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Sylvain Munaut 246tnt at gmail.com> 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: conv_tch_afs.c Type: text/x-csrc Size: 15081 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20120726/47f41dc4/attachment.bin> -------------- next part -------------- A non-text attachment was scrubbed... Name: conv_tch_afs.h Type: text/x-chdr Size: 625 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20120726/47f41dc4/attachment-0001.bin>