Calicut University 2006 B.Tech Information Technology DIGITAL SIGNAL COMPRESSION - Question Paper

C 20281
EIGHTH SEMESTER B.TECH. (ENGINEERING) DEGREE
EXAMINATION, JUNE 2006
IT 2K 803-DIGITAL SIGNAL COMPRESSION
Time : 3 Hours Maximum : 100 Marks

Part A
ans all ques..
every ques. carries five marks.
1.aWhat is meant by variable rate code ? discuss.

b.Explain the quantization noise in delta modulation system.

c.Explain what is meant by threashold coding.

d.Explain what is meant by rate distortion bound.

e.Explain what is meant by tree structured vector quantization. explain briefly about vector quantization for speech coding. discuss MPEG standard for video.

f.What is meant by run-length coding ? discuss.

(8 x five = 10 marks)

Part B

ans all ques..
every ques. carries 15 marks.
II. (a) Draw the block diagram of lossy predictive coding system and discuss.
Or
(b) Draw the block diagram of adaptive delta modulation system and explain the function in
detail.

111. (a) Explain about bit allocation algorithm. What is meant by integer bit allocation algorithm?
Or
(b) What is meant by subband coding of speech signal ? discuss dynamic bit allocation by subband
coding with neat block diagram.

IV. (a) (i) discuss latcic vector quantization. (? marks)
(ii) Explain adaptive vector quantization for speech coding. (ti marks)
Or
(b) (i) Explain quantizer design based on squared euclidean distance measure. (8 marks)
(ii) Draw the block diagram of multi-state vector quantizer encoder and discuss. (7 marks)

V. (a) (i) discuss image compression by fractal based technique. (8 marks
(b) Explain CELP model of speech production.
Or
(a) l:i discuss Huffman coding procedure fur constructing optima? code. (8 Marks)
(b) Write short note on Lempel-ziv algorithm. (7 marks)
[4 x 15 = 60 marks)

Earning:   Approval pending.