A Diffserv Model for Video Stream

摘要

Video plays an important role in security monitoring, intelligent traffic surveillance, streaming media and other fields. As the internet technology evolves, especially increasing of 4G network coverage further expands the scope of its application. As a kind of multimedia service with strong time correlation; video surveillance not only needs to occupy larger network bandwidth, but also requires very strict network transmission delay. This leads to many problems of video stream such as poor picture quality and long latency due to the network bandwidth and limited device processing capacity. To solve the problems above, a kind of quality of service model named Diffserv is proposed in this paper. It concludes pockets classification, traffic monitoring, congestion avoidance, network congestion management etc. Meanwhile the network test of video data stream is carried out and the test results are given.