An embedded video data storage method
A technology for data storage and data storage format, which is used in image communication, TV, color TV components, etc., can solve the problems of frequent writing, unrecoverable data, and increased disk fragmentation, reducing the probability of disk damage, reliable The effect of efficient data storage and efficient data retrieval
Active Publication Date: 2017-11-14
ANHUI TSINGLINK INFORMATION TECH
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Problems solved by technology
A general-purpose file system cannot control the timing of writing to the disk. It may occur that writing is too frequent, or data is written when the device is most turbulent, which increases the probability of disk damage.
[0006] 2. Fault tolerance and data recovery of partial disk damage
For a general-purpose file system, the impact on data damage cannot be evaluated after disk bad blocks appear. If the damage is in the index part, the data on the entire disk may be lost and the data cannot be recovered.
There is also no way to achieve fault tolerance for a small number of bad blocks
[0007] 3. After an abnormal power failure and restart, there will be problems such as file loss, file index table damage, etc.
[0008] 4. Disk fragmentation problem
The common file system, after a long time of use, especially the frequent write operation of video recording, will cause increased disk fragmentation, thus affecting the operating performance of the entire device
Method used
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[0056] The present invention will be further described below in conjunction with accompanying drawing:
[0057] A kind of embedded video data storage method, this storage method comprises the following steps:
[0058] (1) Set the video data storage format;
[0059] Such as figure 1 As shown, the video recording data storage format includes a disk header, an index area, a data area, a backup index area and a backup disk header. All kinds of header information stored on the disk are stored in units of 512 bytes (the size of the disk sector). In order to avoid data errors (usually the disk is damaged), 16 bytes of verification data are stored in front. When the verification When it fails, it means that the sector has been damaged.
[0060] Both the disk header and the backup disk header are used to record the information of the disk. By setting the backup disk header, it is possible to prevent the data in the disk header from being unusable due to disk damage. There is also ...
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The present invention relates to an embedded video data storage method, which includes the following steps: 1. Setting the video data storage format; 2. Writing the video data according to the video data storage format; 3. Searching the video data according to the video data format ; 4. According to the video data storage format, read the video data. The method can effectively avoid the problems existing in the existing general file system, not only can store data reliably and efficiently, but also can realize efficient data retrieval and data reading.
Description
technical field [0001] The invention relates to the field of security technology, in particular to an embedded video data storage method. Background technique [0002] With the improvement of public safety awareness, there are more and more video surveillance applications. Traditional fixed-point monitoring cannot meet the monitoring needs of moving objects such as vehicles. video recording equipment. [0003] At present, the storage medium of surveillance video recording is considered comprehensively in terms of capacity and cost performance, and mechanical hard disk is the first choice. This is because the amount of video data is very large, and only mechanical hard disks can meet the demand for video storage time, while non-mechanical solid-state drives are not only expensive, but also have a storage capacity that cannot meet the video storage time requirements. For example, general monitoring requires the preservation of video recordings of more than half a month. The...
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IPC IPC(8): H04N5/781
Inventor 王小敏项敏敏郑浩钱立斌
Owner ANHUI TSINGLINK INFORMATION TECH