Mercurial > hg > camir-aes2014
view toolboxes/FullBNT-1.0.7/bnt/examples/dynamic/HHMM/remove_hhmm_end_state.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 [transprob, termprob] = remove_hhmm_end_state(A) % REMOVE_END_STATE Infer transition and termination probabilities from automaton with an end state % [transprob, termprob] = remove_end_state(A) % % 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 footnote 3 of my NIPS 01 paper, % 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(A,1); toplevel = (ndims(A)==2); if toplevel Qk = 1; A = reshape(A, [Q 1 Q+1]); else Qk = size(A, 2); end transprob = A(:, :, 1:Q); term = A(:,:,Q+1)'; % term(k,j) = P(Qj -> end | k) termprob = term; %termprob = zeros(Qk, Q, 2); %termprob(:,:,2) = term; %termprob(:,:,1) = 1-term; for k=1:Qk for i=1:Q for j=1:Q denom = (1-termprob(k,i)); denom = denom + (denom==0)*eps; transprob(i,k,j) = transprob(i,k,j) / denom; end end end if toplevel termprob = squeeze(termprob); transprob = squeeze(transprob); end