Question

In PCM the samples are dependent on ____ .

• A. Time
• B. Frequency
• C. Quantization level
• D. Interval between quantization level

Hint:

PCM Process. (1) Sampling: Measure analog signal amplitude at discrete points in time. (2) Quantization: Map sample amplitude to discrete levels. (3) Encoding: Represent discrete levels with binary codes. Samples are fundamentally taken at specific times.

Answer 1

The Correct Option is A

Pulse Code Modulation (PCM) is a method of converting an analog signal into a digital signal
The first step in this process is sampling
Sampling involves taking discrete measurements (samples) of the analog signal's amplitude at regular intervals in time
The value of each sample represents the amplitude of the analog signal at that specific instant
Therefore, the samples in PCM are inherently dependent on the time at which they are taken
Quantization levels are used to represent the *amplitude* of these time-dependent samples digitally
Frequency is related to the rate of change of the signal over time