19. The computer-readable storage device of claim 15 , wherein applying the unscented transformation framework to the speech feature vectors to determine static distorted speech parameters and dynamic distorted speech parameters comprises: determining a static transformed mean utilizing a non-linear function corresponding to the speech in the utterance, the static transformed mean comprising a static transformed speech feature mean vector; and determining a static transformed variance, the static transformed variance comprising a static transformed speech feature variance, the static transformed speech feature variance comprising elements of a diagonal covariance matrix, utilizing the non-linear function corresponding to the speech in the utterance.
20. The computer-readable storage device of claim 19 , wherein applying the unscented transformation framework to the speech feature vectors to determine static distorted speech parameters and dynamic distorted speech parameters further comprises: determining a dynamic mean utilizing the non-linear function corresponding to the speech in the utterance; and determining a dynamic variance utilizing the non-linear function corresponding to the speech in the utterance.