HIGH-RESOLUTION POST-PROCESSING METHOD FOR VOICE DECODER Russian patent published in 2003 - IPC

FIELD: voice decoders for radio receivers of systems communicating with mobile objects. SUBSTANCE: method includes following operations: decoded time-domain signal is transformed into frequency-domain signal by means of high-resolution frequency transform (fast Fourier transform), energy distribution of mentioned frequency-domain signal is analyzed throughout its entire frequency area to detect disturbing frequency components and assigning priority to frequency components residing in upper part of frequency spectrum; degree of suppression of mentioned disturbing frequency components is found basing on mentioned assignment of priority; post-filtering of mentioned transform is controlled depending on mentioned residence , and inverse transformation is made to obtain decoded time-domain voice signal subjected to post-filtration. EFFECT: reduced unwanted impact of inharmonic components and other coding noise in decoded-frequency spectrum. 10 cl, 4 dwg