DigCom, PCM

What do you think is digital communication?

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Why is digital communication important?

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Give an example of an input transducer.

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Give an example of an output transducer.

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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.

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