14. The emotion detecting apparatus according to claim 13 , wherein the emotional state probability processing means comprises: an audio feature appearance probability calculating means for calculating the audio feature appearance probability that the audio feature vector appears on condition of sequences of the predetermined emotional states using a first statistical model as one of the one or more statistical models; an emotional state transition probability calculating means for calculating the probability of temporal transition of sequences of the predetermined emotional states as the emotional state transition probability using a second statistical model as another one of the one or more statistical models; and an emotional state probability calculating means for calculating the emotional state probability based on the audio feature appearance probability and the emotional state transition probability.
13. An emotion detecting apparatus that performs an emotion detecting processing based on an audio feature of input audio signal data, comprising: an audio feature extracting means for extracting, as an audio feature vector, one or more of a fundamental frequency, a sequence of a temporal variation characteristic of the fundamental frequency, a power, a sequence of a temporal variation characteristic of the power, and a temporal variation characteristic of a speech rate from the audio signal data for each analysis frame, and storing the audio feature vector in a storage part; an emotional state probability processing means for reading the audio feature vector for each analysis frame and calculating the emotional state probability on condition of the audio feature vector for sequences of predetermined emotional states corresponding to one or more types of emotions using one or more statistical models constructed based on previously input learning audio signal data; an emotional state determining means for determining the emotional state of a section including the analysis frame based on the emotional state probability; and an information outputting means for outputting information about the determined emotional state.