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arXiv 1609.04196cs.MM
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交互式多视点视频系统中自适应流媒体的优化表示

Optimal Representations for Adaptive Streaming in Interactive Multi-View Video Systems

Laura Toni, Pascal Frossard

摘要:

交互式多视图视频流(IMVS)服务允许远程沉浸在3D场景中。这可以通过发送一组参考相机视图(锚视图)来实现,客户端使用这些参考相机视图在场景中自由导航,并可能合成感兴趣的其他视点。从网络的角度来看,IMVS系统的最大挑战是向每个客户端提供最佳的锚视图集,最大限度地提高导航质量,最大限度地减少视图切换延迟,同时满足网络约束。在自由视点系统中集成自适应流媒体解决方案提供了一个有前途的解决方案,部署IMVS在大型和异构的情况下,只要服务器上的多视图视频表示被正确选择。因此,我们建议通过最小化整体资源需求来优化服务器上的多视图数据,同时为不同的用户提供良好的导航质量。我们提出了一个多视图自适应流媒体系统的视频表示集优化,我们表明,它是NP-难的。因此,我们引入了多视图导航段的概念,允许铸造的视频表示集的选择作为一个整数线性规划问题与有限的计算复杂性。然后,我们表明,所提出的解决方案降低了计算复杂性,同时保持最优的3D场景。然后,我们为不同类别的用户提供模拟结果,并显示与推荐的表示集(例如,Netflix和Apple的那些)或基线表示选择算法,其中编码参数是针对所有视图先验决定的。

英文摘要:

Interactive multi-view video streaming (IMVS) services permit to remotely immerse within a 3D scene. This is possible by transmitting a set of reference camera views (anchor views), which are used by the clients to freely navigate in the scene and possibly synthesize additional viewpoints of interest. From a networking perspective, the big challenge in IMVS systems is to deliver to each client the best set of anchor views that maximizes the navigation quality, minimizes the view-switching delay and yet satisfies the network constraints. Integrating adaptive streaming solutions in free-viewpoint systems offers a promising solution to deploy IMVS in large and heterogeneous scenarios, as long as the multi-view video representations on the server are properly selected. We therefore propose to optimize the multi-view data at the server by minimizing the overall resource requirements, yet offering a good navigation quality to the different users. We propose a video representation set optimization for multiview adaptive streaming systems and we show that it is NP-hard. We therefore introduce the concept of multi-view navigation segment that permits to cast the video representation set selection as an integer linear programming problem with a bounded computational complexity. We then show that the proposed solution reduces the computational complexity while preserving optimality in most of the 3D scenes. We then provide simulation results for different classes of users and show the gain offered by an optimal multi-view video representation selection compared to recommended representation sets (e.g., Netflix and Apple ones) or to a baseline representation selection algorithm where the encoding parameters are decided a priori for all the views.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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