FIELD: computer technology for digital processing of voice information.
SUBSTANCE: spectral analysis is carried out by analysing multi-frequency periodic signals represented by digital samples using compensation of cross products. For several positions of the sliding window, based on the results of the analysis of the values of the interference parameters, threshold values are set for the powers and number of detected spectral components, as well as for the average value of the powers of the spectral components of the interference. For sliding window positions for which a signal may be present, the average number of detected components is calculated. If this number exceeds the corresponding threshold, then the signal duration is calculated. If the signal duration exceeds the minimum threshold value and does not exceed the maximum threshold value, then the average value of the powers of the spectral components of the mixture of speech signal and noise is calculated. If this value exceeds the threshold, then a signal is considered to be present in these sliding windows. Otherwise, it is decided that there is only interference in these time slots.
EFFECT: increasing the accuracy of speech and pause separation in the presence of interference with rapidly changing power.
1 cl, 3 dwg, 1 tbl
