A/D Converter Oversampling MCQ’s

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This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “A/D Converter Oversampling”.

1. If the difference d(n) = x(n)–ax(n-1), then what is the optimum choice for a = ?
a) γxx(1)σ2x
b) γxx(0)σ2x
c) γxx(0)σ2d
d) γxx(1)σ2d

2. What is the expansion of DPCM?
a) Differential Pulse Code Modulation
b) Differential Plus Code Modulation
c) Different Pulse Code Modulation
d) None of the mentioned

3. In DM, What is the order of predictor is used?
a) Zero-order predictor
b) Second-order predictor
c) First-order predictor
d) Third-order predictor

4. The differential predictive signal quantizer system is known as?
a) DCPM
b) DMPC
c) DPCM
d) None of the mentioned

5. For a given number of bits, the power of quantization noise is proportional to the variance of the signal to be quantized.
a) True
b) False

6. What is the variance of the difference between two successive signal samples, d(n) = x(n)–ax(n-1)?
a) σ2d=2σ2x[1−a2]
b) σ2d=σ2x[1+a2]
c) σ2d=σ2x[1−a2]
d) σ2d=2σ2x[1+a2]

7. In the equation xq(n)=axq(n-1)+dq(n), if a < 1 then integrator is called?
a) Leaky integrator
b) Ideal integrator
c) Ideal accumulator
d) Both Ideal integrator & accumulator

8. To reduce the dynamic range of the difference signal d(n) = x(n) – x^(n), thus a predictor of order p has the form?
a) x^(n)=∑pk=1akx(n+k)
b) x^(n)=∑pk=1akx(n−k)
c) x^(n)=∑pk=0akx(n+k)
d) x^(n)=∑pk=0akx(n−k)

9. What is the quantity ax(n-1) is called?
a) Second-order predictor of x(n)
b) Zero-order predictor of x(n)
c) First-order predictor of x(n)
d) Third-order predictor of x(n)

10. The simplest form of differential predictive quantization is called?
a) AM
b) BM
c) DM
d) None of the mentioned

11. In DM, the quantizer is a simple ________ bit and ______ level quantizer.
a) 2-bit, one-level
b) 1-bit, two-level
c) 2-bit, two-level
d) 1-bit, one level

12. What are the main uses of DPCM?
a) Speech Decoding and Transmission over mobiles
b) Speech Encoding and Transmission over mobiles
c) Speech Decoding and Transmission over telephone channels
d) Speech Encoding and Transmission over telephone channels

13. In the equation xq(n)=axq(n-1)+dq(n), if a = 1 then integrator is called?
a) Leaky integrator
b) Ideal integrator
c) Ideal accumulator
d) Both Ideal integrator & accumulator

14. What is the variance of the difference between two successive signal samples, d(n) = x(n) – x(n-1)?
a) σ2d=2σ2x[1+γxx(1)]
b) σ2d=2σ2x[1−γxx(1)]
c) σ2d=4σ2x[1−γxx(1)]
d) σ2d=3σ2x[1−γxx(1)]

15. What is the abbreviation of DM?
a) Diameter Modulation
b) Distance Modulation
c) Delta Modulation
d) None of the mentioned

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