Berkeley CSUA MOTD:Entry 24828
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2025/07/10 [General] UID:1000 Activity:popular
7/10    

2002/5/14-15 [Computer/SW/Languages/Java] UID:24828 Activity:kinda low 75%like:24824
5/14    The (12,8) FEC hamming code has the following 4 correcting bits:
        (format is D8,D7,D6,D5,P4,D4,D3,D2,P3,D1,P2,P1)
        P1 = sum(D1,D2,D4,D5,D7) mod 2
        P2 = sum(D1,D2,D6,D7) mod 2
        P3 = sum(D2,D3,D4,D8) mod 2
        P4 = sum(D5,D6,D7,D8) mod 2.
        How does one derive that? I have (15,11) and (7,4) perfect code
        examples but I don't get how the parity bits are calculated. Thx.
        \_ what class is this?
2025/07/10 [General] UID:1000 Activity:popular
7/10    

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