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2 Comparing Check Digit Methods
CODING FOR ERROR CORRECTION
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addition modulo adjacent transposition errors adjoin a check airline method ASCII CODE ASCII encoding scheme average codeword length binary number system binary representation catch all single check digit formula check digit method Codes and Coding codewords of length column matrix digit formula check error has occurred error occurred fixed length code fixed length encoding following check digit formula check digit freq(A freq(C Hamming codeword Hamming distance Hamming encoding scheme Hamming matrix Hamming's method HUFFMAN CODE Huffman encoding scheme instantaneous encoding schemes International Standard Book ISBN method length encoding scheme MATH IS FUN mathematics modulus nearest neighbor decoding number of l's odd number parity check bit parity check method personal computers positions will single positions will transposition prefix property prime number received word relatively prime remainder obtained single digit errors source alphabet source symbols Theorem ticket number uniquely decipherable United Parcel Service Universal Product Code UPC method words of length