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Andrey andrey.osmocom at gmail.comOn 2/16/16, Sylvain Munaut <246tnt at gmail.com> wrote: > It's neither PCM audio, nor raw TCH bits. > > They're the raw codec data ( so 260 bits / 20 ms for FR codec ). > > I say they're not the raw TCH bits because the DSP is still doing all > the channel coding / error correction and this process is codec > specific. The bits will be re-ordered and some of them will be > protected by ECC and some won't because the channel coding excpect to > find GSM FR codec bits there. What you just described is exactly what I need - awesome! Now I need to study the implementation code in both layer1 and layer23 and understand how it works - any pointers? Thanks a lot for the help!