Audio and video remote monitoring method and system based on 3G network

Abstract

The invention discloses an audio and video remote monitoring method based on 3G (the 3rd generation telecommunication) network and an audio and video remote monitoring system based on 3G network. The method comprises the following steps: 1) embedded terminals and a monitoring server are provided; 2) the embedded terminals collect onsite audio and video in real time; 3) the embedded terminals detect network delay in real time and dynamically regulate QP ( quasi peak ) value, frame rate and code rate, perform H264 encoding the onsite audio and video according to the QP value, the frame rate and the code rate, and then send the encoded audio and video to the monitoring server; and 4) a currently embedded terminal receives the encoded audio and video according to a control command from the monitoring server, decodes the audio and video and then outputs the decoded audio and video to users. The system comprises the monitoring server and a plurality of embedded terminals, wherein each embedded terminal comprises an audio and video collecting module, a central processing unit, a network receiving and sending module, emergent monitoring keys and an audio and video output module; and the central processing unit includes a delay detecting module, an encoding parameter regulating module and an audio and video encoding module. The audio and video remote monitoring method based on 3G network and the audio and video remote monitoring system based on 3G network according to the invention have the advantages of good bandwidth dynamic adaptability, fluent audio and video, and good monitoring quality.

Description

technical field [0001] The invention relates to the technical field of remote monitoring, in particular to a 3G network-based audio and video remote monitoring method and system. Background technique [0002] Using audio and video for real-time remote monitoring can understand the situation of the monitored place in real time, which is convenient for corresponding security work. With the development of 3G mobile communication technology, 3G-based mobile audio and video monitoring has become possible. Because traditional monitoring equipment requires an external network cable, its implementation cost and implementation difficulty are relatively high, so the possibility of application and promotion in actual mobile monitoring are not very good. [0003] Therefore, 3G mobile monitoring has become a major trend in the field of monitoring. At present, there are many different types of 3G mobile monitoring equipment. The system and method for real-time image monitoring of the vi...

AI Technical Summary

Problems solved by technology

[0004] The common feature of the above four patents is that they all use 3G mobile network as the network carrier to construct different monitoring systems, and their defects mainly lie in the following aspects: ① the above-mentioned first patent only uses 3G mobile network for audio monitoring; Video data transmission, the transmission process is described, but the control method of data transmission bandwidth is not clearly stated, and the device cannot perform local decoding and display; The method of data transmission is explained, that is, when the network bandwidth is sufficient, the entire video data packet is transmitted, and when the network bandwidth is not enough, only I-frame video data transmission is performed. Once the I / P frame ratio is too large, only Carry out an I frame refresh, and the picture pauses; 3. in the above-mentioned third patent, for the process of 3G transmission, processes such as calling, interaction, control, etc. ④ In the fourth patent mentioned above, a complete system composed of foreground and background is described, and the working process of the system is explained in detail, but the front-end equipment cannot be decoded and displayed, and at the same time The 3G network transmission of video data is not dynamically controlled

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