Explain Differential Pulse Code Modulation (DPCM) with a neat block di

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Module 5: Pulse Modulation-II

20257m

Explain Differential Pulse Code Modulation (DPCM) with a neat block diagram.

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Answer

DPCM block: $x[n]$ →subtract predictor→Quantizer→Encoder→Channel→Decoder→predictor loop. $e[n]=x[n]-\hat{x}[n]$ , $\tilde{x}=\hat{x}+e_q$ . Exploits correlation, fewer bits. See Q45.

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