown in programs stored in the storage device 35. Note that a part of the processing may be realized by hardware installed in the CPU 31.
  • the CPU 31 generates commands for executing various processes.
  • the RAM 33 temporarily stores data and the like.
  • the commands generated by the CPU 31 are temporarily stored in the RAM 33 (queueing). Further, data transmitted and received between the video output device 1, the storage 2, the second information processing device 4, and the storage control device 5 is also temporarily stored in the RAM 33.
  • the storage device 35 is composed of a ROM, a hard disk (HDD), a solid state drive (SSD), and the like.
  • the storage device 35 stores programs executed by the CPU 31, settings related to processing of the first information processing device 3, parameters used for the processing, and the like.
  • the interface 37 connects the first information processing device 3 and other devices. As shown in FIG. 2, the video output device 1 and the external device 6 are connected to the interface 37.
  • the interface 37 is an interface for connecting video-related equipment, such as an interface based on the Serial Digital Interface (SDI) standard, for example.
  • SDI Serial Digital Interface
  • the network interface 39 connects the first information processing device 3 and other devices via a network such as a WAN or LAN. As shown in FIG. 2, the second information processing device 4 and the storage control device 5 are connected to the network interface 39.
  • the network interface 39 allows data to be directly transmitted and received between the RAM 33 of the first information processing device 3 and other device RAMs by remote direct memory access (RDMA). This allows high-speed data transmission and reception between the first information processing device 3 and other devices.
  • the network interface 39 is, for example, a Gigabit Ethernet (registered trademark) interface.
  • the video output device 1 and the external device 6 may be connected to the network interface 39 instead of the interface 37.
  • transmission according to the ST2110 standard of the SMPTE standardization body can be used.
  • FIG. 3 is a diagram showing the configuration of the second information processing device 4.
  • the second information processing device 4 includes a CPU 41 , a RAM 43 , a storage device 45 , an interface 47 , and a network interface 49 .
  • the CPU 41 executes various processes in the second information processing device 4. Specifically, the CPU 41 executes processing related to video analysis using AI and recording the video in the storage 2 instead of the first information processing device 3 as information processing in the second information processing device 4 .
  • the CPU 41 executes various processes in the second information processing device 4 by executing instructions shown in programs stored in the storage device 45. The CPU 41 generates a command for executing the above processing.
  • a part of the processing in the second information processing device 4 may be realized by hardware installed in the CPU 41.
  • AI used for video analysis may be realized by a program stored in the storage device 45 or by hardware installed in the CPU 41.
  • the RAM 43 temporarily stores data and the like.
  • the commands generated by the CPU 41 are temporarily stored in the RAM 43. Further, data transmitted and received between the video output device 1, the storage 2, the first information processing device 3, and the storage control device 5 is also temporarily stored in the RAM 43.
  • the storage device 45 is composed of a ROM, a hard disk (HDD), a solid state drive (SSD), etc.
  • the storage device 45 stores programs executed by the CPU 41, settings related to processing of the second information processing device 4, parameters used for the processing, and the like.
  • the interface 47 connects the second information processing device 4 and other devices. As shown in FIG. 3, the video output device 1 is connected to the interface 47.
  • the interface 47 is an interface for connecting video-related equipment, such as an interface based on the serial digital interface standard, for example.
  • the network interface 49 connects the second information processing device 4 and other devices via a network such as a WAN or LAN. As shown in FIG. 2, the first information processing device 3 and the storage control device 5 are connected to the network interface 49.
  • the network interface 49 directly transmits and receives data between the RAM 43 of the second information processing device 4 and the RAM of other devices using RDMA.
  • the network interface 49 is, for example, a Gigabit Ethernet (registered trademark) interface.
  • the video output device 1 may be connected to the network interface 49 instead of the interface 47.
  • FIG. 4 is a diagram showing the configuration of the storage control device 5. As shown in FIG.
  • the storage control device 5 includes a CPU 51, a RAM 53, a storage device 55, a storage interface 57, and a network interface 59.
  • the CPU 51 executes various processes in the storage control device 5.
  • the CPU 51 executes various processes in the storage control device 5 by executing instructions shown in programs stored in the storage device 55. Note that a part of the processing in the storage control device 5 may be realized by hardware installed in the CPU 51.
  • the RAM 53 temporarily stores data and the like.
  • the RAM 53 temporarily stores instructions for the storage 2, data transmitted and received between the first information processing device 3, the second information processing device 4, and the storage 2, and the like.
  • the storage device 55 is composed of a ROM, a hard disk (HDD), a solid state drive (SSD), and the like.
  • the storage device 55 stores programs executed by the CPU 51, settings related to processing of the storage control device 5, parameters used in the processing, and the like.
  • the storage device 55 stores information for associating the first information processing device 3 and the second information processing device 4 with the access port 21 of the storage 2 .
  • the storage interface 57 connects the storage control device 5 and the storage 2.
  • one storage interface 57 is connected to a plurality of access ports 21 (access ports 21a, 21b) of the storage 2.
  • the present invention is not limited to this, and the storage control device 5 may be provided with a plurality of storage interfaces 57, and one storage interface 57 may be connected to one access port 21.
  • the storage interface 57 is, for example, a PCIe interface compliant with the PCI express standard of the PCI-SIG standard.
  • the storage control device 5 and the storage 2 can transmit and receive data and the like at high speed using a protocol dedicated to non-volatile memory (NVMe (Non-Volatile Memory Express)) using the PCI-Express bus.
  • NVMe Non-Volatile Memory Express
  • the controller acquires data in the NAND memory using the NAND protocol, replaces it with the PCIe protocol, and transfers it to the host side.
  • the DMA controller that directly transfers data to the host side converts and acquires data from NAND memory to SATA protocol, and then converts the data to PCIe protocol and transfers it to the host. Forward. That is, since NVMe processing directly converts the NAND protocol to the PCIe protocol, the data transfer processing speed is high.
  • the network interface 59 connects the storage control device 5 and other devices via a network such as a WAN or LAN. As shown in FIG. 4, the first information processing device 3 and the second information processing device 4 are connected to the network interface 59.
  • the network interface 59 allows direct data transmission and reception between the RAM 53 of the storage control device 5 and the RAM of other devices using RDMA. Further, the network interface 59 is capable of transmitting and receiving data at high speed with other devices using a protocol (NVMe-oF (NVMe over Fabric)) for communication via a network dedicated to solid state drives.
  • the network interface 59 is, for example, a Gigabit Ethernet (registered trademark) interface.
  • FIG. 5 is a diagram showing the configuration of the storage 2. As shown in FIG. The storage 2 includes a plurality of access ports 21 and a memory section 23.
  • the plurality of access ports 21 connect the storage control device 5 and the storage 2.
  • two access ports 21a and 21b are provided.
  • Each access port 21 is provided with a controller 25 (controllers 25a, 25b).
  • the access port 21a is provided with a controller 25a
  • the access port 21b is provided with a controller 25b.
  • the controller 25 executes control regarding the storage 2. Specifically, the controller 25 controls recording of data into the memory section 23 and reading of data from the memory section 23 . The controller 25 also performs other necessary processing on the solid state drive, such as wear leveling.
  • the memory unit 23 constitutes a data recording area of the storage 2.
  • the memory section 23 is composed of a plurality of NAND flash memories.
  • the storage 2 may include a buffer memory (not shown) in addition to the memory section 23.
  • the buffer memory constitutes a storage area that temporarily stores data from the outside and data to the outside.
  • FIG. 6 is a diagram showing the transmission and reception of signals in the port assignment operation.
  • the first information processing device 3 transmits a port allocation request to the storage control device 5. Specifically, the CPU 31 of the first information processing device 3 generates a port assignment request and stores it in the RAM 33.
  • the port allocation request includes identification information of the access port 21 to be allocated to the first information processing device 3. For example, assume that the first information processing device 3 is assigned the access port 21a. In the following description, the access port 21a will be referred to as the first port 21a.
  • the network interfaces 39 and 59 transmit the port assignment request stored in the RAM 33 to the RAM 53.
  • the storage control device 5 Upon receiving the above port allocation request, the storage control device 5 executes a process of allocating the first port 21a to the storage control device 5.
  • the storage control device 5 uses the identification information of the first information processing device 3 (e.g., IP address) and the identification information of the first port 21a of the storage 2 (e.g., the port of the first port 21a). address) and generates a table that associates them.
  • the storage control device 5 can transmit the data to the storage 2 via the first port 21a.
  • the storage control device 5 can transmit the data to the first information processing device 3.
  • step S2 the storage control device 5 transmits a port allocation request to the storage 2 via the first port 21a.
  • the controller 25a that has received this port allocation request executes processing to enable data transmission and reception via the first port 21a.
  • step S3 the controller 25a sends a notification that the above processing has been completed (completion notification) to the storage control device 5 via the first port 21a.
  • This completion notification is stored in the RAM 53.
  • step S4 the network interfaces 39 and 59 transmit the completion notification stored in the RAM 53 to the RAM 33 using RDMA.
  • the first information processing device 3 can recognize that the first port 21a has been assigned to the first information processing device 3, and data (video) can now be transmitted and received via the first port 21a.
  • the second information processing device 4 transmits a port allocation request to the storage control device 5.
  • the port allocation request sent by the second information processing device 4 includes identification information of, for example, the access port 21b, which is the access port 21 that requests the second information processing device 4 to allocate.
  • the access port 21b will be referred to as the second port 21b.
  • the storage control device 5 which has received the port allocation request from the second information processing device 4, performs port allocation processing by, for example, identifying information of the second information processing device 4 and identifying information of the second port 21b of the storage 2. Generate a table that associates. Thereby, when data is transmitted from the second information processing device 4 to the storage control device 5, the storage control device 5 can transmit the data to the storage 2 via the second port 21b. Further, when data is transmitted from the second port 21b, the storage control device 5 can transmit the data to the second information processing device 4.
  • step S6 the storage control device 5 transmits a port allocation request to the storage 2 via the second port 21b.
  • the controller 25b that has received this port allocation request executes processing to enable data transmission and reception via the second port 21b.
  • step S7 the controller 25b sends a completion notification to the storage control device 5 via the second port 21b.
  • This completion notification is stored in the RAM 53.
  • step S8 the network interfaces 49 and 59 transmit the completion notification stored in the RAM 53 to the RAM 43 of the second information processing device 4 using RDMA.
  • the second information processing device 4 can recognize that the second port 21b has been assigned to the second information processing device 4, and data (video) can now be transmitted and received via the second port 21b.
  • FIG. 7 is a diagram showing signal transmission and reception during video readout and recording operations.
  • the video read operation by the first information processing device 3 is first started by the first information processing device 3 transmitting a video read command to the first port 21a of the storage 2 in step S11. .
  • the CPU 31 of the first information processing device 3 generates a read command and stores it in the RAM 33.
  • the read command includes information regarding the video to be read (for example, the recording area in the memory unit 23 where the video is recorded).
  • the network interfaces 39 and 59 transmit the read command stored in the RAM 33 of the first information processing device 3 to the RAM 53 of the storage control device 5 using RDMA.
  • the CPU 51 of the storage control device 5 determines to transmit the read command received from the first information processing device 3 to the storage 2 via the first port 21a. As a result, the read command stored in the RAM 53 is transmitted to the storage 2 via the first port 21a.
  • step S12 the controller 25a that has received the read command transmits the video recorded in the recording area of the memory unit 23 specified in the read command to the first information processing device 3. Specifically, the controller 25a acquires the video from the designated recording area of the memory unit 23, and transmits it to the RAM 53 of the storage control device 5 via the first port 21a and the storage interface 57.
  • the CPU 51 determines that the destination of the video received via the first port 21a is the first information processing device 3.
  • the network interfaces 39 and 59 transmit the video stored in the RAM 53 to the RAM 33 using RDMA.
  • the video readout operation by the second information processing device 4 is similar to the readout operation by the first information processing device 3. Specifically, it is as follows.
  • the second information processing device 4 transmits a video read command to the second port 21b of the storage 2.
  • the controller 25b that has received the read command transmits the video recorded in the recording area of the memory unit 23 specified in the read command to the second information processing device 4.
  • the video recording operation will be explained.
  • the first information processing device 3 uses a video input from the video output device 1 as a video to be recorded.
  • the CPU 31 inputs the video acquired by the video output device 1 as a video to be recorded, and stores it in the RAM 33.
  • the first information processing device 3 transmits a recording command for the video to be recorded to the first port 21a of the storage 2.
  • the CPU 31 generates a recording command for the recording target video and stores it in the RAM 33.
  • the recording command includes information regarding the recording area of the memory unit 23 where the recording target video is to be recorded.
  • the network interfaces 39 and 59 transmit the recording command stored in the RAM 33 to the RAM 53 using RDMA.
  • the CPU 51 determines to transmit the recording command received from the first information processing device 3 to the storage 2 via the first port 21a. As a result, the recording command stored in the RAM 53 is transmitted to the storage 2 via the storage interface 57 and the first port 21a.
  • the first information processing device 3 transmits the video to be recorded to the first port 21a of the storage 2.
  • the network interfaces 39 and 59 transmit the recording target video stored in the RAM 33 of the first information processing device 3 to the RAM 53 of the storage control device 5 using RDMA.
  • the CPU 51 determines to transmit the recording target video received from the first information processing device 3 to the storage 2 via the first port 21a.
  • the recording target video stored in the RAM 53 is transmitted to the storage 2 via the storage interface 57 and the first port 21a.
  • the controller 25a Upon receiving the recording command and the recording target video, the controller 25a records the recording target video in the recording area of the memory unit 23 specified in the recording command. If the recording of the recording target video is successful, the controller 25a transmits a notification to the effect that recording of the recording target video has been completed (completion notification) to the first information processing device 3 (step S17). Specifically, the controller 25a transmits a completion notification to the RAM 53 via the first port 21a and the storage interface 57. The CPU 51 determines that the destination of the completion notification received via the first port 21a is the first information processing device 3. The network interfaces 39 and 59 transmit the completion notification stored in the RAM 53 to the RAM 33 using RDMA.
  • FIG. 8 is a flowchart showing the operation of the first information processing device 3 when an abnormality occurs in the recording operation.
  • FIG. 9 is a flowchart showing the operation of the second information processing device 4 when an abnormality occurs in the recording operation.
  • FIG. 10 is a diagram showing the transmission and reception of signals during a video recording operation when an abnormality occurs.
  • step S21 a video acquired by the video output device 1 is input to the first information processing device 3 as a video to be recorded.
  • the input video to be recorded is stored in the RAM 33 by the CPU 31.
  • step S22 the first information processing device 3 attempts to record the recording target video stored in the RAM 33 into the storage 2 via the first port 21a. Specifically, in step S201, the first information processing device 3 transmits a recording command for recording target video to the first port 21a of the storage 2. Next, in step S202, the first information processing device 3 transmits the recording target video stored in the RAM 33 to the storage 2 via the first port 21a.
  • a more specific recording operation is the same as that described above with reference to FIG. 7, so a description thereof will be omitted here.
  • step S23 As a result of attempting to record the recording target video onto the storage 2, if a message indicating that the recording target video has been completed (that is, a completion notification) is sent (“No” in step S23), the first information processing device 3: Unless an operation to stop the recording operation is performed (as long as step S24 is "No"), steps S21 to S23 described above are repeatedly executed.
  • step S23 step S203
  • the first information processing device 3 instructs the second information processing device 4 to record the video to be recorded on behalf of the first information processing device 3. command. Further, the first information processing device 3 instructs to reset the first port 21a.
  • step S23 If “Yes” in step S23, the process advances to step S25 and step S204, and the first information processing device 3 transmits a reset command to the first port 21a of the storage 2. More details are as follows.
  • the CPU 31 generates a reset command and stores it in the RAM 33.
  • the network interfaces 39 and 59 transmit the reset command stored in the RAM 33 to the RAM 53 using RDMA.
  • the CPU 51 determines to transmit the reset command received from the first information processing device 3 to the first port 21a. As a result, the reset command stored in the RAM 53 is transmitted to the controller 25a via the first port 21a.
  • the controller 25a Upon receiving the reset command, the controller 25a executes the reset of the first port 21a.
  • the controller 25a stops operating due to some abnormality if the controller 25a is restarted by this reset, it becomes possible to send and receive data via the first port 21a.
  • Examples of abnormalities that can be resolved by resetting include an abnormality that occurs while the controller 25a is executing the control program for the first port 21a, and an abnormality that occurs when the buffer memory is full and data cannot be received.
  • the first information processing device 3 instructs the second information processing device 4 to record the video to be recorded in the storage 2 instead of the first information processing device 3 (alternative (referred to as a transmission command). More specifically, the CPU 31 generates an alternative transmission command and stores it in the RAM 33. The network interfaces 39 and 49 transmit the alternative transmission command stored in the RAM 33 to the RAM 53 using RDMA.
  • the first information processing device 3 transmits the area information to the second information processing device 4.
  • the area information is information indicating the recording area of the storage 2 in which an attempt was made to record the recording target video for which recording failed. That is, the area information indicates at which position in the memory unit 23 of the storage 2 the recording target video for which recording has failed is to be recorded.
  • the area information is, for example, a logical block address (LBA) of the memory unit 23 in which the video to be recorded is to be recorded.
  • LBA logical block address
  • the second information processing device 4 executes recording of the recording target video onto the storage 2 in steps S207 to S209.
  • the recording operation of the recording target video onto the storage 2 by the second information processing device 4 will be explained later.
  • step S28 the first information processing device 3 completes resetting the first port 21a. It is determined whether a notification to the effect that the reset has been completed (referred to as a reset completion notification) has been received. Note that the reset completion notification is generated by the controller 25a and transmitted to the RAM 53 via the first port 21a. Thereafter, the network interfaces 39 and 59 transmit the reset completion notification stored in the RAM 53 to the RAM 33 using RDMA.
  • the first information processing device 3 determines that the second information processing device 4 should continue recording the recording target video. If there is a next video to be recorded, the process returns to step S27 (step S206 in FIG. 10), and the first information processing device 3 transmits area information for the next video to be recorded to the second information processing device 4. do. As a result, the second information processing device 4 records the next video to be recorded in place of the first information processing device 3 at the position indicated by the area information of the memory unit 23 of the storage 2 .
  • step S210 the first information processing device 3 determines to end the recording of the recording target video by the second information processing device 4.
  • the first information processing device 3 issues a command to the second information processing device 4 to end recording of the video to be recorded by the second information processing device 4 (alternative transmission cancellation command). call) and send. More details are as follows.
  • the CPU 31 generates an alternative transmission cancellation command and stores it in the RAM 33.
  • the network interfaces 39 and 49 transmit the alternative transmission cancellation command stored in the RAM 33 to the RAM 53 using RDMA.
  • step S21 the process returns to step S21, and the first information processing device 3 resumes recording the recording target video to the storage 2 via the first port 21a (steps S212 to S214).
  • the second information processing device 4 determines whether or not an alternative transmission command has been received from the first information processing device 3 in steps S32 and S205 while executing a predetermined process related to video (step S31).
  • step S32 If the alternative transmission command has not been received (“No” in step S32), the second information processing device 4 continues the predetermined process unless an operation to stop the predetermined process is performed (as long as “No” in step S33). continues execution (that is, returns to step S31).
  • the second information processing device 4 records the recording target video in the storage 2 instead of the first information processing device 3. Note that while the second information processing device 4 is recording the recording target video, it also executes predetermined processing regarding the video in parallel.
  • the area information is transmitted from the first information processing device to the second information processing device 4 in steps S34 and S206.
  • step S35 the second information processing device 4 that has received the area information transfers the recording target video to the storage 2 indicated by the area information received from the first information processing device 3 via the second port 21b. is recorded in the recording area of the memory section 23.
  • the second information processing device 4 transmits a recording command for the video to be recorded to the second port 21b. More details are as follows.
  • the CPU 41 generates a recording command and stores it in the RAM 43. This recording command includes area information received from the first information processing device 3 as information regarding the recording area of the memory section 23 where the recording target video is to be recorded.
  • the network interfaces 49 and 59 transmit the recording command stored in the RAM 43 to the RAM 53 using RDMA.
  • the CPU 51 determines to transmit the recording command received from the second information processing device 4 to the storage 2 via the second port 21b. As a result, the recording command stored in the RAM 53 is transmitted to the storage 2 via the second port 21b.
  • step S208 the second information processing device 4 transmits the video to be recorded to the second port 21b of the storage 2.
  • the details are as follows.
  • the network interfaces 49 and 59 transmit the recording target video stored in the RAM 43 to the RAM 53 using RDMA.
  • the CPU 51 determines to transmit the recording target video received from the second information processing device 4 to the storage 2 via the second port 21b.
  • the recording target video stored in the RAM 53 is transmitted to the storage 2 via the storage interface 57 and the second port 21b.
  • the controller 25b that has received the recording command and the recording target video records the recording area of the memory unit 23 specified in the recording command, that is, the recording area of the memory unit 23 indicated by the area information received from the first information processing device 3. Record the video to be recorded in the area. If the recording target video has been successfully recorded, the controller 25b transmits a completion notification to the second information processing device 4 in step S209.
  • the details are as follows.
  • the controller 25b sends the completion notification to the RAM 53 via the second port 21b and the storage interface 57.
  • the CPU 51 determines that the destination of the completion notification received via the second port 21b is the second information processing device 4.
  • the network interfaces 49 and 59 transmit the completion notification stored in the RAM 53 to the RAM 43 using RDMA.
  • step S36 the second information processing device 4 determines to continue recording the recording target video.
  • step S34, step S206 the second information processing device 4 executes the above step S35 (steps S207 to S209) to The same video as the next recording target video input and stored in the RAM 43 is recorded in the recording area indicated by the area information of the memory section 23 of the storage 2 via the second port 21b.
  • step S36 determines to end the recording of the recording target video, and performs the main function of the second information processing device 4. Only predetermined processing regarding a certain video is executed (that is, the process returns to step S31).
  • the second information processing device 4 when an abnormality occurs in the first port 21a assigned to the first information processing device 3, the second information processing device 4 , records the video to be recorded in the storage 2 instead of the first information processing device 3 .
  • the second information processing device 4 to which the second port 21b is assigned will be able to 1
  • the video to be recorded can be recorded in the storage 2 instead of the information processing device 3.
  • the second information processing device 4 instead of the first information processing device 3 records the video to be recorded in the storage 2
  • area information is transferred from the first information processing device 3 to the second information processing device 4. is transmitted, and the second information processing device 4 records the video to be recorded in the recording area indicated by this area information.
  • the second information processing device 4 can record the recording target video in the same recording area of the memory unit 23 where the first information processing device was trying to record the recording target video.
  • the device when a device other than the second information processing device 4 (for example, the first information processing device 3) reads the video recorded in the storage 2 by the second information processing device 4, the device , it is possible to prevent a video from the wrong recording area (that is, a video different from the video to be read) from being read.
  • the wrong recording area that is, a video different from the video to be read
  • the second information processing device 4 on behalf of the first information processing device 3, performs the recording target video from the time when the substitute transmission command is received until the time when the substitute transmission cancellation command is received. is recorded in storage 2. That is, the second information processing device 4 records the video to be recorded in the storage 2 until the reset of the first port 21a where the abnormality has occurred is started and the first port is restored. In other words, the second information processing device 4 executes recording of the recording target video onto the storage 2 only during the period when an abnormality occurs in the first port 21a.
  • the second information processing device 4 does not unnecessarily record the video to be recorded in the storage 2, so that the second information processing device 4 can devote time to only executing predetermined processing, which is the main function of the second information processing device 4. Can be secured as much as possible.
  • Modification example 1 The following case is assumed in Modification 1.
  • the first information processing device records the input video to be recorded in the storage 2 without performing compression processing.
  • the first information processing device 3 compresses the recording target video in uncompressed format and transmits it to the second information processing device 4, and the second information processing device 4 , the compressed video to be recorded is recorded in the storage 2.
  • FIGS. 11 to 13 FIG. 11 is a flowchart showing the operation of the first information processing device 3.
  • FIG. 12 is a flowchart showing the operation of the second information processing device 4.
  • FIG. 13 is a diagram showing signal transmission and reception.
  • the first information processing device 3 compresses the video that is input from the video output device 1 and is intended to be the video to be recorded, to generate a compressed video to be the video to be recorded.
  • the first information processing device 3 converts an uncompressed video that is intended to be a recording target video into a compressed format video, or lowers the bit rate, resolution, frame rate, etc. of the video that is intended to be a recording target video.
  • Compressed video can be generated using methods such as .
  • step S48 After generating the compressed video, in step S48 and steps S306 to S307, the first information processing device 3 transmits the generated compressed video together with area information to the second information processing device 4 as a video to be recorded.
  • step S55 the second information processing device 4, which has received the area information and the compressed video (step S54), uses the compressed video as the video to be recorded, and uses the memory unit 2 of the storage 2 indicated in the received area information. Record in the recording area.
  • processing contents in steps S41 to S46 and steps S49 to S50 in FIG. 11 are the same as the processing contents in steps S21 to S26 and steps S28 to S29 in FIG. 8, respectively, so a detailed explanation will be omitted.
  • the processing contents in steps S51 to S53 and step S56 in FIG. 12 are the same as the processing contents in steps S31 to S33 and step S36 in FIG. 9, respectively, so a detailed explanation will be omitted.
  • the processing contents in steps S301 to S305 and steps S308 to S315 in FIG. 13 are the same as the processing contents in steps S201 to S205 and steps S207 to S214 in FIG. 10, respectively, so a detailed explanation will be omitted.
  • the first information processing device 3 compresses the video input from the video output device 1 to generate a compressed video
  • the second information processing device 4 records the compressed video in the storage 2 as a recording target video.
  • the second information processing device 4 can record the recording target video onto the storage 2 in a short time.
  • the second information processing device 4 when the second information processing device 4 records the recording target video in the storage 2 instead of the first information processing device 3, the second information processing device 4 sets the amount of processing resources used for predetermined processing regarding the video to the normal amount. (That is, when recording of the recording target video to the storage 2 is not executed) may be decreased.
  • the "processing resource amount” refers to, for example, the ratio of the time used by the CPU 41 of the second information processing device 4 for predetermined processing to the time used for recording the recording target video, Refers to the amount of RAM 43 used for this purpose.
  • the recording of the recording target video to the storage 2 may be performed based on the transfer information TI, which is the area information plus additional information, instead of the area information.
  • the transfer information TI is information that includes information regarding the transfer source of the video to be recorded (referred to as transfer source information) in addition to the area information described above.
  • the transfer information TI includes transfer source information INF1, transfer size information INF2, transfer destination port information INF3, and area information INF4. Note that the transfer information TI shown in FIG. 14 is used when the video to be recorded is composed of a plurality of unit data and the recording of the video to be recorded is performed in units of this unit data.
  • FIG. 14 is a diagram showing an example of transfer information TI.
  • the transfer source information INF1 is information regarding the transfer source of the video to be recorded, and is information indicating the location of the video to be recorded. As shown in FIG. 14, the transfer source information INF1 is expressed, for example, in the format of "device identification name where the video to be recorded exists_location of the video to be recorded in the RAM in the device". For example, the transfer source information INF1 expressed as "0011_0001" indicates that the unit data of the video to be recorded is recorded at the address "0001" of the RAM 33 of the first information processing device 3 (device identification name: 0011). .
  • the transfer size information INF2 represents the size of unit data that is the unit of transmission and reception of the video to be recorded.
  • the transfer size information INF2 expressed as "4K" indicates that the size of the unit data is 4 kilobytes.
  • the transfer destination port information INF3 indicates through which access port 21 of the storage 2 the video to be recorded is recorded.
  • the transfer destination port information INF3 expressed as "0" indicates that the recording target video is recorded in the memory unit 23 of the storage 2 via the first port 21a.
  • the area information INF4 is the same information as the area information explained above. That is, the area information INF4 indicates the recording area of the memory unit 23 of the storage 2 where the recording target video is to be recorded. For example, area information INF4 expressed as “0008” indicates that the unit data of the video to be recorded is recorded at address “0008” of the memory unit 23.
  • the first line of the transfer information TI shown in FIG. This indicates that the information processing device 3 records at address “0008” of the memory unit 23 of the storage 2 via the first port 21a.
  • FIG. 15 is a flowchart showing the operation of the first information processing device 3.
  • FIG. 16 is a flowchart showing the operation of the second information processing device 4.
  • FIG. 17 is a diagram showing transmission and reception of signals.
  • step S61 in FIG. 15 After inputting the video to be recorded from the video output device 1 and storing it in the RAM 33 (step S61 in FIG. 15), the CPU 31 of the first information processing device 3 generates transfer information TI in step S62 in FIG. Remember.
  • the first information processing device 3 After generating the transfer information TI, the first information processing device 3 records the recording target video based on the generated transfer information TI in step S63 of FIG. 15 (steps S401 to S403 and steps S412 to S414 of FIG. 17). Execute.
  • the controller 25a that has acquired (the unit data of) the recording target video records the acquired recording target video in the recording area (address) of the memory unit 23 indicated by the area information INF4 of the transfer information TI. If the recording target video has been successfully recorded, the controller 25a transmits a completion notification to the first information processing device 3 (step S414). On the other hand, if recording of the recording target video fails, an error notification is sent to the first information processing device 3 (step S403).
  • the first line of the transfer information TI shown in FIG. 14 is recorded at the address "0002" of the RAM 43 as shown in the first line of the changed transfer information TIa shown in FIG. is converted to indicate that the second information processing device 4 records the unit data of the video to be recorded having a size of Ru.
  • the first information processing device 3 After converting the transfer information TI into transfer information TIa (step S68), the first information processing device 3 transmits the transfer information TIa to the second information processing device 4 (step S69).
  • the second information processing device 4 stores the received converted transfer information TIa in the RAM 43.
  • the second information processing device 4 After receiving the transfer information TIa (step S84), the second information processing device 4 executes recording of the recording target video based on the transfer information TIa (step S85).
  • step S407 the second information processing device 4 transmits the transfer information TIa stored in the RAM 43 to the storage 2 via the second port 21b along with the recording command.
  • the controller 25b which has received the recording command and the converted transfer information TIa, sends (the unit of) the video to be recorded stored at the address of the RAM 43 indicated in the transfer source information INF1 of the transfer information TIa via the storage control device 5. data) (step S408).
  • the controller 25a records the acquired video to be recorded in the recording area (address) of the memory unit 23 indicated by the area information INF4 of the transfer information TIa. If the recording target video has been successfully recorded, the controller 25b transmits a completion notification to the second information processing device 4 (step S409).
  • the recording of the video to be recorded in the storage is performed based on the transfer information TI, TIa that includes at least the area information INF4 and the transfer source information INF1 regarding the transfer source of the video to be recorded.
  • a recording target video existing at an appropriate position in the first information processing device 3 or the second information processing device 4 can be recorded in an appropriate recording area of the storage 2.
  • the storage control device 5a may have a plurality of network interfaces (network interfaces 59a, 59b).
  • FIG. 19 is a diagram showing the configuration of a video recording system 100a according to modification 4.
  • the first information processing device 3 is connected to the network interface 59a (referred to as a first network interface 59a).
  • the first port 21a is assigned to the first network interface 59a for transmitting and receiving data to and from the storage 2.
  • the first information processing device 3 and the second information processing device 4 are connected to the network interface 59b (referred to as a second network interface 59b).
  • a second port 21b is assigned to the second network interface 59b for transmitting and receiving data to and from the storage 2.
  • the network interfaces 59a and 59b are, for example, network switches.
  • the video to be recorded by the first information processing device 3 is transmitted via the first network interface 59a and the first port 21a, or via the second network interface 59b and the second port 21b. , can be recorded in storage 2.
  • the video to be recorded is transferred from the first information processing device 3 to the storage 2 via the first network interface 59a and the first port 21a. (first mode).
  • the video to be recorded is transmitted to the storage 2 via the second network interface 59b and the second port 21b (second mode). That is, the video to be recorded is transmitted to the storage 2 via different network addresses in normal and abnormal times.
  • the video to be recorded is recorded in the first mode in the storage 2 via the first network interface 59a and the first port 21a, and in the storage 2 via the second network interface 59b and the second port 21b.
  • the data is recorded in the storage 2 in a switchable manner between the second recording mode and the second recording mode.
  • the network interfaces 59a, 59b for transmitting the recording target video are switched, or the network If an abnormality occurs in either of the interfaces 59a, 59b, the destination access ports 21a, 21b to which the video to be recorded is transmitted are switched. This makes it possible to build a system that is resistant to abnormalities.
  • the second information processing device 4 may be connected to the first network interface 59a. Furthermore, both the first port 21a and the second port 21b may be assigned to each network interface 59a, 59b. In this case, each network interface 59a, 59b may be able to select which access port 21a, 21b is used to transmit and receive data.
  • the video recording system of the present disclosure includes a video output device, a storage, a first information processing device, and a second information processing device.
  • the video output device outputs video.
  • the storage has multiple access ports.
  • the first information processing device is connected to the video output device, is assigned a first port among the plurality of access ports of the storage for transmitting and receiving data, and transmits the recording target video input from the video output device to the first port. Record to storage via.
  • the second information processing device is assigned a second port among the plurality of access ports of the storage for transmitting and receiving data, and executes predetermined processing regarding video.
  • the first information processing device when an abnormality occurs in the first port of the storage, the first information processing device sends area information indicating the recording area of the storage where the recording target video is to be recorded to the second information processing device. Send.
  • the second information processing device records the video to be recorded in the recording area of the storage indicated by the area information received from the first information processing device via the second port.
  • the first port when an abnormality occurs in the first port of the storage, the first port may be reset. In this case, the recording of the recording target video onto the storage by the second information processing device may be performed from when the reset of the first port is started until the first port is restored.
  • the second information processing device does not unnecessarily record the video to be recorded in the storage, so that it is possible to secure the maximum amount of time that can be devoted to only executing predetermined processing.
  • the second information processing device is connected to the video output device and outputs the same video as the recording target video input to the first information processing device. It may also be input from the device. In this case, the second information processing device may record the same video input from the video output device in the storage as the recording target video. In this video recording system, the second information processing device can record the same video as the recording target video in the storage as the recording target video without receiving the recording target video from the first information processing device.
  • the first information processing device may generate the recording target video by compressing the video input from the video output device.
  • the video to be recorded can be recorded in the storage 2 in a short time.
  • the second information processing device when the second information processing device records the recording target video in the storage, the second information processing device increases the amount of processing resources used for the predetermined processing compared to normal times. May be decreased. In this video recording system, since the second information processing device can use more processing resources for recording the video to be recorded, it is possible to record the video to be recorded at high speed.
  • the first information processing device, the second information processing device, and the storage may be capable of transmitting and receiving data using a protocol dedicated to nonvolatile memory using a PCI-Express bus. Thereby, recording of the recording target video can be executed at high speed.
  • Another video recording system of the present disclosure includes a video output device, a storage, a first information processing device, and a storage control device.
  • the video output device outputs video.
  • the storage has multiple access ports.
  • the first information processing device is connected to a video output device.
  • a storage and a first information processing device are connected to the storage control device.
  • the storage control device allocates a first port among the plurality of access ports of the storage for transmitting and receiving data, a first network interface to which the first information processing device is connected, and a first port among the plurality of access ports of the storage. and a second network interface to which two ports are assigned for transmitting and receiving data and to which the first information processing device is connected.
  • the recording target video input by the first information processing device from the video output device is recorded in the storage via the first network interface and the first port
  • the second mode is recorded in the storage via the first network interface and the first port.
  • a second mode in which the data is recorded in the storage via the second port.
  • the present disclosure is applicable to a video recording system that records video from a video output device in storage.
  • Video recording system 1 Video output device 2: Storage 21: Access port 21a: First port (access port) 21b: 2nd port (access port) 23: Memory section 25, 25a, 25b: Controller 3: First information processing device 31: CPU 33: RAM 35: Storage device 37: Interface 39: Network interface 4: Second information processing device 41: CPU 43: RAM 45: Storage device 47: Interface 49: Network interface 5: Storage control device 51: CPU 53: RAM 55: Storage device 57: Storage interface 59: Network interface 59a: First network interface 59b: Second network interface 6: External device INF1: Transfer source information INF2: Transfer size information INF3: Transfer destination port information INF4: Area information TI , TIa: Transfer information

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004133897A (ja) * 2002-09-06 2004-04-30 Hitachi Ltd ストレージ・ネットワークにおけるイベント通知
JP2006133926A (ja) * 2004-11-04 2006-05-25 Hitachi Ltd ストレージ装置
JP2019075677A (ja) * 2017-10-16 2019-05-16 Ｎｅｃプラットフォームズ株式会社 ネットワークカメラ、それを含むネットワークカメラシステム、その通信制御方法、通信制御装置、および通信制御プログラム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004133897A (ja) * 2002-09-06 2004-04-30 Hitachi Ltd ストレージ・ネットワークにおけるイベント通知
JP2006133926A (ja) * 2004-11-04 2006-05-25 Hitachi Ltd ストレージ装置
JP2019075677A (ja) * 2017-10-16 2019-05-16 Ｎｅｃプラットフォームズ株式会社 ネットワークカメラ、それを含むネットワークカメラシステム、その通信制御方法、通信制御装置、および通信制御プログラム

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