Voice signal processing device, voice signal processing method and voice signal processing program

Abstract

Provided are a voice signal processing device, a voice signal processing method and a voice signal processing program which can remove, with a simple circuit configuration, an echo signal included ininput signals from a plurality of microphones. This device 1 includes: an output unit 20 which outputs a reception signal s2; an input unit 30 which collects an echo component and the voice of a speaker from the reception signal, and synthesizes signals respectively input from a plurality of microphones 3 that generate echo signals es according to the echo component and voice signals s1 accordingto the voice of the speaker so as to generate a transmission signal s4; a removal signal generation unit 70 which generates, on the basis of filter coefficients F, a removal signal s5 for removing theecho signals included in the transmission signal; a control unit 50 which calculates the filter coefficients; and a removal unit 80 which generates, on the basis of the transmission signal and the removal signal, an echo removal signal s6, wherein the control unit calculates individual filter coefficients k respectively corresponding to the plurality of microphones and synthesizes the individualfilter coefficients to calculate the filter coefficient.

Description

technical field [0001] The invention relates to a voice signal processing device, a voice signal processing method and a voice signal processing program. Background technique [0002] In recent years, communication conference systems via communication lines such as the Internet, such as telephone conference systems or video conference systems, are often applied to conferences held between physically separated locations. With this type of communication conference system, according to the voice signal received from one of the places (hereinafter referred to as "received signal"), the speaker at the other place outputs the voice and the microphone at the other place collects the voice, which will lead to Echo occurs. [0003] The echo is generally suppressed and eliminated by the echo canceller of the communication conference system. A general echo canceller includes an adaptive filter for generating a cancellation signal for canceling the echo signal based on a received spee...

AI Technical Summary

Problems solved by technology

With this type of communication conference system, according to the voice signal received from one of the places (hereinafter referred to as "received signal"), the speaker at the other place outputs the voice and the microphone at the other place collects the voice, which will lead to echo

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