ECC & BCJR 

Unfortunate that there's no discussion, since the explanation of BCJR & viterbi, when applied in the digital domain, is considerably easier to understand than the HMM version given here.  Unfortunately, the BCJR article is currently a stub with no content in it -(  Anyway, just to make this article easier to understand, I think its important to expand on these other, easier-to-explain, easier-to-comprehend algorithms. 99.153.64.179