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Wireless video monitoring system and method for dynamically regulating code stream according to network state

A technology of wireless video surveillance and video surveillance system, applied in closed-circuit television systems, wireless communications, transmission systems, etc., can solve the problems of small reduced space and low frame rate, so as to reduce the size of the code rate, reduce the loss rate, improve the The effect of decoding efficiency

Inactive Publication Date: 2011-03-23
SHENZHEN ZTE NETVIEW TECH
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Problems solved by technology

This method is only applicable to the on-demand system mentioned in the patent, and is not applicable to the wireless video surveillance system, because in the wireless video surveillance system, the frame of the code stream itself sent by the front-end equipment of the fixed network video surveillance system The rate is very small, and the reduction space is quite small; therefore, it is necessary to propose a new solution to keep the video screen on the mobile phone smooth

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  • Wireless video monitoring system and method for dynamically regulating code stream according to network state
  • Wireless video monitoring system and method for dynamically regulating code stream according to network state
  • Wireless video monitoring system and method for dynamically regulating code stream according to network state

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Embodiment Construction

[0035] The core idea of ​​the present invention is: the mobile phone terminal uploads the packet loss rate of the RTP video data to the mobile video access unit according to the RTCP protocol, and the mobile video access unit performs a check on the video transmitted from the fixed network video monitoring system according to the packet loss rate. The key frame interval and bit rate of the data are adjusted to realize the adaptive change of the bit stream transmission and ensure the smooth playback of real-time video data under different wireless network conditions.

[0036] Key frame is an important frame in inter-frame compression coding, also called I frame. If the I frame interval is set too large, it may be forced to use B / P frame instead when I frame must be used. Once I frame If it is lost during transmission, the B frame and P frame that depend on the I frame during decoding are invalid even if they can be received, and cannot be decoded. When the packet loss rate is h...

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Abstract

The invention discloses a wireless video monitoring system and a method for dynamically regulating a code stream according to network state. The method comprises that: when the wireless video monitoring system performs real-time video data transmission, a mobile video access unit regulates the key frame interval and code rate of the video data adaptively according to the packet loss rate of the video data reported by a mobile terminal before the video data transmitted by the fixed network video monitoring system is forwarded to the mobile terminal. When the system and the method are adopted, a mobile terminal can play real-time video data smoothly in network environments in all states.

Description

technical field [0001] The invention relates to the field of mobile video monitoring, in particular to a wireless video monitoring system and a method for dynamically adjusting code streams according to network status. Background technique [0002] see figure 1 , which shows the schematic diagram of the composition of the wireless video surveillance system. figure 1 The wireless video surveillance system shown is expanded from the existing fixed network video surveillance system. In the original fixed network video surveillance system, a server of a mobile video access unit 12 is newly added. 11's real-time video browsing request, and request real-time video data from the fixed network video monitoring system 13, and forward it to the mobile terminal 11 after receiving the video data. [0003] figure 2 A schematic diagram of the related protocols of the wireless video surveillance system is given. The session negotiation between the mobile video access unit and the mobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N7/26H04L29/06H04W88/02H04N19/115
Inventor 侯腾蛟卢海峰谢斌庄建东
Owner SHENZHEN ZTE NETVIEW TECH
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