Interactive UHDTV at the Commonwealth Games

Redi, Judith; D'Acunto, Lucia; Niamut, Omar

doi:10.1145/2745197.2745203

Cited by 5 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tile-based spatial video segmentation has been used in several other applications, including to support pan/tilt/zoom interactions during live streaming of high resolution videos [27], for interactive panoramic video [5], interactive 4k video [28], and to allow users to navigate freely through high resolution video feeds while minimizing bandwidth usage [29]. Other prior works have demonstrated interactive tiled streaming of ultra-high resolution videos based on a user's region-ofinterest [30], [31] and crowd-driven prefetch prediction [32].…”

Section: Related Workmentioning

confidence: 99%

Cross-user Similarities in Viewing Behavior for 360$^{\circ}$ Video and Caching Implications

Carlsson,

Eager

2019

Preprint

View full text Add to dashboard Cite

The demand and usage of 360 • video services are expected to increase. However, despite these services being highly bandwidth intensive, not much is known about the potential value that basic bandwidth saving techniques such as server or edgenetwork on-demand caching (e.g., in a CDN) could have when used for delivery of such services. This problem is both important and complicated as client-side solutions have been developed that split the full 360 • view into multiple tiles, and adapt the quality of the downloaded tiles based on the user's expected viewing direction and bandwidth conditions. To better understand the potential bandwidth savings that caching-based techniques may offer for this context, this paper presents the first characterization of the similarities in the viewing directions of users watching the same 360 • video, the overlap in viewports of these users (the area of the full 360 • view they actually see), and the potential cache hit rates for different video categories, network conditions, and accuracy levels in the prediction of future viewing direction when prefetching. The results provide substantial insight into the conditions under which overlap can be considerable and caching effective, and can inform the design of new caching system policies tailored for 360 • video.

show abstract

Section: Related Workmentioning

confidence: 99%

Cross-user Similarities in Viewing Behavior for 360$^{\circ}$ Video and Caching Implications

Carlsson,

Eager

2019

Preprint

View full text Add to dashboard Cite

show abstract

“…This includes delivery of ultra-high resolution videos based on a user's region-of-interest [17,18]. Others have used tile-based spatial segmentation to support pan/tilt/zoom interactions during live streaming [30], for interactive 4k video delivery during the 2014 Commonwealth games [25], and for a coaching/training application [9].…”

Section: Related Workmentioning

confidence: 99%

“…Several prior works have demonstrated interactive tiled streaming of high-resolution videos [9,25,30]. This includes delivery of ultra-high resolution videos based on a user's region-of-interest [17,18].…”

Section: Related Workmentioning

confidence: 99%

Proceedings of the 9th ACM Multimedia Systems Conference

2018

View full text Add to dashboard Cite

With 360°video, only a limited fraction of the full view is displayed at each point in time. This has prompted the design of streaming delivery techniques that allow alternative playback qualities to be delivered for each candidate viewing direction. However, while prefetching based on the user's expected viewing direction is best done close to playback deadlines, large buffers are needed to protect against shortfalls in future available bandwidth. This results in conflicting goals and an important prefetch aggressiveness tradeoff problem regarding how far ahead in time from the current playpoint prefetching should be done. This paper presents the first characterization of this tradeoff. The main contributions include an empirical characterization of head movement behavior based on data from viewing sessions of four different categories of 360°v ideo, an optimization-based comparison of the prefetch aggressiveness tradeoffs seen for these video categories, and a data-driven discussion of further optimizations, which include a novel system design that allows both tradeoff objectives to be targeted simultaneously. By qualitatively and quantitatively analyzing the above tradeoffs, we provide insights into how to best design tomorrow's delivery systems for 360°videos, allowing content providers to reduce bandwidth costs and improve users' playback experiences. CCS CONCEPTS• Information systems → Multimedia streaming; • Networks → Application layer protocols; KEYWORDS 360°streaming, optimized prefetching, view prediction

show abstract

The prefetch aggressiveness tradeoff in 360° video streaming

Almquist

Krishnamoorthi

et al. 2018

Proceedings of the 9th ACM Multimedia Systems Conference

View full text Add to dashboard Cite

Interactive UHDTV at the Commonwealth Games

Cited by 5 publications

References 15 publications

Cross-user Similarities in Viewing Behavior for 360$^{\circ}$ Video and Caching Implications

Cross-user Similarities in Viewing Behavior for 360$^{\circ}$ Video and Caching Implications

Proceedings of the 9th ACM Multimedia Systems Conference

The prefetch aggressiveness tradeoff in 360° video streaming

Contact Info

Product

Resources

About