Abstract :
Telepresence refers to a set of
technologies which allow a person to feel as if they were present, to give the
appearance that they were present, or to have an effect, at a location other
than their true location.Telepresence requires that the senses of the user, or
users, are provided with such stimuli as to give the feeling of being in that
other location. Additionally, the user(s) may be given the ability to affect
the remote location. In this case, the user's position, movements, actions,
voice, etc. may be sensed, transmitted and duplicated in the remote location o
bring about this effect. Therefore information may be travelling in both
directions between the user and the remote location.
TelePresence is a new technology that
creates unique, "in-person" experiences between people, places, and
events in their work and personal lives. It combines innovative video, audio,
and interactive elements (both hardware and software) to create this experience
over the network. Telepresence means "feeling like you are somewhere
else". Some people have a very technical interpretation of this, where
they insist that you must have head- mounted displays in order to have
telepresence. Other people have a task-specific meaning, where
"presence" requires feeling that you are emotionally and socially
connected with the remote world. It's all a little vague at this time.
VISION
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
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 small displays mounted directly in front of the eyes. The latter
provides a particularly convincing 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.
SOUND
Sound is generally the easiest
sensation to implement with high fidelity, with the
telephone dating back more than 100
years, and very high-fidelity sound equipment readily available as consumer
gear. Stereophonic sound is more convincing than monoaural sound, and surround
sound is better still.
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