[Gta04-owner] Speex echo cancelation now working?

Belisko Marek marek.belisko at gmail.com
Fri Mar 30 13:51:53 CEST 2012

On Fri, Mar 30, 2012 at 1:21 AM, Radek Polak <psonek2 at seznam.cz> wrote:
> Hi,
> i think i have fixed speex echo cancellation in gsm voice routing program.
> It's now pushed on github:
>        https://github.com/radekp/gta04-gsm-voice-routing
Nice work. I'm gta04 owner just from yesterday but isn't there any way to use HW
echo cancellation in modem somehow. This is just newbie question. I
browse free runner
wiki and there are modem command to enable echo cancellation.

> You can compile it on GTA04 [1]. Copy it then to /opt/qtmoko/bin or manually
> start during call. So far all looks good - I have now quite loud volume and
> the other side hears echo no more. Maybe some params can be tuned, i just
> guessed filter_length and you can do even better cancellation with:
> speex_preprocess_ctl(preprocess_state, SPEEX_PREPROCESS_SET_ECHO_STATE,
> echo_state);
> Btw it's documented here [2].
> So happy GSM calling,
> Radek
> [1] apt-get install build-essential libspeexdsp-dev
> [2] http://www.speex.org/docs/manual/speex-manual/node7.html
> _______________________________________________
> Gta04-owner mailing list
> Gta04-owner at goldelico.com
> http://lists.goldelico.com/mailman/listinfo/gta04-owner



as simple and primitive as possible
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
Tel: +421 915 052 184
skype: marekwhite
twitter: #opennandra
web: http://open-nandra.com

More information about the Gta04-owner mailing list