This download link is referred from the post: PTU B.Tech 5th Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University
Roll No. : Total No. of Pages : 02
Total No. of Questions : 18
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B.Tech. (ECE) (Sem.-5)
SPEECH AND AUDIO PROCESSING
Subject Code : BTEC-905E-18 M.Code : 78711
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
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- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
SECTION-A
Write briefly :
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- Define spectrogram? Explain why wideband spectrograms show periodicity in time?
- Define Linear Predictive Coding (LPC).
- What are the main differences between speech coding standard ITU-T G.726 and G.728 and G.729?
- Define moving average prediction.
- Define the term liftering, quefrency and cepstrum.
- Why LPC transformation is required? Write the names of major types of LPC transformation.
- Write the expression of logarithm quantizer and its advantages over uniform quantizer.
- Write any two types of time domain pitch detection algorithms (PDAs) and their key features.
- What is Waveform approximating speech coding technique?
- What is the difference between Codebook Excitation and self-excitation?
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SECTION-B
- With the help of suitable diagrams, explain in detail the Human Auditory System.
- How linear predictive coding used in speech production. Explain in detail the Covariance methods for LPC analysis.
- Explain how pitch is estimated using cesptrum analysis?
- Explain following Excitation codebook search method:
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a) State-save method
b) Zero input zero output method - Explain levinson-Durbin algorithm for calculation of prediction coefficients.
SECTION-C
- With the help of proper block diagram and mathematical expressions, explain forward and backward adaptive quantizer.
- How is code book generated for CELP? What are the limitations of CELP? What are the modifications suggested in the basic CELP coder?
- Explain LPC to LSF and LSF to LPC Transformation in detail with proper mathematical expressions.
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Tech 5th Semester Last 10 Years 2011-2021 Previous Question Papers|| Punjab Technical University