BAC1107 DIGITAL PHOTOGRAPHY AND VIDEO EDITING. KCA Past Paper

UNIVERSITY EXAMINATIONS: 2016/2017
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN
APPLIED COMPUTING
BAC1107 DIGITAL PHOTOGRAPHY AND VIDEO EDITING
FULL TIME/PART TIME
DATE: AUGUST, 2017 TIME: 2 HOURS
INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions.

QUESTION ONE
a) Define the term audio editing (2 Marks)
b) Give four differences between analog photography and desktop photography.
(8 Marks)
c) How does a pin-hole camera work (4 Marks)
d) A digital camera has an aspect ratio of 16:9, capacity of 16GB, colour depth of 4 bits. If
the camera can take 800 still photos, calculate its resolution. (8 Marks)
e) You have been contracted to do a documentary for a new dairy company, what essentials
will you have (8 Marks)
QUESTION TWO
a) Explain photo editing (4 Marks)
b) What are the critical success factors in photo editing (6 Marks)
c) For outdoor photo shooting, what the precautions necessary for excellent results
(5 Marks)
d) Discuss how a digital camera has revolutionalised photography in the 21st century
(5 Marks)
QUESTION THREE
a) State reasons why data compression is important in multimedia applications such as
video editing (4 Marks)
b) Demonstrate how Lempel Ziv algorithm works, using a suitable example (6 Marks)
c) Why should you crediting be done in photography and video productions (4 Marks)
d) What are the activities in scripting (6 Marks)
QUESTION FOUR
a) Explain digital watermarking (2 Marks)
b) Distinguish between
i) Firewire and USB cable (4 Marks)
ii) SDTV and HDTV (4 Marks)
iii) Video production and Animation production (4 Marks)
c) Define the following roles
i) Producer (2 Marks)
ii) scriptwriter (2 Marks)
d) An audio file has 16bit stereo, 96khz, 6min duration. Calculate its size in megabytes
(4 Marks)
QUESTION FIVE
a) How much memory is required for an 1200 by 1080 display resolution with thousands of
colors per pixel (16 bit)? [3 Marks]
b) State four factors that are essential in digital recording [ 4 Marks]
c) What is the size of uncompressed sound with CD quality for 1 minute of audio:
[4 Marks]
d) Using Huffman encoding algorithm for a data file that has the following characters
Character A B C D E
Frequency 10 16 19 7 17
i) Give the Huffman tree and code (6 Marks)
ii) Using (i) encode AAEBDEDC (3 Marks)

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