Audio-Technica Corporation

Yuri Jitsukata

Yasuhito Kikuhara

Toru Aikawa

Kazuhiro Onizuka

A sound signal processing device, a sound signal processing method, and a sound signal processing program can remove echo signals included in input signals from a plurality of microphones with a simple circuit configuration are provided. The present deviceincludes an output partthat outputs a reception signal s, an input partthat combines signals input from each of a plurality of microphonesand generates a transmission signal s, wherein the microphonescollect an echo component of the reception signal and voice of a speaker and generate an echo signal es corresponding to the echo component and a sound signal scorresponding to the voice of the speaker, a removal signal generatorthat generates a removal signal sremoving the echo signal included in the transmission signal based on a filter coefficient F, a controllerthat calculates the filter coefficient, and a removal partthat generates an echo removal signal sbased on the transmission signal and the removal signal. The controller calculates individual filter coefficients k corresponding to the respective microphones, and calculate the filter coefficient by combining the individual filter coefficients.

Sound signal processing device, sound signal processing method and sound signal processing program

The present invention provides a sound signal processing device that precisely detects various kinds of noises and that does not block output of voice signals even when detecting noise during the output of the voice signals. The sound signal processing device according to the present invention comprises: an input part; an input signal determination partthat determines whether an input signal from the input part is present; a noise detection partthat detects noise included in the input signal from the input part; an output partthat outputs the input signal as an output signal; an output switching partthat performs switching between an output state in which the output part outputs the output signal and a non-output state in which the output part does not output the output signal; and a control partthat controls the switching performed by the output switching part. The control with the control part for switching includes first control that controls the switching based on a determination result rfrom the input signal determination part and a detection result rfrom the noise detection part, and second control that controls the switching based on the determination result from the input signal determination part. One of the first control and the second control is selected based on a state of the output switching part.

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Kanagawa, Japan

Yuri Jitsukata