1.2.5 Flashcards
1
Q
compression
A
reducing the size of a file so that it takes up less storage
2
Q
Why do we need compression?
A
-graphic and audio files can be very large
-millions of images and video files are uploaded everyday
3
Q
benefits of compression
A
-uses less internet bandwidth
-increases transfer speed
4
Q
types of compression
A
-lossy
-lossless
5
Q
lossless
A
compresses the file whilst not loosing data
6
Q
benefits of lossless compression
A
-nothing is lost
-looks for redundant data
7
Q
lossy
A
compressed by removing some data
8
Q
disadvantages of lossy compression
A
-irreversible
-original can not be recovered
-can only be used for image and audio
