PSEUDO-SOUND SIGNAL GENERATION DEVICE, ACOUSTIC MODEL APPLICATION DEVICE, PSEUDO-SOUND SIGNAL GENERATION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To improve a recognition rate even when learning data is not sufficiently available to obtain.SOLUTION: A pseudo-sound signal generation unit 12 converts the sound source of an input sound signal on the basis of a conversion rule that expresses the acoustic characteristic of a sound phenomenon whose frequency of appearance is low, and generates a pseudo-sound signal by exciting a spectral envelope extracted from the input sound signal with the sound source. A pseudo-acoustic feature value generation unit 13 extracts an acoustic feature value from the pseudo-sound signal and generates a pseudo-acoustic feature value series. An acoustic model learning unit 14 learns an acoustic model using the pseudo-acoustic feature value series.SELECTED DRAWING: Figure 1