[aprssig] VOICE Over APRS??
kc6ete@gmail.com
kc6ete at gmail.com
Tue Sep 21 13:23:03 EDT 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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