Content-aware streaming of lecture videos over wireless networks
Content-aware streaming of lecture videos over wireless networks
复制标题
通过无线网络进行内容感知的讲座视频流传输
DOI：
10.1109/mmse.2004.38
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Chekuri Choudary
中科院分区：
文献类型：
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作者：
Tiecheng Liu;Chekuri Choudary
无线网络上的视频流在各种应用中变得越来越重要。为了适应无线网络的动态变化，需要提供服务质量（QoS）可扩展的视频流。本文提出了一种用于电子学习应用的内容感知无线讲座（教学）视频流系统。首先提供了一种实时分析教学视频的方法来检测视频内容区域并对视频帧进行分类，然后应用“泄漏视频缓冲区”模型来动态压缩视频流。在我们的内容感知视频流中，检测教学视频内容并为不同类型的视频内容选择不同的QoS。我们的自适应反馈控制方案不仅能够基于无线网络带宽，而且还基于视频内容和视频客户端的反馈，将正确压缩的视频流传输到视频客户端。最后，我们演示了可扩展性和内容感知我们的系统并显示两个讲座视频的实验结果。
Video streaming over wireless networks becomes increasingly important in a variety of applications. To accommodate the dynamic change of wireless networks, quality of service (QoS) scalable video streams need to be provided. This paper presents a system of content-aware wireless streaming of lecture (instructional) videos for e-learning applications. A method for real-time analysis of instructional videos is first provided to detect video content regions and classify video frames, then a 'leaking video buffer" model is applied to dynamically compress video streams. In our content-aware video streaming, instructional video content is detected and different QoS are selected for different types of video content. Our adaptive feedback control scheme is able to transmit properly compressed video streams to video clients not only based on wireless network bandwidth, but also based on video content and the feedback of video clients. Finally, we demonstrate the scalability and content awareness of our system and show experimental results of two lecture videos.