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Advanced free viewpoint video streaming techniques

机译：先进的免费视点视频流技术

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Free-viewpoint video is a new type of interactive multimedia service allowing users to control their viewpoint and generate new views of a dynamic scene from any perspective. The uniquely generated and displayed views are composed from two or more high bitrate camera streams that must be delivered to the users depending on their continuously changing perspective. Due to significant network and computational resource requirements, we proposed scalable viewpoint generation and delivery schemes based on multicast forwarding and distributed approach. Our aim was to find the optimal deployment locations of the distributed viewpoint synthesis processes in the network topology by allowing network nodes to act as proxy servers with caching and viewpoint synthesis functionalities. Moreover, a predictive multicast group management scheme was introduced in order to provide all camera views that may be requested in the near future and prevent the viewpoint synthesizer algorithm from remaining without camera streams. The obtained results showed that even 42 % traffic decrease can be realized using distributed viewpoint synthesis and the probability of viewpoint synthesis starvation can be also significantly reduced in future free viewpoint video services.
机译：自由视点视频是一种新型的交互式多媒体服务，允许用户控制其视点并从任何角度生成动态场景的新视图。唯一生成和显示的视图由两个或多个高比特率相机流组成，必须根据用户不断变化的视角将它们传送给用户。由于大量的网络和计算资源需求，我们提出了基于多播转发和分布式方法的可伸缩视点生成和传递方案。我们的目标是通过允许网络节点充当具有缓存和视点综合功能的代理服务器，来找到网络拓扑中分布式视点综合过程的最佳部署位置。此外，引入了一种预测性多播组管理方案，以便提供可能在不久的将来请求的所有摄像机视图，并防止在没有摄像机流的情况下保留视点合成器算法。获得的结果表明，使用未来的免费视点视频服务，使用分布式视点合成甚至可以实现42％的流量减少，并且还可以大大降低视点合成饥饿的可能性。

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