Digital Signal Processing Questions and Answers
Q1.
What is the main function of (D/A) or DAC converter?
Answer :
Converts Digital to Analog Signal
Q2.
The S/H is a digitally controlled analog circuit that tracks the analog input signal during the sample mode and then holds it fixed during the hold mode to the instantaneous value of the signal at the time the system is switched from the sample to the hold mode.
Answer :
True
Q3.
The crosshatched areas gives two types of Quantization error in DM, they are?
Answer :
Slope-overload distortion & Granular noise
Q4.
In DM, By increasing Δ, reduces the overload distortion but increases the granular noise, and vice versa.
Answer :
True
Q5.
What is the expansion of DPCM?
Answer :
Differential Pulse Code Modulation
Q6.
What are the main uses of DPCM?
Answer :
Speech Encoding and Transmission over telephone channels
Q7.
If we down-sample a signal x(n), then the resulting signal will be an aliased version of x(n).
Answer :
True
Q8.
What is the folding frequency for the aliased version of x(n) with sampling rate F?
Answer :
F/2D
Q9.
There is no requirement to process the various signals at different rates commensurate with the corresponding bandwidths of the signals.
Answer :
False
Q10.
What is the process of converting a signal from a given rate to a different rate?
Answer :
Sampling rate conversion
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