12. A speech recognition circuit according to claim 1 , wherein said lexical tree processors are operative to determine and output scores in the processing results during the processing of said speech parameters.
12. A speech recognition circuit according to claim 1 , wherein said lexical tree processors are operative to determine and output scores in the processing results during the processing of said speech parameters. 13. A speech recognition circuit according to claim 12 , wherein said lexical tree processors are operative to prune the processing of the lexical tree in dependence upon the determined scores.