Question

In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately equal to

• A. 3 times
• B. 4 times
• C. 2 times
• D. 6 times

Hint:

When studying PCM, remember that bandwidth increases with more quantization levels, and the relationship is logarithmic.

Answer 1

The Correct Option is A

In Pulse Code Modulation (PCM), the bandwidth required is proportional to the number of quantization levels. Increasing the number of quantization levels from 4 to 64 (a factor of 16) increases the bandwidth requirement. Typically, the bandwidth required will increase by a factor of the logarithmic base of 2 for the number of quantization levels.