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Basic versions of the technique are referred to as asynchronous reprojection by Google and Valve, [1] [4] while Oculus has two implementations, called asynchronous timewarp [2] and asynchronous spacewarp. Asynchronous timewarp uses the headset's rotational data to extrapolate a new rendered frame based on the last frame it received.
Oculus Mobile SDK, developed by Oculus VR for its own standalone headsets and the Samsung Gear VR. (The SDK has been deprecated in favor of OpenXR, released in July 2021.) [ 1 ] Tethered – headsets that act as a display device to another device, like a PC or a video game console , to provide a virtual reality experience.
A virtual reality headset (or VR headset) is a head-mounted device that uses 3D near-eye displays and positional tracking to provide a virtual reality environment for the user. VR headsets are widely used with VR video games , but they are also used in other applications, including simulators and trainers.
This can also happen if the VR system does not have a high enough frame rate, or if there is a lag between the body's movement and the onscreen visual reaction to it. [170] Because approximately 25–40% of people experience some kind of VR sickness when using VR machines, companies are actively looking for ways to reduce VR sickness. [171]
Technology bottlenecks had been from two major components of VR systems. One area was the rendering speed of computer hardware to update the 3D displays at a fast-enough frame rate. Frame rates of 20 Hz or less appear to most users as a series of separate images rather than continuous video stream, which breaks immersion. [45]
The Valve Index is a consumer virtual reality headset created and manufactured by Valve. Announced on April 30, 2019, the headset was released on June 28 of the same year. [6] [7] The Index is a second-generation headset and the first to be fully manufactured by Valve. Half-Life: Alyx is bundled with the headset.
It has a removable battery pack on its rear strap, which is hot-swappable; the headset contains a limited battery backup. [54] The headset can be used with a traditional headstrap, or with a glasses frame similar to the Vive Flow (used with an external power supply). [54] [53] Eye tracking and face tracking accessories are also available. [54]
Frame rate up-conversion (FRC) is the process of increasing the temporal resolution of a video sequence by synthesizing one or more intermediate frames between two consecutive frames. A low frame rate causes aliasing, yields abrupt motion artifacts, and degrades the video quality. Consequently, the temporal resolution is an important factor ...