远程教育系统的连续媒体流

IF 3.3 Q1 EDUCATION & EDUCATIONAL RESEARCH
A. Dashti, Maytham Safar
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引用次数: 4

摘要

远程教育在传输大型同步连续流媒体(SM)对象方面带来了新的挑战。在本文中,我们考虑了定制SM表示的框架设计,其中每个表示由许多SM对象组成,这些对象应该被检索并以一致的方式显示给用户。我们描述了一个检索优化器(Prime),它捕获了用户查询、用户配置文件和会话配置文件所带来的灵活性和需求。然后,它决定如何将这个查询脚本强加给连续媒体(CM)服务器,以减少争用。我们还提供了一个成本模型来评估每个提议的计划。最后,我们解释了内存缓冲在缓解服务器带宽碎片问题中的作用。我们的初步实验结果表明了我们所提出的模型和技术在生成接近最优检索方面的可行性和有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Streaming of Continuous Media for Distance Education Systems
Distance education created new challenges regarding the delivery of large size isochronous continuous streaming media (SM) objects. In this paper, we consider the design of a framework for customized SM presentations, where each presentation consists of a number of SM objects that should be retrieved and displayed to the user in a coherent fashion. We describe a retrieval optimizer (Prime) that captures the flexibilities and requirements imposed by the user query, user profile, and session profile. Then, it determines how this query script should be imposed against the continuous media (CM) server to reduce contention. We also provide a cost model to evaluate each proposed plan. Finally, we explain the role of memory buffering in alleviating the server bandwidth fragmentation problem. Our preliminary experimental results show the feasibility and effectiveness of our proposed model and techniques in generating near optimal retrieval.
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来源期刊
CiteScore
9.10
自引率
0.00%
发文量
14
期刊介绍: Discussions of computational methods, algorithms, implemented prototype systems, and applications of open and distance learning are the focuses of this publication. Practical experiences and surveys of using distance learning systems are also welcome. Distance education technologies published in IJDET will be divided into three categories, communication technologies, intelligent technologies.
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