For HMMs ( footnote 11 ) , Ti is the familiar trellis , and we would like this computation of ti to reduce to the forwardbackward algorithm ( Baum , 1972 ) .
an inequality and associated maximization technique in statistical estimation of probabilistic functions of a markov process
L E Baum
â¢ In many cases of interest , Ti is an acyclic graph .20 Then Tar an 's method computes w0j for each j in topologically sorted order , thereby finding ti in a linear number of â and â operations . For HMMs ( footnote 11 ) , Ti is the familiar trellis , and we would like this computation of ti to reduce to the forwardbackward algorithm ( Baum , 1972 ) . But notice that it has no backward pass .
For HMMs ( footnote 11 ) , Ti is the familiar trellis , and we would like this computation of ti to reduce to the forwardbackward algorithm ( @@CITATION ) .