Patent ID: 8738367

Claim:
A speech signal processing device, comprising: a power acquisition unit configured to accept an inputted speech signal and, based on the accepted speech signal, acquire power representing intensity of a speech sound represented by the speech signal; a probability distribution acquisition unit configured to acquire a probability distribution with intensity of the acquired power as a random variable; and a correspondence degree determination unit configured to determine whether a correspondence degree representing a degree of correspondence between the power acquired by the power acquisition unit in a case that a predetermined reference speech signal is inputted into the power acquisition unit and predetermined reference power is higher than a predetermined reference correspondence degree, based on the acquired probability distribution, wherein the correspondence degree determination unit is configured to acquire a distribution distance value that becomes smaller as a degree of correspondence between the acquired probability distribution and a predetermined reference probability distribution becomes higher and, in a case that the acquired distribution distance value is smaller than a preset reference distance value, determine that the correspondence degree is higher than the reference correspondence degree.