1
Q
What is the forward likelihood in probability?
A
The joint probability
It is represented mathematically as P(a + -1 (N) | at -1 (i) bj (ot) aNj aij alj a, () a -1 (1)).
2
Q
What does the backward likelihood represent?
A
The conditional probability
It is mathematically expressed as B+ (j) = P (of+1|at = j,1).
3
Q
What is the formula for backward likelihood?
A
B+ +1 (N) B + (i) aiN aij ail b; (ot+1) Bt+1 (i) by(ot+1)
This formula illustrates the relationship between the backward likelihood and the observed data.
4
Q
What is the first step in the forward procedure?
A
aj (i) = T¡bil
This step initializes the forward procedure for t.
5
Q
In the forward procedure, what is calculated for t = 2,3?
A
a”(i) =
This indicates the iterative calculation for subsequent time steps.
