Abstract-Virtual reality (VR) applications target high-quality and zero-latency scene navigation to provide users with a fullimmersion 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 clientside (i.e., adaptation logic), which is able to optimize the rate at which each tile is downloaded. First, we introduce the viewportquality 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.
For instance, Toni et al. REF proposed a tile-based adaptive streaming strategy to determine the rate at which each tile is downloaded for maximizing the quality experienced, where the tile set required by the user is given.
Navigation-aware adaptive streaming strategies for omnidirectional video
2017 IEEE 19th International Workshop on Multimedia Signal Processing (MMSP)
2017 IEEE 19th International Workshop on Multimedia Signal Processing (MMSP)
Computer Science