A Paradigm for Dynamic Adaptive Streaming over HTTP for Multi-view Video
A Paradigm for Dynamic Adaptive Streaming over HTTP for Multi-view Video
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DOI：
10.1007/978-3-319-24078-7_41
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发表时间：
2015-09
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影响因子：
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通讯作者：
Jimin Xiao;M. Hannuksela;T. Tillo;M. Gabbouj
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文献类型：
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作者：
Jimin Xiao;M. Hannuksela;T. Tillo;M. Gabbouj
近年来，基于http的视频点播（VoD）传输越来越受欢迎。通过最近提出的基于HTTP的动态自适应流（DASH），视频客户端可以动态地调整所请求的视频质量和比特率，以匹配当前的下载速率。为了避免回放中断，DASH客户端试图将缓冲区占用保持在一定的最小水平以上。这种机制适用于单视图视频流。对于DASH上的多视图视频流应用，用户产生视图切换，DASH客户端在给定时间内只播放多视图内容的一个视图。在这种应用中，如何在视图切换过程中充分利用缓存的视频数据是一个有待解决的问题。在本文中，我们提出了两种快速有效的视图切换方法，在DASH系统的范例中，充分利用已经缓冲的视频数据。所提出的方法的优点是双重的。一是视图切换延迟短。第二个优点是，在视图切换期间的率失真性能将很高，即使用较少的请求数据来实现相当的视频播放质量。实验结果证明了该方法的有效性。
HTTP-based delivery for Video on Demand (VoD) has been gaining popularity within recent years. With the recently proposed Dynamic Adaptive Streaming over HTTP (DASH), video clients may dynamically adapt the requested video quality and bitrate to match their current download rate. To avoid playback interruption, DASH clients attempt to keep the buffer occupancy above a certain minimum level. This mechanism works well for the single view video streaming. For multi-view video streaming application over DASH, the user originates view switching and that only one view of multi-view content is played by a DASH client at a given time. For such applications, it is an open problem how to exploit the buffered video data during the view switching process. In this paper, we propose two fast and efficient view switching approaches in the paradigm of DASH systems, which fully exploit the already buffered video data. The advantages of the proposed approaches are twofold. One is that the view switching delay will be short. The second advantage is that the rate-distortion performance during the view switching period will be high, i.e., using less request data to achieve comparable video playback quality. The experimental results demonstrate the effectiveness of the proposed method.