WiVision: a wireless video system for real-time distribution and on-demand playback

First IEEE Consumer Communications and Networking Conference, 2004. CCNC 2004. Pub Date : 2004-04-19 DOI:10.1109/CCNC.2004.1286925

Pradipta De, Srikant Sharma, Andrew Shuvalov, T. Chiueh

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引用次数: 16

Abstract

The ability to deliver digital video over wireless networks is an enabling technology for many useful applications, ranging from home entertainment and security monitoring to enterprise messaging and military reconnaissance, and thus represents the holy grail of wireless technology development. We describe a wireless video delivery system, WiVision, which uses IEEE 802.11 wireless LANs as the last mile for both real-time video distribution and on-demand video playback. WiVision can air both live events, such as on-campus seminars and sports activities, and prestored video streams, such as course lectures and financial analysis sessions, to mobile users, who can tune in to selected channels of their choice from their laptops or PDAs. An innovative feature of WiVision is the support for random video access based on keyword-search, where keywords are extracted from the closed-caption text embedded in TV programs. In addition, WiVision is able to broadcast video streams on the wireless link while seamlessly working with commercially available media players. The paper presents the implementation details of the real-time acquisition and network transport components of a fully operational WiVision prototype, and the results of a performance evaluation study on that prototype.

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WiVision:用于实时分发和按需播放的无线视频系统

通过无线网络传送数字视频的能力是许多有用应用的使能技术，范围从家庭娱乐和安全监控到企业消息传递和军事侦察，因此代表了无线技术发展的圣杯。我们描述了一个无线视频传输系统，WiVision，它使用IEEE 802.11无线局域网作为实时视频分发和点播视频播放的最后一英里。WiVision既可以直播校园研讨会和体育活动等活动，也可以向移动用户播放预先存储的视频流，如课程讲座和金融分析会议，用户可以通过笔记本电脑或掌上电脑收听自己选择的频道。WiVision的一个创新功能是支持基于关键字搜索的随机视频访问，其中关键字是从嵌入在电视节目中的封闭字幕文本中提取的。此外，WiVision能够在无线链路上播放视频流，同时与商用媒体播放器无缝合作。本文介绍了全功能WiVision原型的实时采集和网络传输组件的实现细节，以及该原型的性能评估研究结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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First IEEE Consumer Communications and Networking Conference, 2004. CCNC 2004.

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