Waseda University

Oki Electric Industry Co., Ltd.

Tetsunori Kobayashi

Kenzo Akagiri

Kei Yamada

Makoto Morito

Takashi Yazu

Satoshi Kanba

Tetsuji Ogawa

In a source sound separator, first and second target sound predominant spectra are generated respectively by first and second processing operations for linear combination for emphasizing the target sound, using received sound signals of two microphones arrayed at a distance from each other. A target sound suppressed spectrum is generated by processing for linear combination for suppression of the target sound, using the two received sound signals. Further, a phase signal containing a larger amount of signal components of the target sound and exhibiting directivity in the direction of the target sound is generated by processing of linear combination, using the two received sound signals. The target sound and the interfering sound are separated from each other using the first and second target sound predominant spectra, the target sound suppressed spectrum, and the phase signal.

Source sound separator with spectrum analysis through linear combination and method therefor

The invention provides a sound source separation system, a sound source separation method, and an acoustic signal acquisition device which can precisely separate a target sound and a disturbance sound coming from an arbitrary direction, and which ensures miniaturization of a device. A sound source separation systemcomprises two microphonesdisposed side by side in a direction in which a target sound comes from, a target sound superior signal generatorwhich performs a linear combination process for emphasizing the target sound, using the received sound signals of the microphones to generate a target sound superior signal, a target sound inferior signal generatorwhich performs a linear combination process for suppressing the target sound, using the received sound signals of the microphones, to generate a target sound inferior signal, and a separation unitwhich separates the target sound and a disturbance sound, using a target sound superior signal spectrum and a target sound inferior signal spectrum.

Sound source separation system, sound source separation method, and acoustic signal acquisition device

Growing community of inventors

Tokyo, Japan

Tetsunori Kobayashi