is the Viterbi decode for the AFS provided by Sylvain right?

Akib Sayyed akibsayyed at gmail.com
Sat Feb 23 16:06:56 UTC 2013


Dear Sylvain

In code provided above there is no
*conv_tch_afs_XX_XX_next_term_state* &*
conv_tch_afs_10_2_next_term_state*struct for some of bitrate so its
giving wrong output for convolution
decode.

is it possible to give complete conv_tch_afs.c decode.


On Thu, Jul 26, 2012 at 12:23 PM, Sylvain Munaut <246tnt at gmail.com> wrote:

> >  search some materials, find that the decode method of AFS convolutional
> > code is different from the EFS`, it use RSC, and need SOVA(soft output
> > viterbi algorithm). am i right?
>
> No.
>
> It _does_ use RSC (and the viterbi code in libosmocore supports RSC).
> But that has nothing to do with SOVA and SOVA is _not_ required at
> all.
>
> AFAIK, the AMR code I sent a while is correct. Just to be sure I
> attached the latest version I have. I haven't tested all the modes but
> at least 12.2 and 10.2 should be correct.
>
> Cheers,
>
>     Sylvain
>



-- 
Akib Sayyed
Matrix-Shell
akibsayyed at gmail.com
akibsayyed at matrixshell.com
Mob:- +91-966-514-2243
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