Digital Signal Processing Multiple Choice Questions and Answers

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

View Answer

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

View Answer

Answer:L+M-1

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

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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

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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

View Answer

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

View Answer

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

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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

View Answer

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}

View Answer

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}

View Answer