2.5 COMPRESSION (lossy, lossless)

Question 1

what is lossy compression?

Answer 1

using an algorithm to analyse a file and remove data that cannot be seen or heard by humans
further lossy compression removes data that humans can see / hear
lossy compression removes data permanently, cannot return to the original form

Question 2

what is lossless compression?

Answer 2

reduces the size of a file without permanently removing any data
removes non essential metadata