Verifying SECDED Codewords

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An example on verifying the SECDED codeword's integrity by recalculating it's checkbits, and generating a syndrome code.
  1. Dr. Shane Oberloier
  2. SECDED
  3. SEC
  4. DED
  5. single error correction
  6. dual error detection
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Комментарии
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thanks for video, i finally got understand this type of code :D

armageddontoday
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First off, I love your videos. They're clear and have helped me. Thanks! That being said, I think your conclusions in this one are incorrect? For example, let's take the codeword you created in "Calculating SECDED Codewords": data=10110011 gives parity=10011 (full codeword=1011100101011). Now, let's flip bit4 in the data to give: 10111011. That parity calcs to 11101. Now, 10011 (xor) 11101 = 01110. In this case, the four hamming parity bits (0111) do correctly mark the position of d4 (position 7). But, the C0 bit (you call it the DED bit here) is zero. You stated that a single-bit error would show up as DED=1. Can you please tell me if I'm missing something? Thanks again :)

jonfolsom