21. A method of speech dialogue between a human user and a speech dialogue system, comprising the steps of: understanding an input speech from a user; determining a response output according to the input speech; generating a speech response and a visual response according to the response output; and outputting the speech response and the visual response generated to the user.
21. A method of speech dialogue between a human user and a speech dialogue system, comprising the steps of: understanding an input speech from a user; determining a response output according to the input speech; generating a speech response and a visual response according to the response output; and outputting the speech response and the visual response generated to the user. 23. The method of claim 21, wherein the outputting step outputs the speech response and the visual response by controlling at least one of an output order, an output timing, and a visual response output position.