Robust wireless delivery of scalable videos using inter-layer network coding
Robust wireless delivery of scalable videos using inter-layer network coding
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DOI：
10.1109/wcnc.2015.7127807
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发表时间：
2015-03
期刊：
影响因子：
--
通讯作者：
Pouya Ostovari;Jie Wu
中科院分区：
文献类型：
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作者：
Pouya Ostovari;Jie Wu
随着无线设备(如智能手机和平板电脑)和通过互联网观看视频的普及，通过无线链路向用户提供高质量的视频正成为一种重要的应用。在无线网络中向多个接收者进行组播的主要挑战之一是接收者的多样性。在无线网络中，用户具有不同的无线信道条件，因此，他们体验到不同的分组递送速率。为了处理这些不同的频道，多分辨率视频被用来提供多个质量级别的视频。最近对多分辨率编码的研究表明，三角网络编码可以提高用户接收视频的质量。考虑到视频不同时间层和空间(分辨率)层之间的依赖关系，提出了一种新的在时间层和空间层之间进行网络编码的二维三角网络编码。仿真结果表明，与以往的一维网络编码方案相比，本文提出的二维编码方案具有更好的性能。
As the popularity of wireless devices (e.g. smart-phones and tablets) and watching videos over the Internet is increasing rapidly, delivering high quality videos to users over wireless links is becoming an important application. One of the main challenges of multicasting in wireless networks to multiple receivers is the diversity of the receivers. In a wireless network, the users have different wireless channel conditions, and as a result, they experience different packet delivery rates. In order to handle these heterogeneous channels, multi-resolution videos are used to deliver videos at multiple quality levels. The recent research on multi-resolution codes show that triangular network coding can increase the quality of the received videos by the users. In this paper, considering the dependencies among different temporal and spatio (resolution) layers of a video, we propose a new two-dimensional triangular network coding that performs network coding between the temporal and spatio layers. Our simulation results show the effectiveness of our two-dimensional coding schemes compared to the previous one-dimensional network coding schemes.