12. A non-transitory computer readable storage medium comprising a computer readable program for constructing a speech recognition model, being configured to cause a computer to execute all the steps of the method according to claim 1 .
12. A non-transitory computer readable storage medium comprising a computer readable program for constructing a speech recognition model, being configured to cause a computer to execute all the steps of the method according to claim 1 . 13. A speech recognition apparatus for performing speech recognition based on a speech recognition model, the speech recognition model being constructed by the computer system according to claim 12 , comprising: an input section adapted to accept input of speech to be recognized; and a speech recognition section adapted to output recognition results while discriminating a simultaneous speech segment in the speech to be recognized, based on the speech recognition model.