The projection screen system helps you solve the video conference mosaic and tailing

The network connects the entire world, and video conferencing makes each other more real. Among the many applications within the organization, many companies have listed video conferencing as one of the core applications that must be developed at present or in the future, and have made great strides into the ranks of establishing a video network, upgrading from standard definition to standard definition, and from standard definition to high definition. However, the intermittent effects of video conferences, mosaics, tailing, and even out-of-sync sound and image phenomena have seriously affected the internal communication process and efficiency of the organization, which is really a headache. Why is the problem of video conferencing so difficult to solve? Let's look at the main cause of video conferencing itself. Video conferencing is a very expensive application, which has very high requirements on the external network environment. Bandwidth and packet loss rate are the two most demanding conditions for video conferencing. For example, Polycom's HDX8000 series requires a single-channel 1-to-1 bandwidth of 2Mbps. If the bandwidth does not meet this requirement, once the video traffic such as portrait sports increases, the picture will immediately face mosaic, card and other phenomena. However, the impact of packet loss is more direct, causing frame loss, and severely mosaic. Although many more advanced video conferencing equipment are responding to this kind of network emergencies, they will use partial mosaic edge blur, soften the mosaic phenomenon, or directly reduce the high definition to standard definition, but these will affect the real user experience: The money for high-definition video conferencing is not as good as standard-definition or even general-definition. Why are traditional solutions helpless in the face of video conferencing? When the video conferencing effect is not good, I immediately think of QOS. But can QOS really solve the problem? The answer is no. In the face of traffic guarantee for ordinary applications, QOS has an indispensable contribution to achieving orderly transmission of data with different priority levels through the application layered model. But QOS has a fatal flaw. In the face of instantaneous burst traffic, QOS has a certain delay due to its own scheduling mechanism, and the control of burst traffic is too slow to converge, which will cause the video conference to be impacted in an instant. If there are frequent bursts of traffic in the network, it is not difficult to explain 'I have already done QOS, why the video is still mosaic'. Another killer of video conferencing is network packet loss. We can divide packet loss into two categories: one is the packet loss of the link itself, which is caused by the operator's network itself. The packet loss of the link itself is well understood, such as cross-operator and cross-border. In the case of packet loss on the link itself, the quality of the link cannot be changed even if the bandwidth is increased, and the video also suffers from frame loss. However, it should be noted that even in a very high-quality carrier MPLS VPN, there may be packet loss when the traffic on the carrier's network bursts, and this kind of packet loss may not be perceivable through commands such as ping. Severe packet loss on the one hand causes direct video frame loss, on the other hand, it also reduces the performance of the entire network. The actual achievable throughput will be much smaller than the nominal network bandwidth, which exacerbates the harsh external environment of the video conference. Another type of packet loss is the loss of packets caused by the contradiction between large traffic and insufficient bandwidth. Large traffic and insufficient bandwidth will directly lead to an increase in bandwidth utilization, an increase in network delay, and even packet loss. In this way, even if the video channel is guaranteed by QOS for the video conference, the overall link quality is poor, and the video conference will also have problems. Sangfor's wide area network optimization (WOC) video conference ready solution perfectly solves the problem of using video conferences. There are three obstacles in front of video conferences: packet loss, burst traffic impact, and insufficient bandwidth. Sangfor's video ready solution starts from these three aspects to help eliminate Various problems of video conference, immediately resume smooth enjoyment. First, solve the problem of insufficient width of the 'road'. Through Sangfor Wide Area Network Optimization (WOC), an absolute guarantee channel is allocated for video conferencing in the existing line, such as 2Mbps, to ensure that the road for video conferencing is sufficient. When the video conference is opened, the channel will be absolutely guaranteed to the video conference; when the video conference is closed, the channel bandwidth will be released for other business data to be allocated according to the preset priority model. Second, solve the reckless person in the 'road'-burst traffic. Sangfor's wide area network optimization (WOC) divides the absolute guarantee channel, and a copper wall and iron wall will be built on the periphery of the channel, which can effectively prevent the impact of sudden traffic. At the same time, the wide area network optimization (WOC) contains a burst flow control function, which can quickly perform flow control convergence in response to the impact of burst flow, adding another layer of protection for video bandwidth guarantee. Third, solve the quality problem of the 'road'-packet loss. Sangfor Wide Area Network Optimization (WOC) unique video packet loss optimization technology can realize real-time perception of network quality in the channel, and use specific algorithms to quickly recover video packet loss to prevent mosaic, intermittent and other phenomena caused by video frame loss. Let the video conference resume smooth effect immediately. Finally, reduce the overall congestion of the 'roadSangfor Wide Area Network Optimization (WOC) can reduce the traffic in the line by 60%-95% through technologies such as stream characteristic data optimization and high-efficiency stream compression. Use creates sufficient bandwidth. Application access needs to reduce the transmission traffic, which also accelerates the access of ERP, OA, MAIL and other applications in the network.