Video streaming is predicted to become the dominating traffic in mobile broadband networks. At the same time, adaptive HTTP\nstreaming is developing into the preferred way of streaming media over the Internet. In this paper, we evaluate how different\ncomponents of a streaming system can be optimized when serving content to mobile devices in particular. We first analyze\nthe media traffic from a Norwegian network and media provider. Based on our findings, we outline benefits and challenges for\nHTTP streaming, on the sender and the receiver side, and we investigate how HTTP-based streaming affects server performance.\nFurthermore, we discuss various aspects of efficient coding of the video segments from both performance and user perception\npoint of view. The final part of the paper studies efficient adaptation and delivery to mobile devices over wireless networks. We\nexperimentally evaluate and improve adaptation strategies, multi link solutions, and bandwidth prediction techniques. Based on\nthe results from our evaluations, we make recommendations for how an adaptive streaming system should handle mobile devices.\nSmall changes, or simple awareness of how users perceive quality, can often have large effects.
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