Question
Download Solution PDFAn audio signal s(t) = 5cos (2000πt) is quantized using 10-bit PCM. What is the signal-to-quantization noise ratio?
This question was previously asked in
UPSC ESE (Prelims) Electronics and Telecommunication Engineering 19 Feb 2023 Official Paper
Answer (Detailed Solution Below)
Option 3 : 1.57 × 106
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Detailed Solution
Download Solution PDFQuantization:
- Quantization is the process of assigning voltage levels to the samples, is called quantization.
- This quantization noise can be decreased by increasing the number of quantization levels, is called signal to quantization noise ratio.
Given that,
\(s(t) = 5cos(200\pi t) \)
number of bits n =10.
\({s}\over{Nq} \)= \({3}\over{2} \)\(\times\)22n
= \({3}\over{2}\)\(\times\)22\(\times\)10
= 1.5 x 220
= 1.57 \(\times\)106
Here, option 3 is correct.
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