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How can analog quality possibly be better than digital?
"Sawfish" wrote in message
news 
On Sat, 08 Nov 2003 18:39:44 GMT, (Stewart
Pinkerton) wrote:
range. For telephony, a sampling rate of 12k samples/sec at 8 bits is
more than adequate - and very far from 'infinite', being about 1/12 of
the standard 'Red Book' CD information density.
In addition to this, digital telephony uses lossy compression, but
that's a whole other can of worms, and doesn't seem to worry people
using MP3 players.
Digital telephony when referring to the central office switch (what
every POTS line connects to) uses a sample rate of 8 KHz, and doesn't
use any compression. Digital cell phones do use compression, which
accounts for the crappy voice quality (and a total hosing of Musak).
Joe
The central office 8kHz sample rate signals do use non-linear coding
to get compression, see A-law or u-law (Greek letter 'mu') coding
(pun intended ;-).
Regards
Ian
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