Video recording method and device of digital video recording equipment

Abstract

The invention provides a video recording method and device of digital video recording equipment. The method comprises the steps that after being formatted, a disk is divided into a plurality of data blocks, multiple data blocks form a data set, the disk is provided with at least two data sets, and set allocation bitmaps of the data sets and block bitmaps of the data blocks are established, wherein the set allocation bitmaps record the state of each data set, and the block bitmaps record the state of each data block; after the request for writing data into the disk is received, the data sets in the idle state are searched for according to the set allocation bitmaps, and the data sets are set to be in working state, the data sets are searched for the data blocks in the idle state according to the block bitmaps, the data blocks are set to be in the working state, and data are written into the data blocks in the data sets; after data wiring is completed, if the data sets have remaining storage space, the data sets are set to be in the idle state. The video recording device is used for video recording by the adoption of the video recording method. The video recording method and device can reduce fragments generated in the video recording process.

Description

technical field [0001] The invention relates to the field of digital video recording, in particular to a video recording method of a digital video recording device and a video recording device using the video recording method. Background technique [0002] Existing digital video equipment, such as digital video recorder (Digital Video Recorder, DVR) can be used to record video data in real time, and store the recorded video data in a disk as a storage medium. This technology is widely used in vehicles such as driving recorders. etc. electronic equipment. [0003] Since the digital video equipment records video data in real time and stores the video data in the disk, if the video data is not continuously stored in the disk, file fragments are likely to occur, resulting in a slowdown in disk read and write speed. [0004] Therefore, the invention patent application with the publication number CN1750164A discloses an invention titled "A Digital Video Recorder File Management M...

AI Technical Summary

Problems solved by technology

[0005] However, this method must divide the hard disk into multiple files after the hard disk is formatted, each newly created file must be initialized to 0x00 or 0xFF, and the size of each file is fixed, so it cannot be modified in the subsequent recording process file size

If the parameters of the video data change, such as the change of the resolution of the image, the change of the length of a recording period, etc., these will cause the change of the file size of the video data, and the modification of the parameters of the video data will be restricted by applying the above method

In addition, because this method needs to set the index area to record the status information of each video data file, once the index file is lost, it means that all data file information is lost

[0006] In addition, because the existing digital video equipment simultaneously inputs multi-channel data in parallel, that is, the disk needs to write multiple channels of data in parallel. However, using the above-mentioned method, the multiple channels of data are likely to be stored in the disk interleavedly, often resulting in large amount of debris generated

Moreover, because the existing technology repeatedly deletes the files that have been written, and a data file may not be completely filled, resulting in a large number of fragments when repeatedly deleting data, which all lead to a decline in the performance of the digital video equipment

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