
Abstract
Virtual reality (VR) applications target high-quality and zero-latency scene navigation to provide users with a full- immersion sensation within a scene. From a network perspective, this requires transmission of the omnidirectional content in its entirety, at a high resolution, which is not always feasible in bandwidth-limited networks. In this work, we propose an optimal transmission strategy for virtual reality applications able to fulfill the bandwidth requirements, while optimizing the end-user quality experienced in the navigation. In further detail, we consider a tile-based coded content for adaptive streaming systems, and we propose a navigation-aware transmission strategy at the client- side (i.e., adaptation logic), which is able to optimize the rate at which each tile is downloaded. First, we introduce the viewport- quality as metric that reflects the quality of any portion of the sphere displayed by the end-user. Then, we cast the tile-rate optimization as an integer linear programming problem and show that the proposed solution achieves substantial quality gains when compared to state-of-the-art adaptation logic methods.
System model at client side
Proposed solution of streaming at variable quality based on client navigation within the content.
Authors
Presentations
- Slides presented during MMSP 2017 – IEEE 19th International Workshop on Multimedia Signal Processing in Luton (London).
Citation
Please cite our paper in your publications if it helps your research:
@inproceedings{rossi2017navigation, title={Navigation-aware adaptive streaming strategies for omnidirectional video}, author={Rossi, Silvia and Toni, Laura}, booktitle={2017 IEEE 19th International Workshop on Multimedia Signal Processing (MMSP)}, year={2017}, organization={IEEE} }
Acknowledgement
This work has been partially funded by the EPSRC Institutional Sponsorship funding OISTER no 536085.