WorksheetsMemory & Storage (image, sound & compression)
Total questions: 10
Worksheet time: 7mins
James is a graphic designer. He has created an icon set of 20 icons for a project. The icons are uncompressed images of 96x96 pixels in 8-bit colour. Explain how the approximate file size can be calculated for the icon set.
96x96
96x96 * 8
96*96 * 8*20
96*96 * 8*20*10%
State how many different colours can be stored using 6-bit colour.
32
64
255
128
MP4 compression is used to store the video clip on the hard disk of the server. State what is meant by the term “compression”. (select all that apply)
makes "stuff" smaller
makes "things" smaller
Reduces the number of bits
makes the file size smaller
Describe two advantages of the streaming service using compression.
The video clip will transfer to the user more quickly
The video clip will transfer to the user more slowly
Requires less storage capacity
Requires more storage capacity
State one potential disadvantage to using compression.
The resolution of the video will be affected.
The file size may be increased
The quality of the video may be reduced.
The video will not be affected.
This type of compression will cause no loss in quality.
(a)
This type of compression will cause a loss in quality.
(a)
State what is meant by the term, “sampling rate”.
The volume of the recording
The wave length of the audio file
the finished mp4 file
Number of samples taken/stored per second.
increasing the sampling rate will... (select 2 answers)
make the file size larger
improve the sound quality
decrease the sound quality
make the file size smaller
The number of bits used to store each sample is know as the what...
binary code
sample rate
bit depth
amplitude
