libosmocore viterbi decoder

mad mad at auth.se
Tue Apr 26 16:24:17 UTC 2011


> Yes, they're coming, but there is a _lot_ of tables I have to generate
> / transcribe the polys for all the AMR modes and such :p
> 
> If you just need the XCCH, you can use this :  http://pastebin.com/zdZ29GWF
> (you'll need to fix the osmo_ prefix I added later).

Thanks, but for that mode I already use the code from airprobe. Of course I'm more interested in the ones for AMR, but I can wait. Or try it by myself if I find the time to, what ever succeeds first. :)

> 
> > Regarding the soft input bits to the algo, my guess is when just having
> hard bits you have to simply convert 1 to 127 and 0 to -127 in sbit_t,
> right?
> 
> Actually -127 is 1 and 127 is 0
> 
> This is so that the 7th bit is the hard bit. ( 01111111 = 127 - "0"
> and  10000001 = -127 = "1" )
> 

Ah ok, I see!


Regards,
  Mad




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