Read error correction in software
cclist at sydex.com
Wed Jul 25 23:16:34 CDT 2007
On 25 Jul 2007 at 20:43, dwight elvey wrote:
> If you take the calculated crc with the recorded crc, it can be
> played backwards. When you get close, the end numbers in your
> CRC back calculator will be zeros and the bits in the middle will
> be the error mask.
I'd thought of that, but most of the error sectors have more than a a
single error (the content is mostly ASCII, so single bit errors are
easy to correct by inspection). Multiple MFM errors, what with bit
and clock/data phase shifting etc. just don't seem to be amenable to
that sort of approach. Maybe I'm missing something...
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