ATSC has only one FEC parameter compared to DVB-T and ISDB-T, which also have more robust modulation schemes. ISDB-T includes an interleaver that makes it more

ATSC has only one FEC parameter compared to DVB-T and ISDB-T, which also have more robust modulation schemes. ISDB-T includes an interleaver that makes it more resilient to impulsive noise compared to DVB-T. ISDB-T modulation scheme is very interesting. It is comprised of 13 sub-carriers ("segments"), and by spec, one of those can be the "mobile" channel (called 1seg, as it occupies one of the 13 segments and leaves 12 for the main mux). It can have different modulation parameters from the 12 main sub-carriers, so you can make it more robust with less available bandwidth and make the main mux less robust but with more bandwidth. IIRC there are other ways to distribute the ISDB-T segments but I don't remember how out of spec it would be. Most 13-segment receivers (ie, TVs, set-top boxes, some USB adapters) wouldn't care (at least 10 years ago they didn't care) and it would work, though.