Uniform and Non Uniform Quantization

Digital Communications Systems

This set of Digital Communication Questions & Answers for freshers focuses on “Uniform and Non Uniform Quantization”.

1. The size of the quantile interval is called as
a) Inter level
b) Step size
c) Quantile size
d) Level width

2. Uniform quantization provides better quantization for
a) Weak signals
b) Strong signals
c) Weak & Strong signals
d) None of the mentioned

3. Non uniform quantization provides better quantization for
a) Weak signals
b) Coarse signals
c) Weak & Coarse signals
d) None of the mentioned

4. In non uniform quantization, the quantization noise is _______ to signal size.
a) Inversely proportional
b) Directly proportional
c) Equal
d) Double

5. The output SNR can be made independent of input signal level by using
a) Uniform quantizer
b) Non uniform quantizer
c) Uniform & Non uniform quantizer
d) None of the mentioned

6. Companding is the process of
a) Compression
b) Expansion
c) Compression & Expansion
d) None of the mentioned

7. Which value of μ corresponds to linear amplification?
a) μ=0
b) μ=1
c) μ>0
d) μ<0

8. What is the standard value of μ in μ-law ?
a) 128
b) 255
c) 256
d) 0

9. The standard value of A in A-law is
a) 87
b) 88
c) 86.7
d) 87.6

10. Which type of quantization is most preferable for audio signals for a human ear?
a) Uniform quantization
b) Non uniform quantization
c) Uniform & Non uniform quantization
d) None of the mentioned

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