Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 Overlap add and Overlap save are the two methods for linear FIR filtering a long sequence on a block-by-block basis using DFT.
A True
B False

Answer:True
2 In Overlap save method of long sequence filtering, what is the length of the input sequence block?
A L+M+1
B L+M
C L+M-1
D None of the mentioned

Answer:L+M-1
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3 In Overlap save method of long sequence filtering, how many zeros are appended to the impulse response of the FIR filter?
A L+M
B L
C L+1
D L-1

Answer:L-1
4 The first M-1 values of the output sequence in every step of Overlap save method of filtering of long sequence are discarded.
A True
B False

Answer:True
5 In Overlap add method, what is the length of the input data block?
A L-1
B L
C L+1
D None of the mentioned

Answer:L
6 Which of the following is true in case of Overlap add method?
A M zeros are appended at last of each data block
B M zeros are appended at first of each data block
C M-1 zeros are appended at last of each data block
D M-1 zeros are appended at first of each data block

Answer:M-1 zeros are appended at last of each data block
7 In which of the following methods, the input sequence is considered as shown in the below diagram?

Digital Image Processing

A Overlap save method
B Overlap add method
C Overlap add & save method
D None of the mentioned

Answer:Overlap save method
8 In which of the following methods, the output sequence is considered as shown in the below diagram?

Digital Signal Processing

A Overlap save method
B Overlap add method
C Overlap add & save method
D None of the mentioned

Answer:Overlap add method
9 What is the value of x(n)*h(n), 0≤n≤11 for the sequences x(n)={1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} and h(n)={1,1,1} if we perform using overlap add fast convolution technique?
A {1,3,3,1,1,3,5,2,2,2,3,6}
B {1,2,0,-3,4,2,-1,1,-2,3,2,1,-3}
C {1,2,0,3,4,2,1,1,2,3,2,1,3}
D {1,3,3,-1,1,3,5,2,-2,2,3,6}

Answer:{1,3,3,-1,1,3,5,2,-2,2,3,6}
10 What is the value of x(n)*h(n), 0≤n≤11 for the sequences x(n)={1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} and h(n)={1,1,1} if we perform using overlap save fast convolution technique?
A {1,3,3,-1,1,3,5,2,-2,2,3,6}
B {1,2,0,-3,4,2,-1,1,-2,3,2,1,-3}
C {1,2,0,3,4,2,1,1,2,3,2,1,3}
D {1,3,3,1,1,3,5,2,2,2,3,6}

Answer:{1,3,3,-1,1,3,5,2,-2,2,3,6}

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