Automatic text independent speaker identification system is intended for automatic identification of a speech signal of unknown voice by comparing with "speaker cards", existing in the database of system. "Speaker card" means the structure of data, containing complete information about the given speaker (first and last name, births date, sex and etc) and its individual particularities of voice, including samples of sound files with its voice.Designed algorithm of voice identifications is based on duel comparison spectra features of unknown speaker with the features of speaker card from the database system. Spectra features are calculated with provision of dynamic determinations of channel distortion level and external hindrances. It allows to compensate channel distortion and influences of external hindrances with comparing spectra features, put into the original speech signal. Sensitivity to identifications is defined by the level of installing the thresholds of probability of errors 1-th (False Rejection Rate (FRR)) and 2-th (False Acceptance Rate (FAR)) sort. Possibility of regulation of thresholds of FRR and FAR allows to adjust a process of identification flexibly in accordance with system safety requirements.
Automatic text independent speaker identification system |