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Technology advances are giving people increasingly immersive multimedia experiences in their home entertainment systems, on their portable media players, on their desktop and laptop computers, and even on their mobile phones. A media overlay can enable new media capabilities in the network, while improving the end-user media performance and the system-wide efficiency of the network for both its media and non-media traffic. A variety of advanced capabilities can be incorporated in a media overlay to improve the media delivery performance for end users or to improve the network utilization. This paper highlights some of the advanced capabilities that have been developed in recent years.