WO2018171266A1 - Procédé et dispositif de mémorisation de données de surveillance vidéo - Google Patents

Procédé et dispositif de mémorisation de données de surveillance vidéo Download PDF

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Publication number
WO2018171266A1
WO2018171266A1 PCT/CN2017/115710 CN2017115710W WO2018171266A1 WO 2018171266 A1 WO2018171266 A1 WO 2018171266A1 CN 2017115710 W CN2017115710 W CN 2017115710W WO 2018171266 A1 WO2018171266 A1 WO 2018171266A1
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WIPO (PCT)
Prior art keywords
video surveillance
data
surveillance data
video
flash block
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PCT/CN2017/115710
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English (en)
Chinese (zh)
Inventor
林杰华
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深圳市江波龙电子有限公司
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Publication of WO2018171266A1 publication Critical patent/WO2018171266A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
    • G06F12/023—Free address space management
    • G06F12/0253—Garbage collection, i.e. reclamation of unreferenced memory
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
    • G06F12/023—Free address space management
    • G06F12/0238—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
    • G06F12/0246—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0629—Configuration or reconfiguration of storage systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
    • G06F3/0652—Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Definitions

  • the video surveillance system can be divided into one or more channels according to the number of monitoring channels, that is, one or more scenarios are monitored.
  • Multi-channel monitoring corresponds to multiple video files, and video files monitored by different channels are stored in the memory through the same interface.
  • Flash memory In a video surveillance system, a flash memory is often used as a memory. Flash memory consists of multiple flash blocks, each containing multiple pages. In the conventional method, each video file is sequentially written into the same flash block in the order in which the data is written, that is, more than one video file stored in the same flash block. Due to the limited storage space of the flash memory, the storage space allocated to each video file is limited, and the video data stream of each channel is different. The monitoring video of a certain code stream consumes a relatively fast storage space, which will result in the video file of the channel. The storable space is used up before the storable space of other video files. In this case, the invalid data of the video in the flash block needs to be deleted to obtain free space for the latest file storage of the video.
  • flash erase is performed in units of blocks, and deleting expired video files monitored by a certain channel requires erasing all blocks in which expired video files are located.
  • more than one video file is stored in the flash block.
  • the page occupied by the video file stored in the flash block becomes a dirty page (the page whose stored data has expired)
  • the other monitored video in the flash block The page occupied by the file may still be a valid page (the page where the stored data has not expired).
  • the conventional method is exemplified by a total of four channels of monitoring in the video monitoring system, which are A, B, C, and D.
  • the 4-way monitoring corresponds to 4 video files. 4 channels of video every interval The pieces will be stored in flash memory in turn. Please refer to Table 1.
  • 4 video files can be named A1, Bl, Cl, Dl.
  • 4 video files can be named A2, B2, C2, D2. , So on and so forth. Since the branching multiplexing method is adopted, the storage of each segment is sequentially stored in the page of the flash block in the order from A to D.
  • the total storage space of the flash memory is limited, and the storage space allocated to the 4-way video file is also limited.
  • the A channel consumes more storage space than the other three video files.
  • the expired A channel video needs to be deleted to obtain the space of the A channel video storing the latest inter-segment, and it is necessary to delete the invalid data A5, A6, A7, A8, which needs to be Before erasing the blocks where A5, A6, A7, and A8 are located, first move the pages occupied by the B, C, and D channels in the block to the memory, and then erase the flash memory where A5, A6, A7, and A8 are located. Block, finally move the B-channel, C-channel, and D-way valid page data in the memory back to the corresponding page position of the previous flash block. This way, the storage space is extremely inefficient, and the loss of the flash block is also large.
  • a video surveillance data storage method includes:
  • the video surveillance data After receiving the video surveillance data again, the video surveillance data is directly stored in the allocated flash block.
  • a video surveillance data storage device includes:
  • a recording module configured to receive one channel of video surveillance data, store the video surveillance data into a specified flash block, and record the number of times the video surveillance data is stored;
  • a flash block allocation module configured to allocate a corresponding flash block for the video surveillance data of the channel when the number of times the video surveillance data is stored reaches a first threshold
  • a storage module configured to store the video surveillance data in the allocated flash block directly after receiving the corresponding flash block for the video surveillance data.
  • the video monitoring data storage method and device receive one video surveillance data, store the video surveillance data into a designated flash block, and record the number of times the video surveillance data is stored. When the number of times the video surveillance data is stored reaches the first threshold, the corresponding video block is allocated to the video surveillance data, and then the video surveillance data is received again, and the video surveillance data is directly stored to the allocated In the flash block.
  • a flash block corresponding to a certain video surveillance data stored in a specified flash block exceeding a first threshold is used to store the aforementioned video surveillance data.
  • An electronic device comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory is stored for execution by the at least one processor An instruction, the instructions being executed by the at least one processor to enable the at least one processor to perform the method described above.
  • a non-transitory computer readable storage medium storing computer executable instructions for causing the electronic device to perform the above method when the computer executable instructions are executed by an electronic device .
  • a computer program product comprising: a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, wherein the program instructions are electronically
  • the device executes ⁇ to cause the electronic device to perform the above method.
  • the flash block Because the corresponding flash block only stores one video monitoring data, if all the video monitoring data stored in the corresponding flash block becomes invalid data, the flash block can be erased as a whole. Video surveillance data files that affect other roads. Each erase can reclaim a complete flash block, thus improving the storage efficiency of the storage space, and only one data is stored in one flash block, so when the data in the flash block is invalid data, the whole Erasing can be done, avoiding moving the valid files of other paths to the memory and then moving them back, reducing the loss of the flash blocks.
  • FIG. 1 is an application environment diagram of a method for monitoring video data storage in an embodiment
  • FIG. 2 is a flow chart of a method for monitoring video data storage in an embodiment
  • FIG. 3 is a flow chart of a method for monitoring video data storage in an embodiment
  • FIG. 4 is a flow chart of a method for monitoring video data storage in an embodiment
  • FIG. 5 is a flow chart of a method for monitoring video data storage in an embodiment
  • FIG. 6 is a flow chart of a method for monitoring video data storage in an embodiment
  • FIG. 7 is a schematic diagram of a video surveillance data storage method received in the first three times in the embodiment.
  • FIG. 8 is a schematic diagram of a method for storing video surveillance data received after more than 3 times in an embodiment
  • FIG. 9 is a schematic structural diagram of a monitoring video data storage device in an embodiment
  • FIG. 10 is a schematic structural diagram of a monitoring video data storage device in an embodiment
  • FIG. 11 is a schematic structural diagram of a monitoring video data storage device in an embodiment
  • FIG. 12 is a schematic structural diagram of a monitoring video data storage device in an embodiment
  • the FTL stores the video surveillance data in the normal flash memory block again, and records the number of times the video surveillance data is stored in the normal flash memory block from the FTL.
  • Step 260 When the number of times the video surveillance data is stored reaches the first threshold, the corresponding flash block is re-allocated for the video surveillance data.
  • Step 270 after receiving the video surveillance data again, directly storing the video surveillance data into the reallocated flash block.
  • the dedicated flash block that is full and all of the invalid data is erased in a block. , making it a free block for the latest video files to store.
  • the video surveillance data is stored in the normal flash block, and the number of times the video surveillance data is stored in the ordinary flash block is recorded.
  • the new dedicated flash block is re-allocated for the video surveillance data, and the received video surveillance data is stored in the re-allocated dedicated flash block. .
  • a dedicated flash block is allocated to one channel of video surveillance data, when the allocated dedicated flash block is full, the dedicated flash block that is full and all of the invalid data can be erased in a block, thereby becoming empty.
  • Dedicated flash blocks are available for new video surveillance data storage. Therefore, the storage efficiency of the storage space is improved, and the loss of the flash block is small.
  • more than one video file is stored in the flash block, and when the page occupied by the video file stored in the flash block is occupied by a dirty page (the page whose stored data has expired), other channels in the flash block are monitored. The page occupied by the video file may still be a valid page (the page where the stored data has not expired).
  • a video monitoring data storage method including:
  • Step 410 Receive multiple video surveillance data.
  • the multi-channel video surveillance system includes multiple camera devices.
  • the camera device transmits the video surveillance data to the storage device and finally stores it in the storage device.
  • FTL Flash Translation Layer
  • flash Translation Layer Flash Translation Layer
  • the function of F TL is to effectively write data and data to the flash memory, and can effectively manage all the written data. When it is necessary to read data from the storage device, the FTL must accurately calculate the data to be read. Flash address for accurate data acquisition.
  • the FTL receives the multi-channel video surveillance data transmitted by the imaging device, and transmits not only the data but also the write address and the data length of the transmission data (not necessary).
  • Step 420 Store the video surveillance data into the designated flash block, and record the number of times each video surveillance data is stored.
  • the FTL pre-associates the flash memory into a normal flash block and a dedicated flash block, and the designated flash block is a normal flash block.
  • a normal flash block can receive various video surveillance data, and a dedicated flash block is used to assign to the corresponding video surveillance data.
  • the received multi-channel video surveillance data is first stored in a normal flash block, and the number of times each video surveillance data is stored in a normal flash block is recorded. Each video file will be written to the same normal flash block in the order in which the data is written, that is, more than one video file stored in the same normal flash block.
  • Step 430 When the number of times the video surveillance data is stored reaches the first threshold, the corresponding video block is allocated to the video surveillance data.
  • Step 440 After the corresponding flash block is allocated for the video surveillance data, when the received video monitoring data is determined to be the video surveillance data, the video surveillance data is acquired.
  • the FTL judges each received video surveillance data to determine whether it is the video surveillance data of the channel, and if the determination result is yes, acquires the received video. Monitor data.
  • the specific determining step is: comparing the address of the video monitoring data received each time with the address of the video monitoring data stored last time, and generating a comparison result. If the comparison result is that the address is continuous, then the receiving is performed.
  • the video surveillance data is the video surveillance data of the channel, so the video surveillance data received this time is obtained, and the video surveillance data received this time is stored in the corresponding dedicated flash memory. Just in the block.
  • the video surveillance data is directly stored in the dedicated flash block.
  • Step 450 Store the video surveillance data directly into a corresponding flash block allocated for the video surveillance data.
  • the FTL receives the multi-channel video surveillance data, and stores the received multi-channel video surveillance data into the ordinary flash memory block, and records each video surveillance data in the ordinary The number of times stored in the flash block.
  • FTL allocates a dedicated flash block for the video surveillance data.
  • the received video monitoring data is the video monitoring data of the channel
  • the video monitoring data is acquired, and the video monitoring data is directly stored into a corresponding flash block allocated for the video monitoring data of the channel.
  • the method for managing a flash block by the FTL method allocates a corresponding dedicated flash block for each video monitoring data stored in a normal flash block for a number of times exceeding a first threshold, thereby storing each data in a separate manner.
  • a different dedicated flash block When the code stream of a certain surveillance video is large, the dedicated flash block or the dedicated flash block group allocated to the video surveillance data is used up first, then when all the files stored in a dedicated flash block are invalid data, It is possible to directly erase this flash block as a whole to free up empty flash blocks for redistribution. Therefore, the storage space is highly efficient, avoids repeated erasing, and improves the service life of the flash block.
  • more than one video file is stored in a flash block, and when a page occupied by a video file stored in a flash block is occupied as a dirty page (a page whose stored data has expired), the flash block is in the flash block.
  • the pages occupied by other road-monitored video files may still be valid pages (pages where stored data has not expired). This requires moving the valid page data outside the dirty pages of these blocks to the memory of the monitoring device before erasing the block where the expired video files are located, and then performing an overall erase operation on these flash blocks, and finally The valid page data moved to the memory is moved back to the corresponding page position of the block in which it was previously located.
  • the recovery method of the traditional method storage space is extremely low, and the effective page needs to be copied before the flash block is erased, and the number of erasing and erasing of the flash memory is limited, and the repeated erasing and writing of the flash block is large.
  • a video monitoring data storage method further includes: [0080] Step 460: Receive multiple video surveillance data, and record the number of times that the video surveillance data is not continuously received.
  • the FTL has allocated a dedicated flash block to the received multi-channel video monitoring data, and each video monitoring data is stored in the corresponding dedicated flash block, and the receiving condition of each video monitoring data needs to be recorded. Specifically, the number of times that the video monitoring data of a certain channel is not received continuously is counted. For example, if there are 4 channels of video monitoring data of A, B, C, and D, then the received AACDDAADDCCD is the 12 channels that have not been received continuously. Video surveillance data.
  • the FTL collects statistics on the number of times that the video monitoring data is not received continuously. If the number of times that the video monitoring data is not received continuously reaches the second threshold, the video surveillance data is released to the dedicated dedicated flash block. Occupation, that is, this dedicated flash block is no longer exclusive to this video surveillance data, can be assigned to other channels of video surveillance data storage.
  • the FTL records the reception status of each video surveillance data to which the dedicated flash memory block has been allocated, and if the number of times that the video surveillance data has not been received continuously reaches the second threshold, the path is released.
  • the video surveillance data has a possession of the assigned dedicated flash block so that this dedicated flash block can be allocated for use by other video surveillance data stores.
  • the dedicated flash block is occupied by the video surveillance data from start to finish. This will not cause a dedicated flash block to be occupied, but no data is written, and a whole dedicated flash block is wasted, so that the full use of each dedicated flash block is realized, and the storage efficiency is improved.
  • a video monitoring data storage method further includes:
  • Step 610 When the address of the video monitoring data received this time is not continuous with the address of each video monitoring data received last time, the video monitoring data received this time is stored in a specified flash block. And record the number of times the video surveillance data is stored.
  • the file system allocates an address for each video surveillance data, for example, a total of 4 video surveillance data, the file system first assigns the address of the A channel to 0xl0000-lFFFFF, and the address assigned to the B channel is 0x20000- 2FFFFF, the address assigned to the C channel is 0x30000-3FFFFF, and the address assigned to the D channel is Ox 40000-4FFFFF, when the address allocated to the A channel OxlOOOO-lFFFFF is used up and the other paths are not used up. At this point, the file system will reassign the address to channel A, for example, address 0x50000-5FFFFF.
  • the video monitoring data received this time is stored in the ordinary flash memory block, and the number of times the video monitoring data is stored is recorded.
  • the video surveillance data of the previous segment is released from the exclusive flash block, so that this dedicated flash block can be used by other channels.
  • Step 620 When the number of times the video surveillance data is stored reaches the first threshold, the corresponding flash block is allocated for the video monitoring data.
  • a dedicated flash block is allocated for the video surveillance data.
  • the first threshold can be set according to the actual situation.
  • a dedicated flash block can be allocated at a time, or a dedicated flash block group can be allocated at a time. This dedicated flash block group contains multiple dedicated flash blocks.
  • Step 640 Acquire video surveillance data whose comparison result is consecutive addresses, and the video surveillance data is the video surveillance data of the channel.
  • Step 650 Store the video surveillance data directly into the allocated flash block.
  • the video surveillance data of a certain path when the address of the video surveillance data of a certain path is not continuous, the video surveillance data of the previous segment is released from the dedicated flash block, and the received video surveillance is re-received.
  • the data is stored in a normal flash block and the number of stores is counted, and when the first threshold is exceeded, the new dedicated flash block is reassigned.
  • a method of monitoring video data storage is provided that is exemplified for use in an environment as shown in FIG. [0096] Assuming a total of A, B, C, D 4 video surveillance data, the file system assigns an address to each video surveillance data, the address assigned by the A channel is 0xl0000-lFFFFF, and the address assigned to the B channel is 0x2000. 0-2FFFFF, the address assigned to the C channel is 0x30000-3FFFFF, and the address assigned to the D channel is 0x40000-4 FFFFF.
  • the recording module 1120 is further configured to receive the multi-channel video monitoring data, and record the number of times that the video monitoring data is not continuously received.
  • the release module 1160 is configured to release the possession of the video surveillance data to the allocated flash block if the number of times the video surveillance data is not received continuously reaches the second threshold.
  • the apparatus further includes: an address comparison module 1170 and an acquisition module.
  • the recording module 1120 is further configured to: when the address of the video monitoring data received this time is not continuous with the address of each video monitoring data received last time, store the video monitoring data received this time to a designated one. In the flash block, and record the number of times the video surveillance data is stored;
  • the flash block allocation module 1130 is configured to allocate a corresponding flash block for the video surveillance data when the number of times the video surveillance data is stored reaches a first threshold.
  • the address comparison module 1170 is configured to compare the address of each received video surveillance data with the address of the last stored video surveillance data after the corresponding flash block is allocated, to generate a comparison result;
  • the obtaining module 1180 is configured to obtain video surveillance data whose alignment result is consecutive addresses, where the video surveillance data is the video surveillance data of the channel;
  • the electronic device 140 includes:
  • the processor 141 and the memory 142 may be connected by a bus or the like, and the bus connection is taken as an example in FIG.
  • the memory 142 is a non-volatile computer readable storage medium, and can be used for storing non-volatile software programs, non-volatile computer-executable programs, and modules, such as video surveillance data storage in the embodiments of the present application.
  • the method corresponds to a program instruction/module (for example, the method shown in FIG. 2 to FIG. 6).
  • the processor 1 41 performs various functional applications and data processing by executing non-volatile software programs, instructions, and modules stored in the memory 142, that is, implementing the video monitoring data storage method of the above method embodiment.
  • the memory 142 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may be stored according to the use of the video surveillance data storage device. Data, etc.
  • memory 142 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
  • memory 142 can optionally include memory remotely located relative to processor 141, which can be connected to the video surveillance data storage device over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • the one or more modules are stored in the memory 142, and when executed by the one or more processors 141, performing a video surveillance data storage method in any of the foregoing method embodiments, for example, performing the above
  • the method steps in Figures 2 through 6 are described and the functions of the modules in Figures 5 through 13 are implemented.
  • Embodiments of the present application provide a non-transitory computer readable storage medium storing computer-executable instructions that are executed by one or more processors, such as A processor 141 in FIG. 14 may enable the one or more processors to perform the video surveillance data storage method in any of the above method embodiments, for example, to perform the method steps and implementations in FIG. 2 to FIG. 6 described above.
  • a processor 141 in FIG. 14 may enable the one or more processors to perform the video surveillance data storage method in any of the above method embodiments, for example, to perform the method steps and implementations in FIG. 2 to FIG. 6 described above.
  • the embodiment of the present application provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, the program instructions being One or more processors executing, such as one processor 141 in FIG. 14, may cause the one or more processors to perform the video surveillance data storage method in any of the above method embodiments For example, the method steps in FIGS. 2 to 6 described above and the functions of the modules in FIGS. 5 to 13 are performed.
  • the device embodiments described above are merely illustrative, wherein the unit described as a separate component may or may not be physically distributed, and the component displayed as a unit may or may not be a physical unit. , that is, it can be located in one place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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Abstract

La présente invention concerne un procédé et un dispositif de mémorisation de données de surveillance vidéo, consistant : à recevoir un trajet de données de surveillance vidéo, à mémoriser les données de surveillance vidéo dans un bloc flash spécifié et à enregistrer un nombre de fois où le trajet de données de surveillance vidéo est mémorisé ; lorsque le nombre de fois où le trajet de données de surveillance vidéo est mémorisé atteint un premier seuil, à attribuer un bloc flash correspondant pour le trajet de données de surveillance vidéo, puis à mémoriser directement le trajet de données de surveillance vidéo dans le bloc flash attribué si le trajet de données de surveillance vidéo est à nouveau reçu. Étant donné que le bloc flash correspondant ne possède qu'un trajet de données de surveillance vidéo mémorisé dans ce dernier, le bloc flash peut être totalement écrasé si la totalité du trajet de données de surveillance vidéo mémorisé dans le bloc flash correspondant devient invalide, et ainsi d'autres trajets de fichiers de données de surveillance vidéo ne seront pas affectés, ce qui permet d'éviter l'étape consistant à déplacer les autres trajets de fichiers valides vers et depuis la mémoire, et d'augmenter l'efficacité de récupération de l'espace mémoire et de réduire la perte de blocs flash.
PCT/CN2017/115710 2017-03-24 2017-12-12 Procédé et dispositif de mémorisation de données de surveillance vidéo WO2018171266A1 (fr)

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