325xi Wrote: 
> So how "memory drive" makers explain why PC with something like SB isn't
> enough?..

Simple - they don't!

> 
> BTW, redundancy is limited, always. 100% redundancy means a second copy
> of the whole CD. This is why error correction implemented in the
> standard CD player isn't worth much. 
> I remember I read somewhere that CDP has to use interpolation much more
> often then "error correction" exactly due to insufficient redundancy. In
> those cases ability to re-read the same place several times on different
> speeds is much more effective.

I'm not so sure about this - cliveb mentioned he obtained identical
SPDIF bitstreams from an original CD and a CDR copy, which means there
was zero interpolation in both cases.  Also in my own CD ripping I
often get perfect rips at 5x speeds or so - so again, no uncorrectable
errors.  Of course I don't know how many correctable errors there were,
so it's hard to compare.

Another point is that without redundancy (which by the way for CDs is
33% - one error checking byte for every three data bytes), it would be
difficult to know if there had been an error at all - that's part of
the purpose.


-- 
opaqueice
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