1.3.3 web tech

Question 1

Lossy and lossless compression

Answer 1

lossy
compression reduces the size of a file while also removing some of its information. This
could result in a more pixelated image or less clear audio recording.
lossless compression reduces the size of a file without losing any information.
When using lossless compression, the original file can be recovered from the compressed
version. Something which is not possible when using lossy compression which reduces
the size of the file by completely disregarding some information. For example, audio files
can be compressed lossily by removing the very high or very low frequencies which are
least noticeable to the ear. There’s no way to go from the lossy version of the recording
back to the full version as there’s no record of what the high and low frequencies were.