On Sun, 09 Nov 2003 00:00:05 GMT, Sawfish wrote:
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).
The original post was referring to cordless handsets - which does of
course include cell phones. Lossy compression is often sonically
transparent, it all depends on how much you need to lower the bitrate.
--
Stewart Pinkerton | Music is Art - Audio is Engineering