Page 32 - CA 165 ver 1.0 Class 10
P. 32
Notes
Chatting can be done with people on the Internet whose IDs are added in the friends list or with
someone who invites for chatting on the screen. The same can be done by entering into the ‘Chat
Rooms’, for which one has to select a chat room, then select an ID of a person who is online.
Video Conferencing
Video conferencing is a way of communication in which two or
more people residing at remote places can interact with each
other as if they are in a face-to-face conversation. It is similar
to web chatting. It provides real time visual communication,
unlike other communication methods such as e-mail.
It uses communication in the form of audio and video to
bring people of different places together at one platform for
a meeting or discussion in real time.
A video conference can be established between two persons (referred as ‘point-to-point’) or can involve
more than two people (referred as ‘multipoint’). The video conferencing terminals are often referred as
‘Endpoints’.
Video conferencing also helps in organizing a group conference of many people at a time who may be
placed at different locations of the world. The following five elements are required for video conferencing:
Video Input: Video Camera, Web Cam, Mobile Camera.
Video Output: Computer Monitor, Television or Projector Screen.
Audio Input: Microphone, Mic.
Audio Output: Speakers or Earphone associated with the display devices or telephone line.
Network: (Data Transfer) Analog or Digital Telephone Network, LAN or Internet.
How does video transmission take place?
A web camera captures the video or picture and microphone carries/transmits the voice. The video and
sound files are converted into compressed digital signals via modem.
These converted digital signals are transmitted through the Internet at the other end where it is converted
back into the picture and then it is projected on the screen and the voice is heard through the earphone,
speakers, etc.
e-Learning
It refers to the application of Internet media in the field
of education and learning. Giving tutorials, multimedia
demonstrations, imparting lectures, clarification of doubts,
providing solutions to problems, sharing knowledge through
video conferencing, etc. helps the users to learn about things
with a wide spectrum. Such type of application of IT resources
for learning or studying is known as e-learning i.e., Internet
Based Learning.
30 Touchpad Computer Applications-X

