NLP, Naturallanguageprocessing, Deep Learning, Machine Learning, Artificial Intelligence.
For the first observation, ψ[i][1] is simply i, because there is only one state i. For subsequent observations, ψ[i][t] is the state j such that δ[j][t-1] * A[j][i] * P(ot|i) is the maximum over all possible states j. This means that the state j that contributes most to the maximum probability of