comparison toolboxes/FullBNT-1.0.7/bnt/examples/dynamic/HHMM/add_hhmm_end_state.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function A = add_hhmm_end_state(transprob, termprob)
+% ADD_HMM_END_STATE Combine trans and term probs into transmat for automaton with an end state
+% function A = add_hhmm_end_state(transprob, termprob)
+%
+% A(i,k,j) = Pr( i->j | Qps=k), where i in 1:Q, j in 1:(Q+1), and Q+1 is the end state
+% This implements the equation in sec 4.6 of my tech report, where
+% transprob(i,k,j) = \tilde{A}_k(i,j), termprob(k,j) = \tau_k(j)
+%
+% For the top level, the k index is missing.
+
+Q = size(transprob,1);
+toplevel = (ndims(transprob)==2);
+if toplevel
+  Qk = 1;
+  transprob = reshape(transprob, [Q 1 Q]);
+  termprob = reshape(termprob, [1 Q]);
+else
+  Qk = size(transprob, 2);
+end
+
+A = zeros(Q, Qk, Q+1);
+A(:,:,Q+1) = termprob';
+
+for k=1:Qk
+  for i=1:Q
+    for j=1:Q
+      A(i,k,j) = transprob(i,k,j) * (1-termprob(k,i));
+    end
+  end    
+end
+
+if toplevel
+  A = squeeze(A);
+end