Group 12 - Hamming Codes Joseph Lorich Tommy Williams...

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Unformatted text preview: Hamming Codes Joseph Lorich Tommy Williams History  Created by Richard Hamming  Originally published in 1950  Developed to aid in error detection and correction Richard Hamming History  He was Inspired while working on the Bell Model V  Previously, errors were detected and then had to be manually corrected  This was time consuming and only available when people were around to fix them. He wanted an alternative that was human- independent. Richard Hamming What is a Hamming Code?  A special code that represents data and can provide  Error Detection  Error Correction How They Work  Hamming Codes are created by encoding data in a special format  Extra bits are needed to allow for detection/correction  Encoded words of data are called codewords  These code words are then stored/sent and decoded by the reader/receiver Example Dataword Codeword 00 00000 01 01011 10 10101 11 11110 Here we are converting 2 bit data words to 6 bit codewords Each word in a set of data gets converted to a code word. The codewords are then transmitted. Example Somewhere in transmission an error occurs and a bit is changed 010011 -> 0100 1 Example  The received codeword is then compared to the original table and it is determined that an error occurred....
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This note was uploaded on 07/24/2011 for the course EEL 3531 taught by Professor Llewelyn during the Spring '09 term at University of Florida.

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Group 12 - Hamming Codes Joseph Lorich Tommy Williams...

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