Anna University Previous Years Question Papers
Question paper code: 71399
B.E,B.TECH DEGREE EXAMINATION, APRIL/MAY-2015
Seventh semester
Computer science and Engineering
CS 2403/ CS 73-DIGITAL SIGNAL PROCESSING
(Common to fifth semester-information technology)
(Regulation 2008)
(Also common to PTCS 2303-Digtal signal processing for B.E.(part-time)sixth semester Computer science and Engineering Regulation 2009 )
Use of relevant BIS standard and hand book is permitted.
Time- Three hour
Maximum mark-100
Answer all questions
PART A-10X2=20marks
1. State sampling theorem.
2. What is quantization error?
3. Compute DFT of the signal x(n)=δ(n)
4. What is meant by radix-2 FFT?
5. What is meant by bilinear transformation method of designing IIR filter?
6. Draw the direct from realization of IIR system?
7. What is linear phase responsible of a filter?
8. State any two important properties of FIR filter?
9. Write the main application areas of speech coding.
10. What is adaptive filter?
PART B-4X16=80 MARKS
11.(a)(i) Find the convolution of given signal.
X(n)=3n u(-n) and h(n)=)(1/3)n u(n-2)
≤sequences h(n)={1,2,3,4}&x(n)={1,2,3}.
(or)
(b)Explain the process of analog to digital conversion of signal in terms of sampling, quantization and coding.
12(a) Find the 8point DFT of the sequence using radix-2 DIF algorithm
X(n)=10 ≤; n ≤2 =0; otherwise
(or)
(b) Compute the 8point DFT of the sequence x(n)={1,-1,1,-1,0,0,0,0} using radix-2 DIF algorithm.
13.(a)Design a digital butter worth filter satisfying the constraints
0.707 ≤ H (e jw) ≤1;0≤w ≤π/2
H (e jw) ≤ 0.2 :3π/4≤ w≤π
-with T=1sec using bilinear transformation method.
(or)
(b)Obtain the direct from I, direct from II and cascade form realization of the following system function.
Y(n)=-0.1y(n-1)+ 0.2y(n-2)+3x (n)+3.6x(n-1)+0.6x(n-2)
14.(a) Discuss the design procedures of FIR filter using frequency sampling method.
(or)
(b)Design ideal differentiator with frequency responses
H(ejw)=jw ;-π≤w≤π using Hamming window with N=7.
15.(a)(i) Discuss about multi rate signal processing.
(ii) Write about notes on speech compression.
(or)
(b) Discuss the role of DSP in image enhancement with an example.
Question paper code: 71399
B.E,B.TECH DEGREE EXAMINATION, APRIL/MAY-2015
Seventh semester
Computer science and Engineering
CS 2403/ CS 73-DIGITAL SIGNAL PROCESSING
(Common to fifth semester-information technology)
(Regulation 2008)
(Also common to PTCS 2303-Digtal signal processing for B.E.(part-time)sixth semester Computer science and Engineering Regulation 2009 )
Use of relevant BIS standard and hand book is permitted.
Time- Three hour
Maximum mark-100
Answer all questions
PART A-10X2=20marks
1. State sampling theorem.
2. What is quantization error?
3. Compute DFT of the signal x(n)=δ(n)
4. What is meant by radix-2 FFT?
5. What is meant by bilinear transformation method of designing IIR filter?
6. Draw the direct from realization of IIR system?
7. What is linear phase responsible of a filter?
8. State any two important properties of FIR filter?
9. Write the main application areas of speech coding.
10. What is adaptive filter?
PART B-4X16=80 MARKS
11.(a)(i) Find the convolution of given signal.
X(n)=3n u(-n) and h(n)=)(1/3)n u(n-2)
≤sequences h(n)={1,2,3,4}&x(n)={1,2,3}.
(or)
(b)Explain the process of analog to digital conversion of signal in terms of sampling, quantization and coding.
12(a) Find the 8point DFT of the sequence using radix-2 DIF algorithm
X(n)=10 ≤; n ≤2 =0; otherwise
(or)
(b) Compute the 8point DFT of the sequence x(n)={1,-1,1,-1,0,0,0,0} using radix-2 DIF algorithm.
13.(a)Design a digital butter worth filter satisfying the constraints
0.707 ≤ H (e jw) ≤1;0≤w ≤π/2
H (e jw) ≤ 0.2 :3π/4≤ w≤π
-with T=1sec using bilinear transformation method.
(or)
(b)Obtain the direct from I, direct from II and cascade form realization of the following system function.
Y(n)=-0.1y(n-1)+ 0.2y(n-2)+3x (n)+3.6x(n-1)+0.6x(n-2)
14.(a) Discuss the design procedures of FIR filter using frequency sampling method.
(or)
(b)Design ideal differentiator with frequency responses
H(ejw)=jw ;-π≤w≤π using Hamming window with N=7.
15.(a)(i) Discuss about multi rate signal processing.
(ii) Write about notes on speech compression.
(or)
(b) Discuss the role of DSP in image enhancement with an example.
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