Video playback method and device

A video and video storage technology, applied in the field of video rewind playback method and device, can solve the problem of data extraction speed burdened by video storage equipment

Active Publication Date: 2014-08-06
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention provides a video reverse playback method and device to

Method used

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  • Video playback method and device
  • Video playback method and device

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Embodiment Construction

[0028] According to the prior art, during the video rewinding playback process, one I frame of data is extracted each time, which increases the burden on the recording storage device and reduces the data extraction speed.

[0029] In view of the above problems, an embodiment of the present invention provides a video reverse playback method, the method comprising:

[0030] The data management device receives the video reverse playback instruction, retrieves the corresponding video storage area on the hard disk of the video storage device, and the corresponding video storage area includes a plurality of groups, each group includes a plurality of adjacent frame group data, and the plurality of Include n I frame data in adjacent frame group data;

[0031] The data management device performs the following operations for each group according to the reverse order between the groups: extract n I-frame data in the group in the corresponding video storage area in forward order and put t...

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Abstract

The invention provides a video playback method and device. The method comprises the steps that a video playback command is received, a corresponding video storage region is searched out, the corresponding video storage region comprises at least one group, and each group comprises n I-framed data; according to the video playback command and the reverse order of the groups, all the groups are subjected to the following operations that the n I-framed data in the groups in the corresponding video storage region are extracted in the forward order to be stored in a playback buffer memory space, and frames are taken out reversely in the playback buffer memory space and sent to a video play device for playing. Every time when a group of I-framed data is extracted, the frequency of rotation of a video storage device hard disk is reduced, the data reading speed is improved, pressure and damage of the hard disk are relieved, and the playback performance is improved.

Description

technical field [0001] The present invention relates to the technical field of video monitoring, in particular to a method and device for reversing video playback. Background technique [0002] Due to its authenticity, reliability, and universality, video surveillance technology has been widely used and developed rapidly in various industries such as security, transportation, finance, and education. In addition to being used for real-time monitoring, the digitized video data of video surveillance can also be stored first for subsequent playback. [0003] The method for playing back video data in the prior art includes: the on-demand playback module extracts one frame of data from the storage device, and extracts one piece of data each time. For example, if figure 1 As shown, the magnetic head remains still, the hard disk of the video storage device rotates clockwise at a constant speed, and the data is written into the hard disk of the video storage device in the order of ...

Claims

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Application Information

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IPC IPC(8): H04N5/76H04N7/18
Inventor 江萍石岩许勇
Owner ZHEJIANG UNIVIEW TECH CO LTD
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