10. The method of claim 9, wherein step (b) comprises the steps of: (I) updating said one or more output probability distributions; (II) updating said one or more mixture coefficients; and (III) updating state transition probabilities.
10. The method of claim 9, wherein step (b) comprises the steps of: (I) updating said one or more output probability distributions; (II) updating said one or more mixture coefficients; and (III) updating state transition probabilities. 12. The method of claim 10, wherein said step (II) comprises the step of updating mixture coefficients according to an equation: ##EQU12## where "s.sub.j " is a state of said hidden markov model, and "g.sub.k " is one of one or more clusters of feature vectors.