file types/compression

Question 1

WAV

Answer 1

Wave audio file

audio types

uncompressed/lossless

identical to original sound

file size is high

Question 2

MP3

Answer 2

motion picture expert group 3

audio

lossy compressed

quality is good - designed so user doesn’t notice any differences (removes quieter of 2 similar sounds and removes frequencies out of human hearing

file size is reasonably low

Question 3

Lossy

Answer 3

sacrfices quality for a smaller file size

Question 4

lossless compresses

Answer 4

compresses without using quality

Question 5

PNG

Answer 5

lossless compressed

animation is not possible

transparency: individual pixels can have their level of transparency set

colour depth: 24bit

Portable Network Graphic

Question 6

GIF

Answer 6

lossless (limited colour depth)

animation is possible

transparency: pixels are either transparent or not

colour depth: 8 bit

Graphics Interchange Format

Question 7

JPEG

Answer 7

lossy compressed

animation is not posssible

transparency - not possible

colour depth: 24 bit

Joint Photographic Expert Group