M.E DEGREE  EXAMINATION

Second Semester   

Communication Systems  

 

WS 1621 MULTIMEDIA COMPRESSION TECHNIQUES   

Time: Three Hours               Maximum: 100 Marks

 

Answer ALL Questions

 

PART A (10 X 2 = 20 Marks)

 

 

1.                  What is the need for data compression?

2.                  List out the redundancies present in multimedia Information?

3.                  What is the Idea behind the dictionary based techniques?

4.                  What is meant by coding redundancy?

5.                  What is μ-law?

6.                  What is the idea behind subband coding?

7.                  What is the idea behind predictive coding techniques.

8.                  Why wavelet is preferred for Image compression?

9.                  What is the idea behind video compression?

10.              State the Intended applications of MPEG-7.

 

PART B (5 X 16 = 80 Marks)

 

11.              a. 1. Describe the classification of compression techniques. (8)

                2.  Explain briefly vector quantization                                            (8)

OR

                        b.  1. Explain briefly the source modeling techniques                  (8)

                             2. How compression algorithms are evaluated.                     (8)  

 

12.              a. Explain in detail the adaptive Huffman coding with an example.

 

OR

b.      Explain in detail the LZW method with an example.  

 

13.              a.   1. Explain in detail the basic G722 audio coding functionalities. (8)

                  2. What is the role of subband coding in compression technique. (8)

 

OR

b.      1. Explain in detail the MPEG audio coding                                (8)

2.      Explain in detail the progressive coders.                         (8)  

 

14.       a.   Explain in detail the JPEG standard.    

 

                                                            OR

b.        Explain in detail the JBIG standard and its relevance.    

 

15.       a.     Explain in detail the H.261 standard.  

           

                                                            OR

b.          Write short notes on   (8+8)

a.       DVI Technology  

b.      Motion Estimation and Compensation techniques.

 

 

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