Digital Signal Processing Course
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Questions and Answers

What is the primary focus of the course in terms of signal analysis?

  • Only time-domain analysis
  • Only frequency-domain analysis
  • Time-domain and frequency-domain analysis (correct)
  • Analysis of non-linear systems

    • What is the main difference between continuous-time and discrete-time signals?

  • The frequency of the signal
  • The type of system used (linear or non-linear)
  • The number of independent variables
  • The type of processing used (analog or digital) (correct)

    • What is the purpose of using transformations in signal analysis?

  • To analyze linear time-invariant systems (correct)
  • To perform spectral analysis
  • To design digital filters
  • To convert analog signals to digital signals

    • What type of filters can be designed using the knowledge gained from this course?

    <p>Both FIR and IIR filters</p> Signup and view all the answers

    What is the outcome of being able to compare the advantages and disadvantages of analog and digital signal processing?

    <p>Ability to choose the best approach for a given application</p> Signup and view all the answers

    What is one of the applications of signal processing covered in this course?

    <p>Image processing</p> Signup and view all the answers

    What is a discrete-time signal often identified as?

    <p>A sequence of numbers</p> Signup and view all the answers

    What is the daily closing stock market average an example of?

    <p>A discrete-time signal</p> Signup and view all the answers

    What is the term for the time interval between samples in a discrete-time signal?

    <p>Sampling interval</p> Signup and view all the answers

    How can a discrete-time signal be defined?

    <p>Either by specifying a rule or by explicitly listing the values</p> Signup and view all the answers

    What is the notation for a discrete-time signal where the sampling intervals are equal?

    <p>x(nTs)</p> Signup and view all the answers

    What is the term for the values of a discrete-time signal obtained by sampling a continuous-time signal?

    <p>Samples</p> Signup and view all the answers

    What is a major concern regarding gearboxes in industrial and vehicle applications?

    <p>The wear and tear of gear teeth over time</p> Signup and view all the answers

    What is the primary goal of detecting and monitoring defective gear teeth?

    <p>To enhance the reliability of the entire machine</p> Signup and view all the answers

    What is the technique used in digital image enhancement to increase image contrast?

    <p>Histogram equalization</p> Signup and view all the answers

    What is the nature of the digital information used in digital image enhancement?

    <p>Pixels</p> Signup and view all the answers

    What is the relationship between frequency and period?

    <p>They are inversely proportional to each other</p> Signup and view all the answers

    What does a high frequency indicate?

    <p>A change in a short span of time</p> Signup and view all the answers

    In what dimension does digital image enhancement operate?

    <p>Two dimensions</p> Signup and view all the answers

    What is the purpose of vibration signature analysis for defective gear teeth?

    <p>To detect and monitor defective gear teeth</p> Signup and view all the answers

    What is the phase of a waveform that is offset 1/6 cycle with respect to time 0?

    <p>30° or π/6 radians</p> Signup and view all the answers

    What does the time-domain plot of a sine wave represent?

    <p>A continuous waveform with respect to time</p> Signup and view all the answers

    What is the frequency of the power used at home, according to the example?

    <p>60 Hz</p> Signup and view all the answers

    How are three sine waves with the same amplitude and frequency, but different phases, represented?

    <p>As three identical waveforms with different phases</p> Signup and view all the answers

    What convention is used when no arrow is indicated in a sequence?

    <p>The first term corresponds to n = 0 and all the values of the sequence are zero for n &lt; 0</p> Signup and view all the answers

    What is the unit step function u(t) also known as?

    <p>The Heaviside unit function</p> Signup and view all the answers

    What is the value of the unit step function u(t) at t = 0?

    <p>Undefined</p> Signup and view all the answers

    What is the unit impulse function also known as?

    <p>The Dirac delta function</p> Signup and view all the answers

    What is the purpose of the arrow in the sequence shown in Fig.1-l(b)?

    <p>To denote the n = 0 term</p> Signup and view all the answers

    What is the difference between the unit step function u(t) and the shifted unit step function u(t - to)?

    <p>The shifted unit step function is shifted in time</p> Signup and view all the answers

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