Mercurial > hg > camir-aes2014
view toolboxes/FullBNT-1.0.7/bnt/inference/online/@hmm_2TBN_inf_engine/back.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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function b = back(engine, bfuture, f, t) if f.t ~= t error('mixed up time stamps') end b.t = t; b.obslik = f.obslik; bb_future = bfuture.beta .* bfuture.obslik; if engine.maximize B = repmat(bb_future(:)', length(bfuture.beta), 1); b.beta = normalise(max(engine.transprob .* B, [], 2)); else b.beta = normalise((engine.transprob * bb_future)); end b.gamma = normalise(f.alpha .* b.beta); if t > 1 bb_t = b.beta .* b.obslik; b.xi = normalise((engine.transprob .* (f.past_alpha * bb_t'))); % t-1,t end