 The size of this set depends on the nature of the observed variable.For example, if the observed variable is discrete with possible values, governed by a categorical distribution, there will be formula_26 separate parameters, for a total of formula_27 emission parameters over all hidden states.On the other hand, if the observed variable is an -dimensional vector distributed according to an arbitrary multivariate Gaussian distribution, there will be parameters controlling the means and formula_28 parameters controlling the covariance matrix, for a total of formula_29 emission parameters.