![]() ![]() If I change a value in a dialog, I often get a notification that I have "changed" something, and a save/update/etc. For example, one feature I find very annoying in many programs is the notion of "change". These are very powerful data recovery codes.Ĭhecksums have many other applications. These can do things like reconstruct a sequence of bytes (sometimes as many as 20 bytes, on typical disks) that are lost due to burst noise, typically a bad spot on the disk. ![]() Possibly the best-known of these is the set of codes called Fire Codes, named after the inventor, whose surname is Fire (I can't find any citations to him handily, so I can't give you more information than this). There are some detailed tutorials out there for those of you who wish to pursue this more deeply. For example, using CRC, swapping two bytes in the message will generate a different checksum because the value computed depends not only on the character value, but also on the position in the message in which the byte occurred.ĭisk drives often use techniques derived from Hamming Codes (named after Richard Hamming, an AT
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |