PROBLEM TO BE SOLVED: To provide a substitution technique for judging whether or not a new vocabulary word resembles an existing vocabulary word in such degree that they can be confused. SOLUTION: A training system includes a system which compares a new model with each existing model, and it is secured that a warning is given to a user when a new word which acoustically resembles as existing vocabulary word and may be mistaken is added in the training mode. This model comparison system uses a measure of a variance between expressions of training speech related to the new word and uses it for calculation.
SIGNAL PROCESSING SYSTEM