# Hidden Markov model

> A hidden Markov model (HMM) is a Markov model in which the observations are dependent on a latent (or hidden) Markov process (referred to as $\displaystyle X$).

A hidden Markov model (HMM) is a <Markov model> in which the observations are dependent on a latent (or hidden) <Markov process> (referred to as $\displaystyle X$).