METHOD OF DETECTING AND CORRECTING FALSIFICATIONS OF PHONOGRAMS BASED ON KHURGIN-YAKOVLEV PRESENTATION Russian patent published in 2016 - IPC G06F21/00 G11B27/00 

FIELD: information security.

SUBSTANCE: invention relates to protecting information from unauthorised change of content of audio record, specifically, to protection of audio records of falsifications and recovery of their initial content. Said technical result is achieved using Khurgin-Yakovlev presentation, which implies transmission groups of thinned signal readings and a derivative, shifted relative to each other by means of special delay line for a certain number of samples. Initial voice information in area of falsification of with certain loss of quality is reduced due to possibility of obtaining readings of signal readings derivative.

EFFECT: technical result consists in reduction of mean-square error signal recovery as compared to synthesising filter built based on V.A.Kotelnikov theorem at 40-60 % at equal orders filters, with additional noise-immunity of reconstructed speech signal in comparison with algorithm based on Kotelnikov theorem at 1, 2 -1, 5 dB.

1 cl, 1 dwg