(ham´ing kōd) (n.) In digital data transmissions, a method of error detection and correction in which every string of four bits is replaced with a string of seven bits. The last three added bits are parity-checking bits that the receiving device uses to check for and correct any errors.
Hamming code will detect any double errors but can only correct a single error. This method of error correction is best suited for situations in which randomly occurring errors are likely, not for errors that come in bursts.
Richard Hamming, a theorist with Bell Telephone Laboratories in the 1940s, developed the Hamming code method of error correction in 1949.
- Hardware Compatibility List
Abbreviated as HCL, the Hardware Compatibility List is a list of products maintained by Microsoft that note devices that have been tested for compatibility with Windows Vista or XP. For Windows Vista, devices that have been tested and found to provide the best experience are are marked with logos stating they are “Certified For Windows […]
(adj.) Describes any modem that recognizes Hayes modem commands. Hayes Microcomputer Products is one of the leading manufacturers of modems and has developed a language called the AT command set for controlling modems that has become the de facto standard.
Online documentation. Many programs come with the instruction manual, or a portion of the manual, integrated into the program. If you encounter a problem or forget a command while running the program, you can summon the documentation by pressing a designated Help key or entering a HELP command. In Windows, the Help key is the […]
A higher-quality version of the 8mm videotape format that offers a sharper picture. Hi8 is the successor to the original Video8 format and is an analog format.
Short for High Floppy Disk, a type of high-density floppy disk developed by Sony that can hold 200 MB of data. Like the competing SuperDisk disk drive from Imation, HiFD disk drives can read and write old 1.44 MB floppy disks in addition to the new high-density disks. HiFD drives support data transfer rates of […]