Quote:
Originally Posted by JFreak
Yep and even lossy algorithms such as AAC give better results
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True indeed. Then there are "lossless" codecs, also part of the AAC spec where the size of the data is reduced, but not destroyed. So in playback you will get 100% of the original audio data.
This works in a similar way to "zipping" a file. If zip compression destroyed any data programs compressed this way just would not be able to function. It just gets rid of the non-essential data. Its kind of like junk DNA mixed with our regular, usable DNA.
The reason why there is "junk DNA" in our files to begin with is it goes back to how files systems work and how information is stored in a file. Its kind of important to the system in part, but not useful for the actual audio or video itself.