Tele Immersion or Tele Presence is a technology, which allows to feel the presence of an individual as the real one. The integration of virtual reality with tele immersion enables the interaction with the individual at the other end.
The cameras are used to capture continuous 3D images and these shots are projected real-time into the computer simulated environment. This is how tele immersion is achieved. Get even more details about tele immersion in the below ppt: