Discussion
Statement I: Quantisation noise can be reduced by using more bits per sample.
Statement II: Quantisation noise can be reduced by regenerating the pulses along the route.
In the light of the above statements, choose the correct answer.
Answer: B
The first is true and the second is not: quantisation noise is created in the coder and carried in the coded values, so a regenerator reproduces it exactly. Regeneration removes only what the channel added. The distinction is worth being firm about, because it explains why coder resolution has to be chosen for the quality wanted at the far end and cannot be improved anywhere along the way.
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