Tohoku University

Tohoku Techno Arch Co., Ltd.

Kunihiro Okamura

Yoshitaka Kimura

Takuya Ito

Mitsuyuki Nakao

Shinichi Chida

Nobuo Yaegashi

Miyuki Endo

Michiyoshi Sato

Kunihiro Koide

Takayuki Shimazaki

Junichi Sugawara

Masato Senoo

A living body state estimation apparatus acquires information indicating a state of a living body. The living body state estimation apparatus is configured to include an electrocardiogram signal acquisition unit which acquires an electrocardiogram signal of the living body and an information acquisition unit which acquires a parameter as the information, the parameter specifying a predetermined function indicating a probability distribution for a reference wave interval which is a time interval between peaks of consecutive predetermined reference waves in the acquired electrocardiogram signal.

Living body state estimation apparatus, living body state estimating method, and non-transitory computer-readable medium

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

Kunihiro Okamura