Question

Without quantization procedure how much of actual information is lost during analog to digital conversion process?? Justify your answer?

Answer 1

first of all quantization is the process of converting continuous amplitude signal to discrete amplitude.

in the process of digitalizing a analog signal, Quantization is a step. Without Quantization there is no conversion of analog to digital.

I can say that in the process of Quantization there is some loss of information while converting from analog to digital. Let's see how.

say I have a signal from t=1 to 10 seconds. now, I do the sampling and keep 1, 2, 4,6, 8 samples. In quantization we assign some amplitude value to the samples we have.

say the amplitude of sample 2 is 3.5. but we use only 3 bits to represent 3(011). so you are losing information which is present in the decimal places.

Another thing here is that, say I have 2 samples x and y and their amplitudes are 3.1 and 3.7 respectively. for both samples we are assigning same 3 bits only which is 011. this leads to loss of information which is present on sample y having 3.7 amplitude.

simply in a sentence, we are not able to assign adequate number of bits to the sample digitally.

Hope it helps.