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Ics2303:Multimedia Systems Question Paper

Ics2303:Multimedia Systems

Course:Computer Science

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

TIME: 2 HOURS
INSTRUCTIONS: Answer question one and any other two questions
QUESTION ONE – 30 MARKS
a. Distinguish between lossy and lossless compression and explain suitable application for each. (8 Marks) b. Citing examples explain three colour models. (6 Marks) c. Identify three multimedia design paradigms and explain your answer. (6 Marks) d. Define the term: (6 Marks) i. Image resolution ii. Color depth iii. Frame rate and explain the influence each has on multimedia experience
e. A bitmap image has resolution 640 x 480 pixels. Each pixel is 24 bit deep. What is the size of the bitmap in bytes? (4 Marks)
QUESTION TWO – 20 MARKS
a. Describe the multimedia authoring process in details. (10 Marks) b. Differentiate between a digital audio and MIDI. (4 Marks) c. Explain the three conventional broadcast systems. (6 Marks)
QUESTION THREE – 20 MARKS
a. Provide justification for Nyquist’s sampling Theorem. (4 Marks) b. Distinguish between MPEG-1 and MPEG-2 (6 Marks) c. Describe run-length and Huffman encoding and explain how they achieve compression. (10 Marks)
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QUESTION FOUR – 20 MARKS
a. Describe five capabilities of a typical music editing software. (5 Marks) b. Discuss any five image formats. (5 Marks) c. An image 540 x 480 pixels is streamed via the internet at the speed of 512kbs. If the image has a depth of 16bits per pixel how long will it take to stream the whole image? (4 Marks) d. Distinguish clearly between bitmap image and vector graphic. (6 Marks)
QUESTION FIVE – 20 MARKS
a. The critical bandwidth for average human hearing is a constant 100Hz for frequencies less than 500Hz and increases (approximately) linearly by 100Hz for each additional 500Hz. i. Given a frequency of 300Hz, what is the next highest (integer) frequency signal that is distinguished by the human ear assuming the later signal is of substantially lower amplitude? (5 Marks) ii. Given a frequency of 5000Hz, what is the next highest (integer) frequency signal that is distinguishable by the human ear assuming the latter signal is of substantially lower amplitude? (4 Marks)
b. Explain the benefits of converting RGB values to YIQ (or any luminance + chrominance representation) when transmitting a color signal. (5 Marks) c. Why is it not efficient to simply apply an image coder (say JPEG) to individual video frames? (4 Marks) d. Explain why compressed video stream are sensitive to transmission errors. (2 Marks)

Ics2303:Multimedia Systems Question Paper

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