![American International University- Bangladesh (AIUB)
Faculty of Engineering (EEE)
Course Name : Digital Signal Processing Lab
Semester : Fall 2019-20 Sec :
Faculty : Tahia Fahrin Karim Marks: 20
Student Name: Student ID:
Final-Term
Marking Rubrics (to be filled by Faculty)
Category
Proficient
[5-4]
Good
[3]
Acceptable
[2]
Unacceptable
[1]
Secured
Marks
Algorithm/Logic
Algorithmof the
issue/problem to be
consideredcritically is stated
clearly anddescribed
comprehensively, delivering
relevant information
necessary for full
understanding.
Algorithmof the
issue/problem to be
consideredcritically is
stated, described, and
clarifiedso that
understandingis not
seriously impededby
omissions.
Algorithmof the
issue/problem to be
consideredcritically is
stated, but descriptionleaves
some terms undefined,
ambiguities unexplored,
boundaries undetermined,
Algorithmof the issue
/problem tobe
consideredcritically is stated
without clarification or
description.
Coding/ Syntax
Syntax of the programming
language is most efficient
andshortest.
Syntax of the programming
language is correct andno
error is found.
Syntax of the programming
language is 60% correct.
Syntax of the programming
language is erroneous.
Analysis
Detail analysis of the
problem solution is
presented. Correct
explanation is expectedwith
proper reference.
Justifiedanalysis is
presented.
Relevant analysis is
described.
Analysis is irrelevant to the
problem solution.
Organization of
the Report
The whole report is
exceptionallywell-organized
andvery easy to understand.
The report is thorough,
relevant andaccurate
informationtosome extent.
Informationlacks depth.
Accurate but inadequate or
repetitiveat times.
Vague, unclear.
Insufficient or irrelevant
information.
Comments:
Total Marks
(Out of 20 ):
Instructions:
Use the following code to record your voice and store it in MATLAB:
audio_signal=audiorecorder(8000,24,1); % sampling rate, sample precision in bits and no. of channels
disp('Start speaking.')
recordblocking(audio_signal,3) % Recording for 3 seconds
disp('End of recording')
play(audio_signal)
speech=getaudiodata(audio_signal); % Converting to a vector from an audio file
Assessment for:
P.05.3.P5 Create relevant resources for complex engineering problems using modern engineering tools.](https://image.slidesharecdn.com/assignmentdsp-220602140833-6ec0bfac/85/Assignment_DSP-doc-1-320.jpg)
Assignment_DSP.doc
- 1. American International University- Bangladesh (AIUB) Faculty of Engineering (EEE) Course Name : Digital Signal Processing Lab Semester : Fall 2019-20 Sec : Faculty : Tahia Fahrin Karim Marks: 20 Student Name: Student ID: Final-Term Marking Rubrics (to be filled by Faculty) Category Proficient [5-4] Good [3] Acceptable [2] Unacceptable [1] Secured Marks Algorithm/Logic Algorithmof the issue/problem to be consideredcritically is stated clearly anddescribed comprehensively, delivering relevant information necessary for full understanding. Algorithmof the issue/problem to be consideredcritically is stated, described, and clarifiedso that understandingis not seriously impededby omissions. Algorithmof the issue/problem to be consideredcritically is stated, but descriptionleaves some terms undefined, ambiguities unexplored, boundaries undetermined, Algorithmof the issue /problem tobe consideredcritically is stated without clarification or description. Coding/ Syntax Syntax of the programming language is most efficient andshortest. Syntax of the programming language is correct andno error is found. Syntax of the programming language is 60% correct. Syntax of the programming language is erroneous. Analysis Detail analysis of the problem solution is presented. Correct explanation is expectedwith proper reference. Justifiedanalysis is presented. Relevant analysis is described. Analysis is irrelevant to the problem solution. Organization of the Report The whole report is exceptionallywell-organized andvery easy to understand. The report is thorough, relevant andaccurate informationtosome extent. Informationlacks depth. Accurate but inadequate or repetitiveat times. Vague, unclear. Insufficient or irrelevant information. Comments: Total Marks (Out of 20 ): Instructions: Use the following code to record your voice and store it in MATLAB: audio_signal=audiorecorder(8000,24,1); % sampling rate, sample precision in bits and no. of channels disp('Start speaking.') recordblocking(audio_signal,3) % Recording for 3 seconds disp('End of recording') play(audio_signal) speech=getaudiodata(audio_signal); % Converting to a vector from an audio file Assessment for: P.05.3.P5 Create relevant resources for complex engineering problems using modern engineering tools.
- 2. DSP Lab Page - 2 Problem 1: Use your own voice to record an audio and save the recorded sound as an audio file, load it into MATLAB by following the instruction given above. Store the recording into the more usual vector of audio and show a time-domain plot of your recorded sound sample. Problem 2: Show the frequency domain response of the data by using the function freqz() in MATLAB by choosing the range of ω from 0 to π. Problem 3: Now add a white Gaussian noise to your recorded audio sample by using the function awgn(input signal, SNR). Use two different values for SNR (in dB) which indicates the quality of the channel characteristics, i.e. one good channel and one bad channel. Plot the noisy signal for two different values of SNR and observe the outputs. Which output is better? Justify your answer. Problem 4: Now design three different filters; LPF, HPF and BPF to pass this noisy signal and remove the noise. Choose the cutoff range from the frequency response curve of your voice signal. Plot the frequency response curve of all your filters and the filtered signals. Which filter output is better for your sound processing system? * There are many predefined window types for the filters in common use, and with different characteristics (that are adequately explained in most signal processing textbooks). Use any one type of window for designing your filter. FIR Filters 1. Rectangular 2. Bartlett 3. Hann 4. Hamming 5. Blackman 6. Kaiser