FEC (0) basically adds extra information that can be used to fix errors. A simple scheme is to just duplicate all the info (like a backup), but there are much m

FEC (0) basically adds extra information that can be used to fix errors. A simple scheme is to just duplicate all the info (like a backup), but there are much more clever schemes which are much more efficient. [0] https://en.wikipedia.org/wiki/Forward_error_correction https://en.wikipedia.org/wiki/Forward_error_correction