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Group 12 - HammingCodes JosephLorich TommyWilliams History...

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Hamming Codes Joseph Lorich Tommy Williams
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History Created by Richard Hamming Originally published in 1950 Developed to aid in error detection and  correction Richard Hamming
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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
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What is a Hamming Code? A special code that represents data and can provide  Error Detection Error Correction
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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
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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.
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Example Somewhere in transmission an error occurs and a bit is changed 010011 -> 0100 0 1
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Example The received codeword is then compared to the original  table  and it is determined that an error occurred.
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