11. The method of claim 10 wherein determining the minus count value for a subject count includes the step of: (r) determining a minus cumulative count value for each probability item in the incorrect word baseform, the minus cumulative count value being based on the outputs generated in response to the utterance of the known subject word and corresponding to a specific transition .tau..sub.i being taken from a specific state S.sub.j at all label interval times t in the word model of the selected incorrect word, where the probability items have previously defined values.
12. The method of claim 11 wherein step (r) includes the step of: (s) applying the forward-backward algorithm to the word model for the selected incorrect word based on the outputs generated in response to the utterance of the known subject word to determine minus cumulative count values.