Editing Telepresence (section)

==== Vision and sound ====

A minimum system usually includes visual [[feedback]]. Ideally, the entire [[field of view]] of the user is filled with a view of the remote location, and the viewpoint corresponds to the movement and orientation of the user's head. In this way, it differs from [[television]] or [[film|cinema]], where the viewpoint is out of the control of the viewer.

In order to achieve this, the user may be provided with either a very large (or wraparound) screen, or [[Stereoscopic|small displays]] mounted directly in front of the eyes. The latter provides a particularly convincing [[Three-dimensional space|3D]] sensation. The movements of the user's head must be sensed, and the [[camera]] must mimic those movements accurately and in real time. This is important to prevent unintended motion sickness.

Another source of future improvement to telepresence displays, compared by some to [[hologram]]s, is a projected [[Electronic visual display|display technology]] featuring life-sized imagery.<ref name="NS-20091221">{{cite news
  | url=https://www.newscientist.com/article/dn18169-holographic-videoconferencing-moves-nearer-to-market.html
  | title='Holographic' Videoconferencing Moves Nearer to Market
  | last=Barras
  | first=Colin
  | date=26 November 2009
  | work=New Scientist
  | pages=23
  | access-date=14 December 2009}}</ref>

Sound is generally the easiest sensation to implement with high [[fidelity]],  based on the foundational [[telephone]] technology dating back more than 130 years. Very high-fidelity sound equipment has also been available for a considerable period of time, with [[Stereo|stereophonic sound]] being more convincing than [[monaural]] sound.