Changyeol Choi

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The recent advance in wireless network technologies has enabled the streaming media service on the mobile devices such as PDAs and cellular phones. Since the wireless network has low bandwidth channels and mobile devices are actually composed of limited hardware specifications , the transcoding technology is needed to adapt streaming media to the given(More)
For Video-On-Demand (VOD) systems, it is important to provide Quality of Service (QoS) to more clients under limited resources. In this paper, the performance scalability in cluster-based VOD servers is studied with several grouping configurations of cluster nodes. To find performance bottlenecks, the monitoring functions are employed and the maximum QoS(More)
In this paper, we propose a multi-view video service framework suitable for mobile environments. The proposed framework generates intermediate views in near real-time and overcomes the limitations of mobile services by adapting the multi-view video according to the processing capability of a mobile device as well as the user characteristics of a client. By(More)
In this paper, we propose a new broadcasting scheme, called P2P broadcasting, for eliminating the service latency time of the existing broadcasting schemes. Our broadcasting scheme is based on the simplest staggered broadcasting protocol and then we use peer to peer caching technique, in which a number of clients that share a segment of a stream delivered(More)
Due to the limited resources in thin-clients on mobile devices and the large amount of computation for decoding streaming media, it is not easy to support the QoS of streaming media for thin-client on mobile environment. To solve the problems, the terminal servers would be charged for decoding the streaming media and thin-clients have a role to update only(More)