Video conferencing allows two or more locations to interact simultaneously through two-way video and audio transmission. It utilizes digital compression of audio and video streams in real time along with hardware or software codecs. There are two main types of video conferencing systems - dedicated systems that package all components into one unit, and desktop systems that are add-ons to transform PCs into conferencing devices. Video conferencing provides educational benefits such as allowing students and teachers anywhere to participate in classes, enabling virtual field trips, and helping small schools offer more courses.

1. Video Conference
R.D.SIVAKUMAR,M.Sc.,M.Phil.,M.Tech.,
Assistant Professor of Computer Science &
Assistant Professor and Head, Department of M.Com.(CA),
Ayya Nadar Janaki Ammal College,
Sivakasi – 626 124.
Mobile: 099440-42243
e-mail : sivamsccsit@gmail.com
website: www.rdsivakumar.blogspot.in

2. A video conference is a set of interactive
telecommunication technologies which allow two or
more locations to interact via two-way video and
audio transmissions simultaneously.
Video Conference

3. • It has also been called ‘visual collaboration’ and is
type of groupware.
• Videoconferencing differs from videophone calls in
that it’s designed to serve a conference rather than
individuals.
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4. • It is an intermediate form of video telephony, first
deployed commercially by AT&T during the early
1970s using their Picture Phone technology.
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5. • An older Polycom VSX 7000 system and camera
used for videoconferencing, with two displays for
simultaneous broadcast from separate locations.
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6. • The core technology used in a videoconferencing
system is digital compression of audio and video
streams in real time.
• The hardware or software that performs compression
is called a codec (coder/decoder).
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7. • The use of audio modems in transmission line allow
for the use of POTS, or the Plain Old Telephone
System, in some low-speed applications, such as
video telephony, because they convert the digital
pulses to/from analog waves in the audio spectrum
range.
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8. The other components required for a videoconferencing
system include:
• Video input: Video camera or webcam
• Video output: computer monitor, television or LCD
projector.
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9. • Audio input: microphones, CD/DVD player, cassette
player, or any other source of PreAmp audio outlet.
• Audio output: usually loudspeakers associated with
the display device or telephone
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10. Data transfer: analog or digital telephone network,
LAN or Internet
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11. There are basically two kinds of videoconferencing
systems:
Dedicated systems:
They have all required components
packaged into a single piece of equipment,
usually a console with a high quality remote
controlled video camera.
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12. Desktop systems:
They are add-ons (hardware boards,
usually) to normal PCS, transforming them
into videoconferencing devices.
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13. Impact on education
• Videoconferencing provides students with the
opportunity to learn by participating in a 2-way
communication platform.

14. • Furthermore, teachers and lectures from all over the
world can be brought to classes in remote or
otherwise isolated places.
Impact on education

15. • Students from diverse communities and backgrounds
can come together to learn about one another.
• Students are able to explore, communicate, analyze
and share information and ideas with one another.
Impact on education

16. • Through videoconferencing students can visit another
part of the world to speak with others, visit a zoo, a
museum and so on, to learn.
Impact on education

17. • These “virtual field trips” can bring opportunities to
children, especially those in geographically isolated
locations, or the economically disadvantaged.
Impact on education

18. • Small schools can use this technology to pool
resources and teach courses (such as foreign
languages) which could not otherwise be offered.
Impact on education

19. Here are a few examples of how videoconferencing can
benefit people around campus:
• Faculty member keeps in touch with class while away
for a week at a conference
• Guest lecturer brought into a class from another
institution
Impact on education

20. • Researcher collaborates with colleagues at other
institutions on a regular basis without loss time due to
travel.
• Schools with multiple campuses can collaborate and
share professors
Impact on education

21. • Faculty member participates in a thesis defense at
another institution
• Administrators on tight schedules collaborate on a
budget preparation from different parts of campus
Impact on education

22. • Faculty committee auditions a scholarship candidate
• Researcher answers questions about a grant proposal
from an agency or review committee
• Student interviews with an employer in another city
• Tele-seminars
Impact on education