Client-Driven Selective Streaming of Multiview Video for Interactive 3DTV
Client-Driven Selective Streaming of Multiview Video for Interactive 3DTV
复制标题
DOI：
10.1109/tcsvt.2007.903664
复制
发表时间：
2007-11
影响因子：
8.4
通讯作者：
E. Kurutepe;M. Civanlar;A. Tekalp
中科院分区：
文献类型：
--
作者：
E. Kurutepe;M. Civanlar;A. Tekalp
我们提出了一种新的客户端驱动的多视图视频流系统，允许用户观看3D视频交互式显着降低带宽要求，通过发送少量的视图选择根据他/她的头部位置。用户的头部位置被跟踪并预测到未来，以动态地选择最匹配用户当前视角的视图。需要预测未来的头部位置，使得可以预取与预测的头部位置匹配的视图，以便考虑由于网络传输和流切换而引起的延迟。系统将为选定视图分配更多带宽，以便渲染当前视角。如果当前用户视点不同于预测视点，则还预取一些其它视图的高度压缩的较低质量版本以用于隐藏。一个客观的措施的基础上的头部运动和系统中的延迟的不稳定性，以确定额外的低质量的视图被预取的数量。所提出的系统利用多视图编码（MVC）和可伸缩视频编码（SVC）的概念，以获得更高的压缩效率，同时提供灵活的带宽分配到选定的视图。在不同的实验条件下，所提出的系统的率失真性能的证明。
We present a novel client-driven multiview video streaming system that allows a user to watch 3D video interactively with significantly reduced bandwidth requirements by transmitting a small number of views selected according to his/her head position. The user's head position is tracked and predicted into the future to select the views that best match the user's current viewing angle dynamically. Prediction of future head positions is needed so that views matching the predicted head positions can be prefetched in order to account for delays due to network transport and stream switching. The system allocates more bandwidth to the selected views in order to render the current viewing angle. Highly compressed, lower quality versions of some other views are also prefetched for concealment if the current user viewpoint differs from the predicted viewpoint. An objective measure based on the abruptness of the head movements and delays in the system is introduced to determine the number of additional lower quality views to be prefetched. The proposed system makes use of multiview coding (MVC) and scalable video coding (SVC) concepts together to obtain improved compression efficiency while providing flexibility in bandwidth allocation to the selected views. Rate-distortion performance of the proposed system is demonstrated under different experimental conditions.