Video Conferencing - R.D.Sivakumar

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