The invention discloses an activated voiceprint
password security control method and
system under public
background noise. The steps of the method include: activating a recognition module to perform real-time voice monitoring in a common environment, and determining whether a voice
signal needs to activate a
sound source location pickup module; The sound
source localization pickup module receives the sound
source data of the interactive target, and estimates the time
delay difference of arrival; for the time
delay difference of arrival, multiple hyperboloids are constructed in combination with the position of the
microphone array to determine the position of the sound source of the interactive target, and obtain the sound source of the interactive target The voice
signal of the source; the preprocessing module preprocesses the voice
signal of the interactive target sound source; the voiceprint
password recognition module extracts the characteristic parameters of the voice signal, and matches the characteristic parameters with the instruction text of the recording
library. The present invention solves the
power consumption of the
system, locates and picks up the increment of the voice burst under the low signal-to-
noise ratio of other human voices, echoes, and reverberations, and solves the above-mentioned current problems through three safe voice recognition and control operations.