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[aprssig] VOICE Over APRS??

kc6ete@gmail.com kc6ete at gmail.com
Tue Sep 21 17:23:03 UTC 2010


Would not be hard to use a speakjet for this..

Sent from my HTC on the Now Network from Sprint!

----- Reply message -----
From: "Stephen H. Smith" <wa8lmf2 at aol.com>
Date: Tue, Sep 21, 2010 10:36 am
Subject: [aprssig] VOICE Over APRS??
To: "TAPR APRS Mailing List" <aprssig at tapr.org>

  I'm only HALF joking.....


 From today's Slashdot.org:

<http://news.slashdot.org/story/10/09/21/0428259/Codec2-mdash-an-Open-Source-Low-Bandwidth-Voice-Codec>


Bruce Perens <http://bruceperenscom/> writes /"Codec2 is an Open Source digital 
voice codec for low-bandwidth applications 
<http://www.rowetel.com/blog/?page_id=452>, in its first Alpha release. 
Currently it can encode 3.75 seconds of clear speech in 1050 bytes, and there 
are opportunities to code in additional compression that will further reduce 
its bandwidth. The main developer is David Rowe <http://www.rowetel.com/>, who 
also worked on Speex <http://www.speex.org/index.shtml.en>. Originally designed 
for Amateur Radio, both via sound-card software modems on HF radio and as an 
alternative to the proprietary voice codec presently used in D-STAR 
<http://en.wikipedia.org/wiki/D-STAR>, the codec is probably also useful for 
telephony at a fraction of current bandwidths. The algorithm is based on papers 
from the 1980s, and is intended to be unencumbered by valid unexpired patent 
claims. The license is LGPL2. The project is seeking developers for testing in 
applications, algorithmic improvement, conversion to fixed-point, and coding to 
be more suitable for embedded systems."

/Full story at the link above.  Apparently, it will be demoed at the upcoming 
TAPR DCC .


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Stephen H. Smith    wa8lmf (at) aol.com
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