Page 115 - Viva ICSE Computer Studies 6 : E-book

Video Conferencing

Video conferencing has completely changed
the atmosphere of a modern offi ce. With video
conferencing systems, the participants not
only hear the voice but also see each other.
The communication takes place either in one-
way or multi-way modes. In one-way mode,
which is also known as point-to-point video
conferencing, one of the locations sends the
information and others receive it. In multi-way
mode, which is also known as multi-point video conferencing, two or more locations can send
or receive the information simultaneously.

The process of video conferencing involves some basic steps which are as follows.
• During video conferencing, a video camera installed in the sending device continuously
captures pictures of the person, which are then converted into compressed digital video
signals.

• The compressed digital video signals are sent through a transmission medium to the
receiving devices, which are a part of the video conferencing system.
• The process is reversed and the video signals are decompressed at the receiver’s end.
• The decompressed video signals are continuously displayed as pictures on output device
(such as monitor).

Web Publishing

Web publishing (electronic publishing) is a new
approach of publishing on the Internet, which
is replacing paper books with electronic books.

Social Networking

Social networking is the most common
and popular tool of the Internet. It enables
people to stay connected with their friends,
relatives, family members, acquaintances,
business associates, celebrities or anyone in
the world online by exchanging messages and
information in any form of media. Facebook and
Twitter are the most popular social networking
sites commonly used by people.

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