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Panoramic streaming enables users to interactively navigate through high-spatial resolution videos and create an immersive and personalized user experience. Since transmission of high-resolution videos in desirable quality is not feasible given the limited throughput of access and home network links, our work is based on tile-based streaming, where only a spatial subset of the video is transmitted...
360° video streaming to clients using Virtual Reality head mounted displays is a challenge for traditional video delivery. As transmission of the complete content in a desirable quality sacrifices a large fraction of available client and network resources, adaptivity to the user viewport promises substantial benefits. An efficient way to achieve viewport adaptive streaming without per-user or per-orientation...
360° Video services with resolutions of UHD and beyond for Virtual Reality head mounted displays are a challenging task due to limits of video decoders in constrained end devices. Adaptivity to the current user viewport is a promising approach but incurs significant encoding overhead when encoding per user or set of viewports. A more efficient way to achieve viewport adaptive streaming is to facilitate...
This work presents algorithms to resample and filter point cloud data reconstructed from multiple cameras and multiple time instants. In an initial resampling stage, a voxel or a surface mesh based approach resamples the point cloud data into a common sampling grid. Subsequently, the resampled data undergoes a filtering stage based on clustering to remove artifacts and achieve spatiotemporal consistency...
This paper presents an overview of ongoing efforts for creation and delivery of next generation IP television and Video on Demand services. The successful cloud computing paradigm and recent advances in video coding standards are ready to be applied to widely established media services and promise enhanced user experience and reduced cost for operators at the same time. This paper brings together...
Efficient transport schemes for panoramic video delivery were proposed and demonstrated within the past decade. With the recent advances of head mounted displays however, consumers may soon have immersive and sufficiently convenient end devices at reach which could lead to an increasing demand for stereoscopic panoramic video experiences. This paper extents recent compressed domain techniques for...
Video compositing such as blending of user interfaces or advertisements on top of video content is used in many applications. Compositing is usually carried out in the pixel domain either after decoding on the end device or based on transcoding before or during transport, e.g. on cloud resources. This paper proposes a novel method to create a composition of several coded input videos in the compressed...
Even though the sampling grid of a digital camera is uniform and rectangular, the depth information reconstructed from multi-camera samples is neither uniform nor rectangular due to the rotations and translations of the camera coordinate systems with respect to each other. In order to facilitate further processing, e.g. compression of multi camera depth data, resampling of non-uniform multi-camera...
Video transmission over error prone channels as present in most of today’s communication channels, such as Mobile TV or some IPTV systems, is constantly subject to research. Simulation is an important instrument to evaluate performance of the overall video transmission system, but the multitude of parameters often requires large and time-consuming simulation sets. In this paper, we present a packet...
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