The following is a Hamming 7-4 code of two ACSII letters. There is one error in

Question

The following is a Hamming 7-4 code of two ACSII letters. There is one error in the code. Find and correct the error and list coded letters. the left is the orginal code word and the right is the hamming coded equivalent.

0100=1001100
0010=0101010
0100=1001100
0101=1100101

Explanation / Answer

The original input was 2 letters each consisting of 8bits ASCII code. The first 8 => 0100 0010 = hex 42 = B The 2nd 8 => 0100 0101 = hex 45 = E The last 7-4 code appears to be incorrect. The hamming 7-4 code for 0101 should be 0100101 Therefore the last line should be: 0101 = 0100101 the parity bits are incorrect on that line.

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