Using , we can derive the third line from the second line, where p D i (x; λ i ) γ i for all i are canceled out.
our hybrid model is constructed by combining discriminative models, Hereafter, let us assume that our hybrid model consists of CRFs for discriminative models, p D i , and HMMs for generative models, p G j , shown in Equation (2), since this paper focuses solely on sequence modeling.