Question

Distortion produced by quantization is directly proportion to ________ and inversely proportional to ______

(a) Number of levels, step size

(b) Amplitude of the signal, step size

(c) Square of step size, number of levels

(d) Amplitude of the signal, number of levels

I had been asked this question by my college professor while I was bunking the class.

I would like to ask this question from Quantization Techniques topic in section Speech Coding of Wireless/Mobile

Answer 1

The correct choice is (c) Square of step size, number of levels

Easiest explanation: The distortion introduced by any quantization operation is directly proportional to the square of the step size. It is inversely proportional to the number of levels for a given amplitude range.