On Sun, 2013-08-25 at 01:08 +0930, Tim wrote: > On that note, it always amazed me that data CDs were ever possible. > For > a start, you can't just lose a bit in your data (or program) and carry > on as if nothing happened, it all has to be precisely correct, and > audio > CDs are continually working through playback errors, all the time the > disc is playing. Checksums can say the data is wrong, but if there's > more than one bit wrong, you couldn't work out what the error actually > was. If it were a simple checksum I'd agree, but in fact they use Reed-Solomon Error Correcting Codes (ECC) which can typically correct burst errors of up to 4000 bits or so essentially on the fly. See http://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction Still pretty amazing though. poc -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
