DEVICE AND METHOD TO GENERATE SIGNATURE OF ACOUSTIC SIGNAL, DEVICE TO IDENTIFY ACOUSTIC SIGNAL Russian patent published in 2012 - IPC G10L15/00 

FIELD: information technologies.

SUBSTANCE: method to generate a signature of an acoustic signal from signatures of frames, into which the acoustic signal is broken, includes performance of frequency conversion of a digitised acoustic signal of each n (1≤n≤N) frame. At the same time for each frame, amplitude values are converted for all counts of the converted signal into positive ones, for each n frame, starting from (1+t) (where 1≤t≤N), differences are calculated between found positive counts and appropriate positive counts of the previous (n-t) frame, produced differential counts are combined into subgroups, a sum of differential counts of each subgroup is found, subgroups are combined with the same quantity of differential counts into groups, for each group a number of a subgroup is identified with a maximum or minimum sum of differential counts, from the specified numbers of subgroups a signature of n (where (1+t)≤n≤N)) frame of the acoustic signal is generated. Versions are given to implement the device for generation of a signature of an acoustic signal and the device to identify an acoustic signal.

EFFECT: invention provides for high probability of detection of distorted acoustic signals under fixed probability of false detection.

11 cl, 6 dwg