公开(公告)号：US20180137876A1

公开(公告)日：2018-05-17

申请号：US15665691

申请日：2017-08-01

Applicant: Hitachi, Ltd.

Inventor： Qinghua SUN ,  Ryoichi TAKASHIMA ,  Takuya FUJIOKA

IPC: G10L21/0216 ,  G06F17/28

CPC classification number: G10L21/0216 ,  G06F17/28 ,  G10L2021/02082 ,  G10L2021/02166

Abstract: In a speech signal processing device including a plurality of devices and a speech signal processing device, a first device of the devices is connected to a microphone to output a microphone input signal to the speech signal processing device. A second device of the devices is connected to a speaker to output a speaker output signal, which is the same as the signal output to the speaker, to the speech signal processing device. The speech signal processing device synchronizes a waveform included in the microphone input signal with a waveform included in the speaker output signal, and removes the waveform included in the speaker output signal from the waveform included in the microphone input signal.

公开(公告)号：US20190035418A1

公开(公告)日：2019-01-31

申请号：US15758747

申请日：2015-10-09

Applicant: Hitachi, Ltd.

Inventor： Ryoichi TAKASHIMA ,  Yohei KAWAGUCHI ,  Takashi SUMIYOSHI ,  Masahito TOGAMI

IPC: G10L21/0308 ,  G10L15/20 ,  G10L21/028

Abstract: A sound signal processing method and device are provided for separating sounds of the respective sound sources even when sounds are recorded asynchronously by a plurality of devices. Specifically, the present invention comprises the steps of instructing each of the plurality of devices to output a reference signal of a different frequency, receiving each of the reference signals output from the speaker of the plurality of devices according to the instruction, receiving sound signals in which each of the reference signals output from the speaker of the plurality of devices is input into the microphone of the plurality of devices, calculating a time shift amount of each of the devices based on each of the received reference signals output from the speaker and the received sound signals, and separating the plurality of signal signals input into the microphone of the plurality of devices based on the calculated time shift amount.