11. The computer-readable storage device according to claim 9 , wherein the grammar database includes at least one of a fixed-phrase grammar, an acknowledgement grammar, and a recognition grammar.
11. The computer-readable storage device according to claim 9 , wherein the grammar database includes at least one of a fixed-phrase grammar, an acknowledgement grammar, and a recognition grammar. 13. The computer-readable storage device according to claim 11 , the method further comprising determining a recognition target segment to be divided into utterance by referring to the fixed-phrase grammar.