In delta modulation, slope-overload distortion can be reduced by

decreasing the step size
decreasing the granular noise
decreasing the sampling rate
increasing the step size

Correct answer: increasing the step size

Solution

Slope-overload distortion occurs when the step size is too small to follow the input slope. Increasing the step size improves tracking and reduces this distortion. However, too large a step may increase granular noise.

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