Device and method for securely storing video data

Abstract

The invention provides a safety storage device of video data. The safety storage device comprises a special partition table module, an index block module and a data block module; the data block module comprises a data block header module, a data block header backup module and a corresponding data recording module. When the data block header module is damaged, access to the data recording module can be gained through information of the data block header module; the data block header module and the data block header backup module are composed of completely identical component units, to be specific, block number recording units, attribute recording units, bad block identifier recording units, idle identifier recording units, busy identifier recording units, random number identifier recording units, and cyclic redundancy check units. By the use of the safety storage device, data storage safety and stability can be improved, and the inherent defects of an FAT (file allocation table) system are overcome.

Description

technical field [0001] The invention relates to the field of embedded file systems, in particular to a video data storage device. Background technique [0002] Among the current hard disk video recorders, those based on PC and acquisition card generally use Windows system, and the file system mostly uses NTFS or FAT32; while the file system used by embedded hard disk video recorders is different from the embedded operating system selected by the manufacturer and its research and development capabilities. close relationship. At present, the embedded operating systems used in embedded hard disk video recorders include RTOS, pSOS, embedded Linux, VxWorks, etc., and generally use the FAT file system. [0003] With the increasing demand for hard disk video recorders, the traditional FAT format file system gradually becomes incapable, such as low read and write efficiency, limited disk capacity and partition size, limited file size, no power-off protection function, and low file ...

AI Technical Summary

Problems solved by technology

This is prone to frame loss between packets

At the same time, the hard disk head needs to read and write data and file indexes frequently, and the head jumps frequently. For a DVR system that reads and writes hard disk continuously for more than ten to 24 hours a day, it is very easy to cause hard disk failure.

In addition, there are still two risks in the FAT file system used for video recorder video data management: one is that if the file allocation table is damaged, most of the video data will be lost; and recovery

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