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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 organising 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.


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