9. audience sees and hears the
presenter, while the presenter
hears only the audience.
10. Signals can be sent via
satellite, microwave,
fiber optics and coaxial
cable.
11.
12. Video teleconference can be classified into
two broad areas according to the technology
used for transmission:
Full-motion video – uses normal TV
broadcast method or an analog video
channel that requires a wideband channel to
transmit pictures.
13. Compressed video – is compressed by
a piece of technology known as a
Codec, in order to send it down the
narrower bandwidth of a special
telephone line.
15. Is the transmission of still image and
audio signals . With an electronic
blackboard, the image is drawn or
written on a pressure sensitive
surface that converts the writing to
audible telephone tones.
