Question Paper: Speech & Audio Signal Processing Question Paper - December 2016 - Electronics and Telecom Engineering (Semester 8) - Savitribai Phule Pune University (SPPU)
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Speech & Audio Signal Processing - December 2016

SPPU Electronics and Telecom Engineering (Semester 8)

Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question Q.1(a, b) and Q.2(a, b)

1(a) Explain voiced and uninvoiced speech signal? Explain its significance in speech processing. 6 marks

1(b) What is Pitch of speech signal? What is formant frequencies in speech signal 6 marks

2(a) Explain LTV model of speech signal. 6 marks

2(b) Explain the concept of critical band and auditory systems as a fiter bank? 6 marks

Solve any one question Q.3(a, b) and Q.4(a, b)

3(a) What is spectrogram? What are their types? Explain its significance and applications in speech processing. 6 marks

3(b) Explain Mel Scale and Bark Scale. 6 marks

4(a) How Short time energy, short time average meagnitude short time average zero crossing rate is useful in speech processing? 6 marks

4(b) Explain the concept of Spectral entropy and Spectral Roll-off. 6 marks

Solve any one question Q.5(a, b) and Q.6(a, b)

5(a) Explain basic principal of Linear Predictive Analysis? Explain autocorrelation method for format analysis. 6 marks

5(b) Explain the Cholesky Decomposition method for solution of LPC equations. 6 marks

6(a) Explain frequency domain interpretation of LP analysis? 6 marks

6(b) Explain Durbin algorithm LPC analysis. 6 marks

Solve any one question Q.7(a, b) and Q.8(a, b)

7(a) Explain how pitch is estimated using cesptrum analysis? 6 marks

7(b) Explain in detail estimation of formant and pitch parameters using cepstrum. 6 marks

8(a) What is cepstrum? Explain in detail computation of Mel Frequency Cepstral Coefficient (MFCC). 6 marks

8(b) What is long term complex cepstrum? What is short term complex cepstrum? Explain the properties of the complex cepstrum. 6 marks

Solve any one question Q.9(a,b) and Q.10(a,b,c)

9(a) Explain in detail automatic speech recognition system with suitable example 6 marks

9(b) What is the difference between speaker identification and speaker verification? What are the features used for speaker recognition / verification system and how? 6 marks

10(a) What is DTW? Explain with suitable example. 6 marks

10(b) What are the techniques od speech enhancement spectral subtraction method? 6 marks

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