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Audio video data prerecording method and device

A technology of audio, video and data, applied in the field of audio and video data pre-recording methods and devices, capable of solving problems such as high hardware requirements and limited duration of pre-recorded data files

Inactive Publication Date: 2013-10-23
ZHEJIANG DAHUA TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a method and device for pre-recording audio and video data, which is used to solve the problem that the time length of pre-recorded data files in audio and video monitoring in the prior art is limited, and a large-capacity memory is required for pre-recording, which requires high hardware requirements The problem

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  • Audio video data prerecording method and device
  • Audio video data prerecording method and device
  • Audio video data prerecording method and device

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0026] figure 2 It is a flowchart of a method for pre-recording audio and video data provided by an embodiment of the present invention.

[0027] Including step 201, the collected audio and video data is stored in a volatile memory, such as a cache queue in a dynamic RAM, static RAM, cache and other types of memory.

[0028] Step 202, when the cache queue is full, write the audio and video data in the cache queue into a pre-recorded data file located in a non-volatile memory (such as a large-capacity memory such as a mechanical hard disk or a sol...

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Abstract

The invention relates to the field of audio video monitoring, and particularly to an audio video data prerecording method and device. The method comprises: storing acquired audio video data in the buffer memory queue of a volatile memory; when the buffer memory queue is full, writing the audio video data in the buffer memory queue into the prerecording data file of a nonvolatile memory and emptying the buffer memory queue for continuous storage of the acquired audio video data; and when the properties of the data packet in the prerecording data file conform to preset conditions, deleting the data packet. In the embodiment of the invention, the large-volume nonvolatile memory is utilized for real-time reservation of the prerecording data file, the memory requirements are lower, and the cost of the whole system becomes obviously lower than that of the scheme of using a memory as a carrier of the prerecording data file.

Description

technical field [0001] The invention relates to the field of audio and video monitoring, in particular to a method and device for pre-recording audio and video data. Background technique [0002] Audio and video monitoring is an important part of the security system. Through audio and video monitoring, the cost of social security maintenance can be effectively reduced. At present, audio and video monitoring has been widely used in various fields. [0003] In audio and video monitoring, due to the characteristics of audio and video data, the storage space occupied by audio and video data is large, and the higher the definition of audio and video data, the larger the storage space required. With the advancement of technology, the storage capacity of audio and video surveillance storage devices is getting larger and larger, but it still cannot meet people's higher and higher requirements for audio and video clarity. Therefore, in order to record more useful audio and video dat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/76H04N7/18
Inventor 秦丰林杨斌张兴明傅利泉朱江明吴军吴坚
Owner ZHEJIANG DAHUA TECH CO LTD
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