Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Rate Adaptation Algorithm for Tile-based 360-degree Video Streaming   In the 360-degree immersive video, a user only views a part of the entire raw
video frame based on her viewing direction. However, today's 360-degree video
players always fetch the entire panoramic view regardless of users' head
movement, leading to significant bandwidth waste that can be potentially
avoided. In this paper, we propose a novel adaptive streaming scheme for
360-degree videos. The basic idea is to fetch the invisible portion of a video
at the lowest quality based on users' head movement prediction and to
adaptively decide the video playback quality for the visible portion based on
bandwidth prediction. Doing both in a robust manner requires overcome a series
of challenges, such as jointly considering the spatial and temporal domains,
tolerating prediction errors, and achieving low complexity. To overcome these
challenges, we first define quality of experience (QoE) metrics for adaptive
360-degree video streaming. We then formulate an optimization problem and solve
it at a low complexity. The algorithm strategically leverages both future
bandwidth and the distribution of users' head positions to determine the
quality level of each tile (i.e., a sub-area of a raw frame). We further
provide theoretical proof showing that our algorithm achieves optimality under
practical assumptions. Numerical results show that our proposed algorithms
significantly boost the user QoE by at least 20\% compared to baseline
algorithms.

2
The categories of this paper are: math
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org