20. The speech recognition system of any one of claims 12 through 15 wherein said speech recognition system implements a connected word speech recognition algorithm based on said plurality of speech recognition models.
20. The speech recognition system of any one of claims 12 through 15 wherein said speech recognition system implements a connected word speech recognition algorithm based on said plurality of speech recognition models. 21. The speech recognition system of claim 20 wherein said algorithm characterizes said speech input as an individual one of said key utterances preceded and/or succeeded by one or more extraneous sounds.