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| Content Provider | ACM Digital Library |
|---|---|
| Author | Boos, Kevin Chu, David Cuervo, Eduardo |
| Abstract | Virtual Reality Head-Mounted Displays (HMDs) are attracting users with the promise of full sensory immersion in virtual environments. Creating the illusion of immersion for a near-eye display results in very heavy rendering workloads: low latency, high framerate, and high visual quality are all needed. Tethered VR setups in which the HMD is bound to a powerful gaming desktop limit mobility and exploration, and are difficult to deploy widely. Products such as Google Cardboard and Samsung GearVR purport to offer any user a mobile VR experience, but their GPUs are power-constrained and therefore fail to produce acceptable frame rate and latency for even scenes of modest visual quality. We present FLASHBACK, a system that overcomes the limitations of both Tethered and Mobile-Rendered HMDs to offer a full-quality VR experience on weak mobile devices. FlashBack does so by serving all of a VR application's high data rate rendering requests from a local cache of pre-rendered HD frames, effectively memoizing prior rendering efforts. Pre-caching avoids the struggle of real-time rendering on a weak mobile GPU while leveraging a prevailing trend among mobile devices: storage is low-power and increasingly abundant, cheap, and often underutilized, while graphical processing remains restricted due to thermal and energy constraints. In addition to handling a static background scene, FlashBack even supports dynamically-moving, animated objects. FlashBack achieves up to a 15x reduction in end-to-end latency, an 8x increase in overall framerate, and a 97x reduction in per-frame energy consumption compared with a local rendering of a desktop-quality VR application on a weak mobile device. |
| Starting Page | 94 |
| Ending Page | 94 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781450344166 |
| DOI | 10.1145/2938559.2938583 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2016-06-25 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Flashback Hmds |
| Content Type | Text |
| Resource Type | Article |
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