DigCom, PCM

What do you think is digital communication?

Why is digital communication important?

Give an example of an input transducer.

Give an example of an output transducer.

Which of the following is not one of the elements of digital communication?

• Source Encoder

• Output Transducer

• Digital Modulator

• Medium

• None of the above

The received signal is converted again from analog to digital or it gets reconstructed here. This is the first element at the receiver end.

• Source Encoder

• Output Transducer

• Digital Demodulator

• Channel Decoder

This element does some error corrections. The distortions which might occur during the transmission, are corrected by adding some redundant bits.

• Source Decoder

• Channel Decoder

• Input Transducer

• Output Transducer

It recreates the source output. The resultant signal is once again digitized by sampling and quantizing.

• Source Decoder

• Channel Decoder

• Input Transducer

• Output Transducer

It compresses the data into minimum number of bits for the effective utilization of the bandwidth.

• Digital Modulator

• Input Transducer

• Source Encoder

• Information Source

Give an example of a medium or channel.