Tohoku University

Tohoku Techno Arch Co., Ltd.

Shinichi Chida

Yoshitaka Kimura

Takuya Ito

Mitsuyuki Nakao

Kunihiro Okamura

Masato Senoo

Michiyoshi Sato

Takayuki Shimazaki

Junichi Sugawara

Michiyoshi C/O Tohoku University Sato

Mitsuyuki C/O Tohoku University Nakao

Yoshitaka C/O Tohoku University Kimura

Takuya C/O Tohoku University Ito

Takayuki C/O Tohoku University Shimazaki

Junichi C/O Tohoku University Sugawara

Kunihiro C/O Tohoku University Okamura

Masato C/O Tohoku University Senoo

An electrocardiogram signal processing method and device for extracting a fetus electrocardiogram signal included in a biopotential signal detected from an electrode attached to a mother's body is provided. The electrocardiogram signal processing method for extracting an electrocardiogram signal of a fetus () from a biopotential signal containing electrocardiogram signals of the mother's body () and a fetus () inputted through an electrode (E) attached to the mother's body () during pregnancy, comprises a reference signal generating stepof generating a reference signal for separating/extracting a fetus electrocardiogram signal of a specified induction type according to a beat rate signal inputted from a sensor (S) for detecting the beat rate of the fetus () and a fetus electrocardiogram signal extracting stepof separating/extracting the fetus electrocardiogram signal of the specified induction type from the biopotential signal inputted through an electrode (E) according to the reference signal generated at reference signal generating stepby a reference system independent component analyzing method.

Electrocardiogram signal-processing method and electrocardiogram signal-processing device

There is provided a non-linear signal separation method using the non-linear state space projection method capable of separating an effective non-linear signal even if the S/N ratio is low by performing the time domain high speed non-linear state space projection when a signal is a multi-channel signal and has a periodicity. In the non-linear signal separation method using the non-linear state space projection method, an original signal having a complex signal which is a multi-channel and cyclic signal measured from one phenomenon is processed by using the time domain high-speed non-linear state space projection method so as to estimate a noise in the original signal and subtract the estimated noise from the original signal, thereby separating the signal to be measured in the original signal as a non-linear signal even when the S/N ratio is low.

Non-linear signal separation method using non-linear state space projection method

Growing community of inventors

Sendai, Japan

Shinichi Chida