NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
APRIL 2019 EXAMINATION

COURSE CODE: DAM891

COURSE TITLE: Advanced Multimedia Technology

CREDIT: 3 Units

TIME ALLOWED: 2½ Hours

INSTRUCTION: Answer Question 1 and any other FOUR (4) Questions

1a) Define Multimedia? (2 marks)

1b) Briefly explain the following terms:                 

1. Frame rate  (1 mark)        
2. Pixel           (2 marks)
3. Animation  (4 marks)
4. Aspect ratio (2 marks)

1c) In your own words, describe the following terms

            i) Luminance              (2½ marks)

            ii) Chrominance         (3½ marks)

1d) Differentiate between lossy and lossless compression?  (2 marks)

1e) State the limitations of Pattern Matching. (3 marks)

2a) Briefly describe the three main properties of a Colour Source. (4½ marks)

2b) In the context of image digital signal processing, define Noise? (1½ marks)

2c) Write short notes on the following:

               (i)     Salt and pepper noise (2 marks)

               (ii)    Periodic noise             (1½ marks)

               (iii)   Gaussian noise            (2½ marks)

3a) What do you understand by Video scanning?     (1½ marks)

3b) State the capabilities of a functional Multimedia System (2½ marks)

3c) Highlight five advantages and three disadvantages of compression?     (8 marks)

4a) Briefly describe the following:

            (i) Vector Quantization (3 marks)

(ii) Transform coding (3 marks)

4b) Write a short note on Run-Length encoding (RLE). (3 marks)

4c)       Using run length encoding (RLE), encode the following binary image            (3 marks)

1 1 1 0 0 0

0 1 1 1 1 1

1 1 1 1 0 1

0 0 1 1 1 1

1 1 0 0 0 0

1 0 0 0 0 1   

5a) Describe the subclasses of image processing.      (7 marks)

5b) A method of encoding is to encode each row as a list of pairs of numbers; the first number in each pair gives the starting position of a run of 1’s and the second number its length. Using this method, give the binary image of the code below:

(33) (1241) (1361)(25)(15)(2252)   (3 marks)

5c) State four of the challenges facing multimedia systems.             (2 marks)

6a) Discuss the various distribution standards of home television. (7½ marks)

6b)  Briefly explain the term ‘Median Filtering’.      (3 marks)

6c) In the context of image processing, briefly define the term ‘Morphology’. (1½ marks)