Question

If a uniform quantizer with sinusoidal input signal produces the output SNR of 43.76 dB, determine the number of quantization levels used.

• A. 256
• B. 128
• C. 32
• D. 64

Answer 1

The Correct Option is A

The signal-to-noise ratio (SNR) for a uniform quantizer is given by \[ \text{SNR}_{dB} = 6.02N + 1.76 \] where \( N \) is the number of bits. Substituting the given SNR: \[ 43.76 = 6.02N + 1.76 \implies N \approx 7 \] The number of quantization levels is \[ 2^7 = 128. \]