Method for recording video with hard-disk based digital video recorder and hard-disk based digital video recorder

Abstract

The invention discloses a method for recording video with a hard-disk based digital video recorder and the hard-disk based digital video recorder. The method includes the steps that hard disk space is divided into low-bit-rate storage space and high-bit-rate storage space, and the video recording time meeting the storage requirement of the low-bit-rate storage space is longer than the video recording time meeting the storage requirement of the high-bit-rate storage space; video data are collected, the video data are coded according to the high bit rate and the low bit rate, the coded low-bit-rate video data are stored into the low-bit-rate storage space, and the coded high-bit-rate video data are stored into the high-bit-rate storage space. Through the scheme, the effective video recording time can be prolonged while high-quality video recording is guaranteed.

Description

technical field [0001] The invention relates to data storage technology, in particular to a video recording method of a digital hard disk video recorder and the digital hard disk video recorder. Background technique [0002] Digital Video Recorder (DVR, Digital Video Recorder) is a set of computer systems for image storage and processing, with the functions of long-term recording, remote monitoring and control of images and voices. [0003] In the existing DVR video recording solution, after video data is collected, the video data is encoded according to a preset bit rate, and the encoded video data is stored in the hard disk space. see figure 1 , which is a schematic diagram of the hard disk usage of the existing channel, and the channel is the alias of a camera connected to the DVR. In the figure, the total capacity of hard disk space is S, all of which are used for storage of high-quality video data. [0004] Video quality is determined by factors such as resolution, f...

AI Technical Summary

Problems solved by technology

[0005] At the same time, due to the fixed hard disk space, the video quality is inversely proportional to the effective time of recording. The higher the quality stored in the hard disk space, the shorter the video recording time stored in the hard disk space; Long recording time will reduce the video quality, if you choose high-quality video, it will result in shortening the recording time

If it is possible to extend the effective recording time while ensuring high-quality video recording, it will further meet the demand, but there is no technology in this area at present

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