Which one of the following statements about differential pul

M: +1.00/-0.33

Which one of the following statements about differential pulse code modulation (DPCM) is true?

[GATE EC 2017 Set 1]

A The sum of message signal sample with its prediction is quantized

B The message signal sample is directly quantized, and its prediction is not used

C The difference of message signal sample and a random signal is quantized

D The difference of message signal sample with its predictions is quantized