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LPC for speech (fwd)
Forwarded message:
From [email protected] Fri Dec 10 14:46:07 1993
From: Jeffrey Wayne Porter <[email protected]>
Message-Id: <[email protected]>
Subject: LPC for speech
To: [email protected] (Jeremy Porter)
Date: Fri, 10 Dec 1993 14:45:49 -0600 (CST)
X-Mailer: ELM [version 2.4 PL22]
Content-Type: text
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Did you know that using LPC (linear predictive coding) on speech can
near-telephone quality at only 8 k BITs/second? With a signficant
decrease in quality (but still very understandable... probably better
than radio) you can get the rate down to 2kbps. If you don't mind
sounding like a speak&spell, you can go to 600bps or less.
Using LPC, you could send real-time voice over the
internet. It would even work (maybe just barely) over a SLIP
connection. According to my professor, LPC can be implemented
in a simple DSP chip, so I figure a 486 ought to be able to
handle it, too. Sound like an interesting (granted maybe not
too useful) project? It would be a way of providing secure
voice communications -- LPC code the speech, encrypt the data
stream, transmit via v.32bis modem, etc.
--
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Jeff Porter
[email protected] TA: ECE 290..."ph Jeff Porter" for office hours
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Jeremy Porter ------------- Systems Engineering --------
Dell Computer Corp. ------ [email protected] ----
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