METHOD FOR EXTRACTING VOICE CHARACTERISTIC SUITABLE FOR CORE WORD DETECTION IN NOISE CIRCUMSTANCE

摘要

PURPOSE: A method for extracting voice characteristics is provided to be suitable for a core word detection in a noise circumstance. CONSTITUTION: In a method for extracting voice characteristics, if voice is input(ST1), a spectrum slope of the input voice is leveled, and, after suppressing an operating range of the signal, a pre-emphasis for increasing a signal-to-noise ratio is performed(ST2). A window function is multiplied with the pre-emphasized signal(ST3), and then a synthesis sound is obtained by passing the multiplied signal through a filter. A cap stream analysis is performed in order to obtain a local average from the synthesis sound(ST5), and distortion owing to a noise is compensated by the local average of the cap stream(ST7).