Eye-to-eye contact between the teacher and the distributed
students is a critical factor for ob-taining successful distance
training through visual communication tools. It is only possible
to obtain that by having knowledge about:
- Proper mechanisms for distributing the PC screen either as a video
signal or as a parallel data stream in real time. It should be noticed
that proper solutions must handle communication through firewalls.
- Selecting the proper size and location of the monitors, as well as
selection of proper presentation surface areas in the rooms.
- How to distribute monitors, digital blackboards and camera(s) in a
flexible way and at the same time in such a way that it is adapted to
the size of the room, e.g. how to handle groups of 3-5 persons, as well
as groups in the range of 10-15 persons. Special attention must be given
to larger groups.
- Microphones, camera tracking, strengthening of the sound, etc. are
critical com-ponents that, if done wrong, will stress the teacher and
the students when they communicate, yielding a non natural collaboration
- Digital blackboards are produced with various surface layers, whereby
it is very important to select digital blackboards that use video projectors
explicitly adapted to the selected surface of the blackboard.
- The main principles for designing and localisation of the steering
system is very important as it might reduce the threshold for using
the system considerably by various teachers, i.e. teachers that are
not very interested into the technology.