23 Sep
2011
23 Sep
'11
5:20 p.m.
Hello Bigsat,
On Fri, 23 Sep 2011 13:49:43 +0200, "Bigsat" <bigsat(a)gmail.com> wrote:
Is it possible to release some part of the code necessary to decode
Tetra voice or give some explaination of Gsmtap usage ?
Just in case, I have sent my "proof of concept" modification
for voice decoding to the authors of Osmocom TETRA for proper
integration a while ago. As far as I am aware the current
source code should be able to decode voice or at least contain
the instructions how to do it (the ETSI reference codec is most
certainly not included for copyright reasons).
Best regards,
Dieter
--
Dieter Spaar, Germany spaar(a)mirider.augusta.de
23 Sep
23 Sep
3:49 p.m.
New subject: play the voice signal ?
Hi,
The instructions to download the ETSI reference codec can be found here:
http://tetra.osmocom.org/trac/wiki/Speech_Codec although I never got it working
completely. There is an output stream but there is no audio data in it. Just (random?)
clicks and pops.
Cheers,
Pepijn
Op 23 sep. 2011, om 15:20 heeft Dieter Spaar het volgende geschreven:
Hello Bigsat,
On Fri, 23 Sep 2011 13:49:43 +0200, "Bigsat" <bigsat(a)gmail.com> wrote:
Is it possible to release some part of the code necessary to decode
Tetra voice or give some explaination of Gsmtap usage ?
Just in case, I have sent my "proof of concept" modification
for voice decoding to the authors of Osmocom TETRA for proper
integration a while ago. As far as I am aware the current
source code should be able to decode voice or at least contain
the instructions how to do it (the ETSI reference codec is most
certainly not included for copyright reasons).
Best regards,
Dieter
--
Dieter Spaar, Germany spaar(a)mirider.augusta.de
24 Sep
24 Sep
3:37 p.m.
New subject: Re[2]: play the voice signal ?
Apart from the codec patches for ETSI codec i cant find any other voice
decoding source code in osmocom-tetra trunk. Neither seems to have
entered you in the AUTHORS file.
FAQ on the site says:
"Can your software actually play the voice signal?
Currently we have no support for that. However, a yet unreleased proof-of-concept version
exists."
Why this secrecy for publishing source to decode unencrypted networks?.
Have osmocom been threatened by the tetra manufacturers?
Would damage sysmocom commercial interests
Just in case, I have sent my "proof of concept" modification
for voice decoding to the authors of Osmocom TETRA for proper
integration a while ago. As far as I am aware the current
source code should be able to decode voice or at least contain
the instructions how to do it (the ETSI reference codec is most
certainly not included for copyright reasons).
Best regards,
Dieter
--
Dieter Spaar, Germany spaar(a)mirider.augusta.de
--
<>
4:24 p.m.
New subject: play the voice signal ?
On 09/24/2011 03:37 PM, Mccauley wrote:
Why this secrecy for publishing source to decode
unencrypted networks?.
Have osmocom been threatened by the tetra manufacturers?
Would damage sysmocom commercial interests
Hi,
sysmocom is building a GSM BTS, right now there is no interest in doing
something commercially with tetra.
We can not integrate the ETSI audio code in our (A)GPL software, the result
would not be freely distributable. From my side I was mostly interested in the
signalling part, or if time would permit try transmitting.
So if you either find a legal way to include the ETSI code at build time, or
preferable write a GPL compatible audio decoder, I think we would be happy to
include it in the git repository.
cheers
holger
4598
days inactive
4599
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3 comments
4 participants
participants (4)
-
Dieter Spaar -
Holger Hans Peter Freyther -
Mccauley -
Pepijn van den Berkhof