> > Christopher Spalding wrote:
> > ... thus the higher quality the media the more
> > likely it is that the reproduction will match the orriginal.
> >
> Simon Barnes replied :
> This does not follow. "Better" quality media MAY experience less errors (or
> may be entirely marketing hype), but as long as the errors are corrected, it
> makes no difference.
I have to disagree I'm afraid Simon. The accuracy to which the original signal
can be reproduced can depend a lot on how robust the error correction is.
Significant deterioration may result in the error correction not being enough to
fully correct the error. Better quality media should also experience fewer
errors, because the reproduction of the original signal will usually be more
accurate. Even in the digital realm, a poor quality disc may result in the
difference between a "1" and a "0" on the disc becoming less clear, making
mis-reads more likely. A lower quality disc (in the case of MO) may also not
react as quickly to the heating from the laser, resulting in some data not being
recorded correctly, or even slight stresses in the disc causing mis-alignment.
Having said all this, error correction on MDs and CDs certainly is very robust,
and is designed to be able to cope with such situations. It is worth noting
however that a good quality disc may last longer in terms of the number of
re-uses it gets before it may start to deteriorate, and by using a disc that can
more accurately reproduce the original data, you negate the need for as much
error corection to take place, thereby almost guaranteeing the signal
reproduction to be faithful in terms of the original. Of courwse such
deterioration would be miniscule compared to the alterations ATRAC makes to the
sound anyway, so it is safe to say that even to the trained ear it would not be
audible.
--
Magic
Location : Portsmouth, England, UK
Homepage : http://www.mattnet.freeserve.co.uk
EMail : mailto:[EMAIL PROTECTED]
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