Patent ID: 7813928
Filing Date: 2010-10-12
Classification: G10L

Abstract:
1. A speech recognition device that recognizes uttered speech and presents a result of the recognition of the uttered speech, the speech recognition device comprising: a speech recognition word storage unit operable to define a vocabulary for speech recognition and operable to store the vocabulary for speech recognition as a plurality of registered words; a speech recognition unit operable to check the uttered speech against the plurality of registered words stored in said speech recognition word storage unit; a reference similarity calculation unit operable to search for a sequence having a highest similarity to the uttered speech, and operable to calculate a reference similarity regarding the sequence, the sequence being a combination of acoustic units, which are subwords; an unregistered word judgment unit operable to judge whether the uttered speech is one of (i) a registered word of the plurality of registered words stored in said speech recognition word storage unit, and (ii) an unregistered word, which is not stored in said speech recognition word storage unit, said unregistered word judgment unit performing the judgment by comparing a similarity between the plurality of registered words checked against the uttered speech by said speech recognition unit and the uttered speech with the reference similarity calculated by said reference similarity calculation unit; an unregistered word storage unit operable to store a plurality of unregistered words; an unregistered word candidate search unit operable to search, from among the plurality unregistered words stored in said unregistered word storage unit, for an unregistered word candidate likely to correspond to the uttered speech, based on the uttered speech, said unregistered word candidate search unit performing the search when said unregistered word judgment unit judges that the uttered speech an unregistered word; and a result display unit operable to display a result of the search performed by said unregistered word candidate search unit together with an indication that the uttered speech is an unregistered word.