AMR Implementation for Osmocom-BB

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Akib Sayyed akibsayyed at
Fri Oct 25 06:32:36 UTC 2013

I am using TSM30 code for reference.
Steps i Followed :

   - get multirate config from RR layer
   - pass them to l23 api
   - set sync_amr =1 : to tell dsp multirate config are ready in ndb
   - load multirate config into ndb.amr_config

I am able to send uplink properly and can hear on other side.

but about downlink i here only random noise with gliches.

On Fri, Oct 25, 2013 at 2:09 AM, Michael Spacefalcon <
msokolov at> wrote:

> Akib Sayyed <akibsayyed at> wrote:
> > I am trying to implement AMR codec for osmocom-bb.
> Doesn't AMR support require applying some DSP code patches?
> Locating the DSP patch bits within a binary fw image read out of C1xx
> or whatever would probably be an incredible pain, but you can use this
> source/object mixed version instead:
> If you download ti-libs-extract.tar.bz2 from the above, you'll find
> all DSP patches in various *.obj modules in the l1_ext subdirectory
> inside that tarball.  The names of the little individual object modules
> in that bunch are quite descriptive.  The object format is TI's variant
> of COFF; you will need this patch to GNU Binutils in order to grok
> these objects:
> Enjoy!
> Viva la Revolucion,
> SF

Akib Sayyed
akibsayyed at
akibsayyed at
Mob:- +91-966-514-2243
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