Thats done usingHuffman coding, a fairly normal approach for lossless data compression.
you’ve got the option to read more detail about it in theresearchers paper.
If you do it wrong, you get a lot of mistakes.
The findings could be huge when it comes to storing vast amounts of information for the future.
This is especially important as the amount of information increases over time.
source: www.techworm.net
