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Monitoring data playback method, EC (Encoder) and video management server

A technology for managing servers and monitoring data, which is applied in the field of data transmission, can solve problems such as large bandwidth occupation and large data volume, and achieve the effect of reducing bandwidth consumption

Active Publication Date: 2011-09-21
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the length of a GOP data is generally 1 second or 2 seconds. Since the I frame stores a complete image, the amount of data is large, so it will occupy a large bandwidth during playback.

Method used

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  • Monitoring data playback method, EC (Encoder) and video management server
  • Monitoring data playback method, EC (Encoder) and video management server
  • Monitoring data playback method, EC (Encoder) and video management server

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] figure 2 The flow chart of the monitoring data playback method provided by the embodiment of the present invention, such as figure 2 As shown, the specific steps are as follows:

[0041] Step 201: The EC receives the video data collected by the surveillance camera, and encodes the video data in units of GOP. Wherein, when the GOP is the first GOP in a continuous time period, only I frame encoding is performed for the first frame of the GOP, and only P frame encoding is performed for the subsequent frames of the GOP; when the GOP is a continuous time period When it is not the first GOP in the GOP, for the first frame of the GOP, EC performs I frame coding and P frame coding at the same time to obtain I frame and P' frame; for subsequent frames of the GOP, EC only performs P frame coding to obtain Subsequent P frames.

[00...

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PUM

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Abstract

The invention discloses a monitoring data playback method, an EC (Encoder) and a video management server. The monitoring data playback method comprises the following steps: the EC receives video data acquired by a monitor camera and encodes the video data; the EC encodes an I frame and a P frame simultaneously to the first frame of a GOP (Group of Pictures) when a non-first GOP in a continuous time period is encoded; the EC executes interframe coding to other frames except for the first frame of the GOP; the EC writes the encoded frame into a storage device; a management server receives a playback request transmitted by a client and finds out a corresponding GOP in the storage device, wherein the first frame of the read first GOP is taken as the I frame, residual frames of the first GOP are taken as frames obtained by the interframe coding, the first frame of the read other GOP is taken as the P frame, and the residual frames are taken as frames obtained by the interframe coding; and the management server returns the read frame to the client. Through the monitoring data playback method, the EC and the video management server, the bandwidth occupied by the playback of monitoring data is reduced.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to a monitoring data playback method, an encoder (EC, Encoder), and a video management server (DM, Data Management). Background technique [0002] At present, the IP storage area network (IPSAN, Internet Protocol Storage Area Network) is used as a common storage application in the monitoring system, and the data collected by the camera is stored in the IPSAN. When the user needs to view the historical video, the video data is read from the IPSAN. [0003] figure 1 Given the existing typical IP monitoring network, such as figure 1 As shown, the data storage and playback process is as follows: [0004] Data storage process: EC encodes the video data collected by the camera and writes it into IPSAN in units of GOP (Group of Picture). A GOP includes an I frame and several P frames. [0005] Data playback process: the video client (VC, Video Client) or decoding client (DC, D...

Claims

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Application Information

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IPC IPC(8): H04N7/18H04N7/26H04N5/93H04N19/114H04N19/503
Inventor 陈乾业周迪
Owner ZHEJIANG UNIVIEW TECH CO LTD
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