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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1502.06314cs.MMcs.NI
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云上的众包直播

Crowdsourced Live Streaming over the Cloud

Fei Chen, Cong Zhang, Feng Wang, Jiangchuan Liu

摘要:

在当今用于媒体生成和分发的丰富工具以及方便的互联网接入的支持下,众包流媒体通过包括视频频道的大量贡献者来推广单源流媒体范例。它调用了从众包到流媒体服务器到最终用户的路径上的联合优化,以最大限度地减少整体延迟。视频源的动态性、全球化的请求需求以及来自每个源的高计算需求使得众包直播流具有挑战性,即使具有来自现代云计算的强大支持。在本文中,我们提出了一个通用的框架,促进了具有成本效益的云服务的众包直播。通过自适应租赁,云服务器可以以细粒度提供,以适应地理分布的视频众包。针对不同租赁价格的云实例间的服务迁移问题,提出了一种最优的解决方案。它还解决了位置对流式传输质量的影响。为了了解所提出的策略在现实世界中的性能,我们构建了一个在planetlab和Amazon/Microsoft Cloud上运行的原型系统。我们广泛的实验表明,我们的解决方案在部署成本和流媒体质量方面的有效性。

英文摘要:

Empowered by today's rich tools for media generation and distribution, and the convenient Internet access, crowdsourced streaming generalizes the single-source streaming paradigm by including massive contributors for a video channel. It calls a joint optimization along the path from crowdsourcers, through streaming servers, to the end-users to minimize the overall latency. The dynamics of the video sources, together with the globalized request demands and the high computation demand from each sourcer, make crowdsourced live streaming challenging even with powerful support from modern cloud computing. In this paper, we present a generic framework that facilitates a cost-effective cloud service for crowdsourced live streaming. Through adaptively leasing, the cloud servers can be provisioned in a fine granularity to accommodate geo-distributed video crowdsourcers. We present an optimal solution to deal with service migration among cloud instances of diverse lease prices. It also addresses the location impact to the streaming quality. To understand the performance of the proposed strategies in the realworld, we have built a prototype system running over the planetlab and the Amazon/Microsoft Cloud. Our extensive experiments demonstrate that the effectiveness of our solution in terms of deployment cost and streaming quality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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