Source encoder: Converts analog signal into binary code
(i) Channel encoder: Generates channel code word from the source code words.
(ii) Modulator: Modulates the channel code words into a continuous wave.
(iii) Low pass filter: Allows only lower frequencies and blocks the other frequencies.
(iv) Synchronisation: Is required to demodulate a carrier modulated wave.
(v) Demodulator: Converts continuous waveform into ordinary signal.
(vi) Channel decoder: Decodes the channel code word.
(vii) Source decoder: Converts channel decoder code word into information signal.
