Encapsulation and Marking of MPEG-4 Video Over IP Differentiated Services

Traditional IP network offer users best-effort service. In this model, all user packets compete equally for network resources. Much attention is being given to developing IP QoS (Quality of Service), which allows network operators to offer differing levels of treatment to user packers. In this article, we investigate QoS interaction provisioning between MPEG-4 video applications and IP DifJerv networks. QoS interaction is performed through intelligent encapsulation and marking of MPEG-4 Elementary Streams (video, audio, signaling, Scenes and Object Descriptors) on IP Diffserv 's AF/EF Per Hop Behaviors. Our contribution to this issue is twofold: First, we analyze the different proposals for MPEG4 encapsulation protocols over RTPLP, and second, we propose and evaluate a videooriented marking mechanism for IP Diflserv edge routers. Performance evaluation is carried through simulation using ns2.