STUPIDSID
1(a)
Explain in detail the human hearing mechanism with suitable diagrams.
5 M
1(b)
Explain the procedure for computation of pitch and formants based on cepstral analysis of speech.
5 M
1(c)
State and explain the applications of LPC to speech processing.
5 M
1(d)
Draw the block schematic for a text-to- speech synthesis system and explain the functions of each block.
5 M
2(a)
Explain linear filtering interpretation of short-time spectrum analysis with suitable block diagram.
7 M
2(b)
With a neat block diagram, explain non-linear smoother for estimation of parameters in speech processing. Justify the need for delays in non-linear smoother.
8 M
2(c)
Explain general discrete-time model for speech production.
5 M
3(a)
With related equations explain the terms i) Short-time energy
ii) Short-time average magnitude and iii) Short-time zero crossing rate. How do you distinguish voiced and unvoiced segments based on these parameters?
ii) Short-time average magnitude and iii) Short-time zero crossing rate. How do you distinguish voiced and unvoiced segments based on these parameters?
7 M
3(b)
Explain pitch estimation based of FFT analysis of speech signaL.
8 M
3(c)
Write a note on production of semivowels and nasals. Give the reason of broadening of nasal reasonances.
5 M
4(a)
Draw a diagram of single-stage lattice and write the eqautions for the lattice.
5 M
4(b)
Explain the convariance method for LPC analysis.
5 M
4(c)
What is CELP? How is the code book generated for CELP? What are the limitations of CELP? What are the modifications suggested in the basic CELP coder?
10 M
5(a)
How will you convert power spectrum to mel scale? Explain the procedure for calculations of MFCC with a block schematic. Clearly explain how the integration of poweris done on mel scale filters. How will you compress the amplitude of the power spectrum? How is spectral smoothing done?
10 M
5(b)
Write a detailed note on place and manner of articulation.
10 M
6(a)
Explain the terms "liftering" and "quefrency" in connection with cepstral analysis of speech signal.
10 M
6(b)
What is HMM? What is hidden in it? Draw a state diagram for HMM as general case and show how you can write a transition for HMM as a general case and show how you can write a transition matrix.
10 M
6(c)
Explain speech synthesis using phone-based synthesizer.
5 M
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