Q.1
Uniform quantizer is also known as
  • a) Low rise type
  • b) Mid rise type
  • c) High rise type
  • d) None of the mentioned
Q.2
The SNR value can be increased by _____ the number of levels.
  • a) Increasing
  • b) Decreasing
  • c) Does not depend on
  • d) None of the mentioned
Q.3
Prediction gain _____ for better prediction.
  • a) Increases
  • b) Decreases
  • c) Remains same
  • d) None of the mentioned
Q.4
Delta modulation is
  • a) 1 bit DPCM
  • b) 2 bit DPCM
  • c) 4 bit DPCM
  • d) None of the mentioned
Q.5
1 bit quantizer is a
  • a) Hard limiter
  • b) Two level comparator
  • c) Hard limiter & Two level comparator
  • d) None of the mentioned
Q.6
If step size is increased _____ occurs.
  • a) Slope overload distortion
  • b) Granular noise
  • c) Slope overload distortion & Granular noise
  • d) None of the mentioned
Q.7
Which helps in maintaining the step size?
  • a) Delta modulation
  • b) PCM
  • c) DPCM
  • d) Adaptive delta modulation
Q.8
The low pass filter at the output end of delta modulator depends on
  • a) Step size
  • b) Quantization noise
  • c) Bandwidth
  • d) None of the mentioned
Q.9
In early late timing error detection method if the bit is constant, then the slope will be
  • a) Close to zero
  • b) Close to infinity
  • c) Close to origin
  • d) None of the mentioned
Q.10
The theoretical gain in zero crossing TED is greater than early late TED.
  • a) True
  • b) False
Q.11
Non uniform quantizer ______ distortion.
  • a) Increases
  • b) Decreases
  • c) Does not effect
  • d) None of the mentioned
Q.12
Vector quantization is used in
  • a) Audio coding
  • b) Video coding
  • c) Speech coding
  • d) All of the mentioned
Q.13
The spectral density of white noise is
  • a) Exponential
  • b) Uniform
  • c) Poisson
  • d) Gaussian
Q.14
The probability density function of the envelope of narrow band noise is
  • a) Uniform
  • b) Gaussian
  • c) Rayleigh
  • d) Rician
Q.15
The type of noise that interferes much with high frequency transmission is
  • a) White
  • b) Flicker
  • c) Transit time
  • d) Shot
Q.16
Thermal noise power of a resistor depends upon
  • a) Its resistance value
  • b) Noise temperature
  • c) Bandwidth
  • d) Ambient temperature
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