METHOD FOR NARRATOR-INDEPENDENT RECOGNITION OF SPEECH SOUNDS Russian patent published in 2004 - IPC

FIELD: voice recognition technology.

SUBSTANCE: method includes segmentation of voice signal with time, determination of periodicity of each sound segment for comparing sound segment with certain type of voice sounds, determination of amplitude and frequency of each of first three formants in spectrum of sound segment in form of informative indications, integration of these indications for each sound segment, phoneme recognition of each sound segment by means of comparing its integral values, taking decision relatively to recognized voice sound and its representation in form of letter marking. Comparing of sound segment is performed to voice, noise and voice-noise types of sounds of speech, main segmentation of voice signal is performed at three main modes, at phoneme recognition integral values of informative indications of each sound fragment are compared dependent on number of formants in sound segment, time intervals of speech sounds are set dependent on change of phoneme belonging of sound segment, after which said decision is taken relatively to recognized sound of speech.

EFFECT: higher probability of correct recognition of speech sounds which form words.

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