20. A method for recognizing a speech pattern as a string of predetermined reference words according to claims 11, 12, 13, 14, 15, 16, 17, 18 or 19 further characterized in that said reference word string generation further comprises selecting a prescribed set of reference words for time registration in each reference word level responsive to the level identification signals.
50. A method for recognizing a speech pattern as a string of predetermined reference words according to claim 20 further characterized in that said speech pattern and reference word acoustic feature signals are Markov derived feature signals.