48. A speech recognition circuit according to claim 47 , wherein each lexical memory stores said lexical tree data structure as an n phone model of words, where n is an integer, and said components comprise n phones.
48. A speech recognition circuit according to claim 47 , wherein each lexical memory stores said lexical tree data structure as an n phone model of words, where n is an integer, and said components comprise n phones. 49. A speech recognition circuit according to claim 48 , wherein each lexical memory stores said lexical tree data structure as a mono phone model of words, and said lexical tree processors use said mono phone models to generate context dependant phone models of words dynamically for use in processing the speech parameters.