Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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1 The selection of the sampling rate Fs=1/T, where T is the sampling interval, not only determines the highest frequency (Fs/2) that is preserved in the analog signal but also serves as a scale factor that influences the design specifications for digital filters.
A True
B False

Answer:True
2 What is the configuration of system for digital processing of an analog signal?
A Analog signal|| Pre-filter -> D/A Converter -> Digital Processor -> A/D Converter -> Post-filter
B Analog signal|| Pre-filter -> A/D Converter -> Digital Processor -> D/A Converter -> Post-filter
C Analog signal|| Post-filter -> D/A Converter -> Digital Processor -> A/D Converter -> Pre-filter
D None of the mentioned

Answer:Analog signal|| Pre-filter -> A/D Converter -> Digital Processor -> D/A Converter -> Post-filter
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3 In DM, further the two integrators at encode are replaced by one integrator placed before comparator, and then such system is called?
A System-delta modulation
B Sigma-delta modulation
C Source-delta modulation
D None of the mentioned

Answer:Sigma-delta modulation
4 If the input analog signal is within the range of the quantizer, the quantization error eq (n) is bounded in magnitude i.e., |eq (n)| < Δ/2 and the resulting error is called?
A Granular noise
B Overload noise
C Particulate noise
D Heavy noise

Answer:Granular noise
5 If the input analog signal falls outside the range of the quantizer (clipping), eq (n) becomes unbounded and results in _____________
A Granular noise
B Overload noise
C Particulate noise
D Heavy noise

Answer:Overload noise
6 In the mathematical model for the quantization error eq (n), to carry out the analysis, what are the assumptions made about the statistical properties of eq (n)? i. The error eq (n) is uniformly distributed over the range — Δ/2 < eq (n) < Δ/2.
ii. The error sequence is a stationary white noise sequence. In other words, the error eq (m) and the error eq (n) for m≠n are uncorrelated.
iii. The error sequence {eq (n)} is uncorrelated with the signal sequence x(n).
iv. The signal sequence x(n) is zero mean and stationary.
A i, ii & iii
B i, ii, iii, iv
C i, iii
D ii, iii, iv

Answer:i, ii, iii, iv
7 What is the abbreviation of SQNR?
A Signal-to-Quantization Net Ratio
B Signal-to-Quantization Noise Ratio
C Signal-to-Quantization Noise Region
D Signal-to-Quantization Net Region

Answer:Signal-to-Quantization Noise Ratio
8 What is the scale used for the measurement of SQNR?
A DB
B db
C dB
D All of the mentioned

Answer:dB
9 In IIR Filter design by the Bilinear Transformation, the Bilinear Transformation is a mapping from
A Z-plane to S-plane
B S-plane to Z-plane
C S-plane to J-plane
D J-plane to Z-plane

Answer:S-plane to Z-plane
10 In Bilinear Transformation, aliasing of frequency components is been avoided.
A True
B False

Answer:True

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