6. The method of claim 4 , wherein step (g) further comprises the steps of: a) estimating a mean of the super vector using the tied state labels of the training data by averaging over each tied state class; and b) estimating a global mean vector.
8. The method of claim 6 , wherein step (b) is determined using the mathematical equation: μ = ∑ t = 1 T ⁢ y ⁡ ( t ) / T wherein μ represents a global mean vector, T represents a total number of frames of a training data set, and y(t) represents a super vector.