UNIVERSITY EXAMINATIONS: 2021/2022
EXAMINATION FOR DIPLOMA IN INFORMATION TECHNOLOGY
DIT 506: DESKTOP PHOTOGRAPHY AND VIDEO EDITING
FULL TIME/PART TIME
DATE: DECEMBER, 2021 TIME: 2 HOURS
INSTRUCTIONS: Answer questions one and any other two questions.
QUESTION ONE
a) Explain the technique used in video compression. [2 Marks]
b) Differentiate between stereo and non-stereo audio mean. [2 Marks]
c) The table below represents symbols used for communication and the number of
occurrences in a message.
d) Using Huffman encoding algorithm, draw the Huffman tree and code the code for each
character. [6 Marks]
e) Distinguish between lossy and lossless compression and give their applications.
[4 Marks]
f) Calculate the size in GB of a video file of duration of 1 hour, a frame size of 640×480 at
a color depth of 24bits and a frame rate of 25fps. [6 Marks]
QUESTION TWO
a) Explain three main features possessed by the film cameras that digital cameras straggles to
achieve. [6 Marks]
b) How much memory is required for an 5160 by 4290 display resolution with colour depth
24 bits? [5 Marks]
c) Explain how the following affects the quality of an image. [4 Marks]
QUESTION THREE
a) What is the size of uncompressed stereo sound with CD quality for 3 minute of audio :
[4 Marks]
b) Using LZ coding encode the following text
ABBBAAMMMNNNABBNABCCCBAABBM [6 Marks]
c) Explain the importance of having standards in video production industries. [5 Marks]
QUESTION FOUR
a) Explain any FIVE desirable properties of a good video. [5 Marks]
b) Imagine that a client has approached you, and wants you to do a video shooting for him to
help pass the message “stand by me”, aiming at spreading the message help your straggling
neighbor. The main aim of the video is to emphasize the need for helping others.
Required:
Explain all the phases you are going to undertake in order to create a quality video that captures
the specified theme.
[10 Marks]
