Basic elements of communication

 Explain the basic elements of communication with a neat sketch.

 

The block diagram of a communication system will have five blocks, including the information source, transmitter, channel, receiver and destination blocks.

1.Information source :-

·        The objective of any communication system is to convey information from one point to the other. The information comes from the information source, which originates it

·        Information is a very generic word signifying at the abstract level anything intended for communication, which may include some thoughts, news, feeling, visual scene, and so on.

·        The information source converts this information into physical quantity.

·        The physical manifestation of the information is termed as message signal

2.Transmitter :-

·        The objective of the transmitter block is to collect the incoming message signal and modify it in a suitable fashion (if needed), such that, it can be transmitted via the chosen channel to the receiving point.

·        Channel is a physical medium which connects the transmitter block with the receiver block.

·        The functionality of the transmitter block is mainly decided by the type or nature of the channel chosen for communication.

3.Channel :-

·        Channel is the physical medium which connects the transmitter with that of the receiver.

·        The physical medium includes copper wire, coaxial cable, fibre optic cable, wave guide and free space or atmosphere.

·        The choice of a particular channel depends on the feasibility and also the purpose of the communication system.

4.Receiver:-

·        The receiver block receives the incoming modified version of the message signal from the channel and processes it to recreate the original (non-electrical) form of the message signal.

·        There are a great variety of receivers in communication systems, depending on the processing required to recreate the original message signal and also final presentation of the message to the destination.

5.Destination:-

·        The destination is the final block in the communication system which receives the message signal and processes it to comprehend the information present in it. Usually, humans will be the destination block.