资料来源 : Free On-Line Dictionary of Computing

speech recognition
     
         (Or voice recognition) The identification of
        spoken words by a machine.  The spoken words are digitised
        (turned into sequence of numbers) and matched against coded
        dictionaries in order to identify the words.
     
        Most systems must be "trained," requiring samples of all the
        actual words that will be spoken by the user of the system.
        The sample words are digitised, stored in the computer and
        used to match against future words.  More sophisticated
        systems require voice samples, but not of every word.  The
        system uses the voice samples in conjunction with dictionaries
        of larger vocabularies to match the incoming words.  Yet other
        systems aim to be "speaker-independent", i.e. they will
        recognise words in their vocabulary from any speaker without
        training.
     
        Another variation is the degree with which systems can cope
        with connected speech.  People tend to run words together,
        e.g. "next week" becomes "neksweek" (the "t" is dropped).  For
        a voice recognition system to identify words in connected
        speech it must take into account the way words are modified by
        the preceding and following words.
     
        It has been said (in 1994) that computers will need to be
        something like 1000 times faster before large vocabulary (a
        few thousand words), speaker-independent, connected speech
        voice recognition will be feasible.
     
        (1995-05-05)