CodeNo.: 3211

FACULTY OF ENGINEERING

B.E. IV/IV Year (ECE) II Semester (Main) Examination, May/June, 2011SPEECH PROCESSING

(Elective- III)Time: 3 Hours] [Max. Marks: 75

Answerall questionsfromPartA.Answerany five questionsfrompart B.

Part A - (Marks: 25)

1. What are the differencesbetweenUniform quantisation and logarithmicquantisation? 3

2. Draw the block diagram of basic parallel format synthesiser. 33. What is Pulse and RELP Vocoders? 24. What are the different problems in automatic speech recognition? 25. What is Vector quantization? 36. What do you mean by Pitch extraction? 27. Define end point detection. 28. What are the properties of speechmaking the automatic speechrecognition as

challenging and difficult? 39. Draw the block diagram of differential PCM. 310. Define auto correlation function. 2

Part B - (Marks: 50 )

11. (a) Explain logarithmic quantisation.(b) What is uniform quantisation?

12. (a) Explain the generaldiscrete time model for speech production with ablock diagram.Explain pitch synchronous analysis.

Explain short term energyfunction and vectorquantisation.Explain about zero crossing rate and format tracking.

Draw the block diagram of text to speechconversion using speechsynthesiser.

(b) Explain linear predictivesynthesiser.

15. (a) Explain the speechrecognition with HMM model.(b) What is Pitch synchronous analysis?

16. (a) Explain how can we find the formats of a phoneme.(b) Explain channel vocoder.

17.Explainall aboutdynamictime- warpingin detail.

(b)

13. (a)(b)

14. (a)

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