ACOUSTIC ECHO SUPPRESSING DEVICE AND FRONT-END CONFERENCE CALL DEVICE Russian patent published in 2014 - IPC G10L21/02 H04M9/08 

FIELD: physics, acoustics.

SUBSTANCE: invention relates to acoustic echo suppressing means. An acoustic echo suppressor includes an input interface (230) means for extracting a downmix signal (310) from an input signal (300) which contains downmix (310) and overhead parametric information (320), collectively representing a multichannel signal; and also includes a computer (220) for calculating transmission factors of an adaptive filter (240) based on the downmix signal (310) and a microphone signal (340) or a signal derived from a microphone signal; and an adaptive filter (240) for a microphone signal (340) or a signal derived from a microphone signal, using assigned transmission factors for suppressing echo excited by a multichannel signal in the microphone signal (340).

EFFECT: reduced computational complexity and high efficiency of the acoustic echo suppression process.

15 cl, 10 dwg