Method and device for writing and reading disk video data

Abstract

The invention is applicable to the technical field of disk storage data, and provides a method and a device for writing and reading disk video data and a terminal device, and the disk video data writing method comprises the steps: dividing a disk into M continuous disk blocks with the same storage space, and enabling M to be greater than or equal to 1; allocating continuous index blocks corresponding to the disk blocks one by one in a storage medium different from the disk according to the number of the disk blocks; according to the storage space of each disk block, sequentially writing videodata into each disk block according to a sequence; updating a corresponding index block according to the information of the video data stored in each disk block, due to the fact that an index and dataphysical medium separation mode and an index design mode are adopted, addressing operation is reduced in a mode of writing disk data in sequence, I / O operation is reduced by writing data in a large block in a disk block, and the disk writing and reading efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of disk storage data, in particular to a method and device for writing and reading video data on a disk. Background technique [0002] Usually writing a disk requires two parts: addressing and writing data. The addressing time actually includes two parts: the seek time and the rotation waiting time; the time for the head to locate to the track is the seek time, and the time for waiting for the disk to rotate to the correct position The time is called rotation latency. The purpose of disk addressing is to find the starting sector of the file to be read, and then start writing data in the corresponding sector. Compared with disk addressing, it takes much less time to write data in the corresponding sector of the disk. [0003] However, the prior art usually adopts random writing or skipping writing with a predetermined strategy when writing to the disk, which requires addressing every time data is written. A...

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method and device for writing and reading disk video data, so as to solve the problem of using random writing or skipping writing with a predetermined strategy in the prior art, resulting in the need to seek data every time data is written. At the same time, the amount of data written each time is relatively small, which increases disk input / output operations and greatly reduces the problem of writing disk efficiency

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