Journal article Open Access

Quality of Experience for 3-D Immersive Media Streaming

Doumanoglou, Alexandros; Griffin, David; Serrano, Javier; Zioulis, Nikolaos; Phan, Truong Khoa; Jiménez, David; Zarpalas, Dimitrios; Alvarez, Federico; Rio, Miguel; Daras, Petros


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    <dct:title>Quality of Experience for 3-D Immersive Media Streaming</dct:title>
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    <dcat:keyword>Quality of experience (QoE)</dcat:keyword>
    <dcat:keyword>virtual reality (VR)</dcat:keyword>
    <dcat:keyword>immersive media</dcat:keyword>
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    <dcat:keyword>tele-immersion (TI)</dcat:keyword>
    <dcat:keyword>real-time 3D reconstruction</dcat:keyword>
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    <dct:description>&lt;p&gt;Recent advances in media capture and processing technologies have enabled new forms of true 3-D media content that increase the degree of user immersion. The demand for more engaging forms of entertainment means that content distributors and broadcasters need to fine-tune their delivery mechanisms over the Internet as well as develop new models for quantifying and predicting user experience of these new forms of content. In the work described in this paper, we undertake one of the first studies into the quality of experience (QoE) of real-time 3-D media content streamed to virtual reality (VR) headsets for entertainment purposes, in the context of game spectating. Our focus is on tele-immersive media that embed real users within virtual environments of interactive games. A key feature of engaging and realistic experiences in full 3-D media environments, is allowing users unrestricted viewpoints. However, this comes at the cost of increased network bandwidth and the need of limiting network effects in order to transmit a realistic, realtime representation of the participants. The visual quality of 3-D media is affected by geometry and texture parameters while the temporal aspects of smooth movement and synchronization are affected by lag introduced by network transmission effects. In this paper, we investigate varying network conditions for a set of tele-immersive media sessions produced in a range of visual quality levels. Further, we investigate user navigation issues that inhibit free viewpoint VR spectating of live 3-D media. After reporting on a study with multiple users we analyze the results and assess the overall QoE with respect to a range of visual quality and latency parameters. We propose a neural network QoE prediction model for 3-D media, constructed from a combination of visual and network parameters.&lt;/p&gt;</dct:description>
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