APPARATUS AND METHOD OF CALCULATING CONTROL PARAMETERS OF ECHO SUPPRESSION FILTER AND APPARATUS AND METHOD OF CALCULATING DELAY VALUE Russian patent published in 2013 - IPC G10L21/02 H04M9/08 G11B20/24 

FIELD: radio engineering, communication.

SUBSTANCE: apparatus (200) for calculating control parameters of a noise filter (210), designed to filter a second audio signal in order to eliminate an echo signal based on a first audio signal, includes a computer (220) having a value determiner (230) for calculating at least one energy factor for a band-pass signal of at least two time-consecutive data units of at least one signal from a group of signals. The computer (220) also includes an average value determiner (250) for determining at least one average value of at least one calculated energy factor for the band-pass signal. The computer (220) also includes a modifier (260) for correcting at least one energy factor for the band-pass signal based on the calculated average value for the band-pass signal. The computer (220) also includes a device for calculating control parameters (270) for the suppression filter (210) based on at least one corrected energy factor.

EFFECT: improved sound quality of acoustic systems owing to suppression of reflected signals in proportion to the noise level.

32 cl, 14 dwg, 2 app