ITPEC IP October 2023 Question 3
ITPEC IP October 2023 — Question 3 of 100
Increasing the encoding depth from 8 bits to 16 bits lets each sampled amplitude be represented more finely. Eight bits provide 2^8 = 256 quantization levels, while 16 bits provide 2^16 = 65,536 levels. The smaller quantization steps reduce quantization error and improve dynamic resolution.
Answer (a)
Why not others:
- (b) at the same sampling rate and duration, twice as many bits per sample approximately doubles uncompressed data size
- (c) processing more data does not inherently reduce CPU load
- (d) the highest recordable frequency depends on the sampling frequency, which is unchanged
Key rule: Bit depth controls amplitude resolution; sampling frequency controls time resolution and the highest reproducible frequency.
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