Path: utzoo!utgpu!watmath!clyde!att!icus!limbic!gil
From: gil@limbic.UUCP (Gil Kloepfer Jr.)
Newsgroups: sci.electronics
Subject: Re: CODECs and voice digitizing
Summary: AT&T Tech Journal
Message-ID: <408@limbic.UUCP>
Date: 5 Dec 88 06:53:00 GMT
References: <184@serene.UUCP>
Reply-To: gil@limbic.UUCP (Gil Kloepfer Jr.)
Organization: ICUS Software Systems, Islip, NY
Lines: 30

In article <184@serene.UUCP> gbell@pnet12.cts.com (Greg Bell) writes:
|>                 o   Also, does anybody have any experience with using CODECs 
|>                     or other chips to digitize speech?  I'd like to be able
|>                     to find some sort of compression technique so that I
|>                     wouldn't need a lot of EPROMs.  But, I'd like to hear
|>                     from anybody who has experimented with digitizing speech.
|>UUCP: { uunet ncr-sd }!pnet12!gbell
|>ARPA: crash!pnet12!gbell@nosc.mil
|>INET: gbell@pnet12.cts.com

I started doing some fooling with voice digitization and ran into some gaps
in my education that I have to brush-up on to help me understand it all :-)

A good source of information can be found in the AT&T Technical Journal,
volume 65, issue 5 (Sept/Oct 1986) entitled "Speech Processing Technology."
Back issues of this can be obtained by calling (800) 432-6600 (this is the
AT&T customer information center).  It has a lot of speech processing
techniques as they apply to telephony, but it also explains a lot about the
mathematical methods used to process sound digitally.

From what I understand, there is a lot of theory behind speech processing
beyond the basic A/D converter and sampling.  It would be interesting to
see a discussion about this on the net, but I'm afraid that I wouldn't have
a whole lot to offer thus far.

--------
Gil Kloepfer, Jr.          U-Net: {decuac,boulder,talcott,sbcs}!icus!limbic!gil
ICUS Software Systems      Voice: (516) 968-6860 [H]   (516) 746-2350 x219 [W]
P.O. Box 1                 Internet:  gil@icus.islp.ny.us
Islip Terrace, NY  11752   "Life's a ...  well, you know..."