ITPEC IP October 2019 Question 3
ITPEC IP October 2019 — Question 3 of 100
Figure (b) produces the required five quantized values. Its encoded sequence is 01 00 10 11 01: the amplitude is nearest 01 at time 1, 00 at time 2, 10 at time 3, 11 at time 4, and returns to 01 at time 5.
Answer (b)
Why not others:
- (a) is near 01, 01, 00, 10, 11
- (c) starts near 01 and reaches its low and high levels at different sample times
- (d) does not produce the required 00, 10, and 11 progression at times 2 through 4
Key rule: Read only the amplitude at each marked sampling time, round it to the nearest quantization level, and translate those levels in chronological order.
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