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* "Alan Dowds" <[EMAIL PROTECTED]> on Sun, 16 Jan 2000
| All this discussion about optical cables has got me thinking. Why use an
| optical cable for digital audio connections at all?
Practicality: optical jacks are significantly smaller than the RCA jacks
digital coax uses, making it a preference for portable equipment.
| I know they are impervious to electromagnetic interference, but is that
| really such a problem in a cable less than a metre long? And since the
| transmission is digital, is the lack of interference so crucial? My
| computer, which transmits loads of data down SCSI, IDE, even parallel and
| phone cables, gets by fine with plain old wires.
Computer information protocols have "retry on error" mechanism. S/P-DIF
does not. Either you have a sufficiently "clean" connection for data, or
you get nothing at all. TOSlink does not provide error correction per se;
it provides a connection that does not require error correction.
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