Samsung Electronics Co., Ltd.

Yonsei University

Korea University Industrial & Academic Collaboration Foundation

Snur & Db Foundation

Purdue Research Foundation

Chang Soon Park

Ui Kun Kwon

Young Jun Hong

Dae Geun Jang

Young Soo Kim

Seung Keun Yoon

Joon Seong Kang

Sujit Jos

Kiran Bynam

Sang Joon Kim

Youngsoo Kim

Manoj Choudhary

Chandrashekhar Thejaswi Ps

Jinesh Parameshwaran Nair

Hyosun Hwang

Hyo Sun Hwang

Seung Woo Noh

Changmok Choi

Ashutosh Deepak Gore

Sung Jin Kim

Jong Han Kim

Seungkeun Yoon

Yunseo Ku

Jaechun Lee

Jaewook Shim

Chang Mok Choi

Young-Chai Ko

Chi Sung Bae

Jun Mo Kim

Ki-hong Park

Jin Hee Lee

Jang Won Lee

Youn Ho Kim

Ill Soo Sohn

Seok Ju Yun

Tae In Hyon

Sooyong Choi

Jun Il Choi

Sang-joon Kim

Hye Rim Lim

Sung Yeon Kim

Minchae Jung

Jong Ae Park

Jae Seok Kim

Kwang Bok Lee

Kyuho Hwang

Sung-Jin Kim

Jin Woo Choi

Bruno Clerckx

Chan Soo Hwang

Sung Soo Park

Jong Wook Lee

Seungchul Jung

David James Love

Il Han Kim

Joonseong Kang

Seong Joong Kim

Yongok Kim

Daesik Hong

Chun Kin Au Yeung

Ki Ho Kim

Seok Won Lee

Dae Sik Hong

SeokWon Lee

Jung Hoon Suh

Hyun Sik Jung

Duck Dong Hwang

Jeong Ahn Kwon

Pramod Viswanath

Seung Young Park

Jun Ha Im

Hyoung Joo Lee

Chandrashekhar Thejaswi Pattaguppe Suryanarayan Bhat

Hyung Sik Ju

Un Sun Cho

Hyungsik Ju

A blood pressure monitor may include a photoplethysmogram (PPG) sensor to obtain a PPG sensor and at least one processor configured to extract characteristic points from the PPG signal, determine internally dividing points of the characteristic points based on time values of the characteristic points, extract feature values from the PPG signal based on the internally dividing points, and determine a blood pressure based on the extracted feature values of the PPG signal. The blood pressure monitor may further include a display configured to provide a graphical user interface that displays a vertical line that is movable in a timeline over a graph that shows a change in the blood pressure over time, a blood pressure value corresponding to a position of the vertical line, and component pulses constituting the PPG signal, together with the graph and the vertical line.

Apparatus and method for estimating bio-information

An apparatus for non-invasively estimating bio-information and a method of determining whether a bio-signal is normal by the apparatus for estimating bio-information are provided. The apparatus for estimating bio-information according to an embodiment of the disclosure includes: a photoplethysmogram (PPG) sensor configured to measure a PPG signal from an object; and a processor configured to extract a plurality of pairs of local maximum points and local minimum points from a second derivative signal of the PPG signal, to select at least one reference pair from among the extracted plurality of pairs, and to determine whether the PPG signal is normal based on the selected at least one reference pair.

Apparatus for estimating bio-information and method of detecting abnormal bio-signal

An apparatus for non-invasively estimating blood pressure is provided. The apparatus for estimating blood pressure may include a bio-signal measurer configured to measure a bio-signal from a user and a processor configured to estimate blood pressure using the measured bio-signal. The processor may extract a first feature and a second feature from the bio-signal at an extraction time, estimate changes in the first feature and the second feature which have occurred during a time period from a calibration time at which the first feature and the second feature are calibrated to the extraction time at which the first feature and the second feature are extracted, and estimate a blood pressure based on the changes in the first feature and the second feature.

Apparatus and method for estimating blood pressure

An apparatus for estimating blood pressure may include: a photoplethysmogram (PPG) sensor configured to measure a PPG signal from a user; and a processor configured to: extract a cardiovascular feature from the PPG signal; calculate a first variation in the extracted cardiovascular feature compared to a reference cardiovascular feature measured at a reference time; determine a measurement posture of the PPG signal based on a time interval between two waveform components of the PPG signal; in response to the measurement posture corresponding to the reference posture, estimate the blood pressure based on the first variation; and in response to the measurement posture not corresponding to the reference posture, obtain a second variation by correcting the first variation; and estimate blood pressure based on the second variation.

An apparatus for estimating blood pressure may include: a memory storing one or more instructions; and a processor configured to execute the one or more instructions to: extract a cardiac output (CO) feature, a first candidate total peripheral resistance (TPR) feature, and a second candidate TPR feature from a bio-signal; determine one of the first candidate TPR feature and the second candidate TPR feature as a TPR feature based on a direction of change in the CO feature and a direction of change in the first candidate TPR feature between a blood pressure measurement time and a calibration time; and estimate the blood pressure based on the TPR feature and the CO feature.

An adaptive bio-signal feature combining apparatus includes: a feature extractor configured to extract first feature values and second feature values from a bio-signal of an object; a stable interval determiner configured to determine at least one stable interval in the bio-signal; a statistical variable calculator configured to calculate a statistical variable value of a first feature and a statistical variable value of a second feature for each of the at least one stable interval based on the first and second feature values extracted from the at least one stable interval; and a feature combiner configured to calculate an integrated combining coefficient that is used to combine the first feature and the second feature, based on the statistical variable value of the first feature and the statistical variable value of the second feature.

Adaptive bio-signal feature combining apparatus and method

A method of obtaining a feature for blood pressure estimation is provided. The method includes extracting a reference feature from a bio-signal; obtaining a feature for blood pressure estimation by: obtaining, as the feature for blood pressure estimation, a first candidate feature based on the reference feature being less than a first threshold; obtaining, as the feature for blood pressure estimation, a second candidate feature based on the reference feature being greater than or equal to a second threshold that is greater than the first threshold; or obtaining, as the feature for blood pressure estimation, a combination of the first candidate feature and the second candidate feature based on the reference feature being less than the second threshold; and estimating a blood pressure by using the obtained feature.

Method of obtaining feature for blood pressure estimation, apparatus and method for estimating blood pressure

An apparatus for non-invasively estimating bio-information may include a bio-signal acquirer configured to acquire a bio-signal; and a processor configured to extract a plurality of characteristic points from the bio-signal, determine internally dividing points of the plurality of characteristic points, and extract feature values from the bio-signal based on the internally dividing points to perform bio-information estimation. The plurality of characteristic points may include a first time point and a second time point when the pulse wave signal includes a first component pulse wave that has a maximum amplitude at the first time point, and a second component pulse wave that has a maximum amplitude at the second time point.

An apparatus for estimating blood pressure is provided. The apparatus for estimating blood pressure according to an example embodiment includes: a sensor configured to measure a photoplethysmogram (PPG) signal from an object; and a processor configured to detect a position of a dicrotic notch based on a local maximum point and a local minimum point of a second-order derivative signal of the PPG signal, to obtain a first value and a second value from a first section and a second section of the PPG signal divided based on the dicrotic notch of the PPG signal, to obtain a pulse pressure feature value based on the first value and the second value, and to estimate blood pressure based on a variation in the obtained pulse pressure feature value compared to a reference pulse pressure feature value.

Provided is an apparatus for estimating bio-information. The apparatus for estimating bio-information according to an embodiment includes a processor configured to obtain a pulse wave signal from a user; extract components of a plurality of element waveforms which constitute a waveform of the pulse wave signal; and obtain a cardiovascular feature based on the extracted components of the plurality of element waveforms. The processor is configured to extract a component of at least one element waveform based on a component of an adjacent element waveform.

An apparatus for estimating blood pressure is provided. According to one embodiment, the apparatus for estimating blood pressure may include a sensor configured to measure a bio-signal from a subject, and a processor configured to acquire, form the bio-signal, a first feature value associated with cardiac output (CO) and a second feature value associated with total peripheral resistance (TPR), determine whether a current mechanism of blood pressure change of the subject is a post-exercise hypotension mechanism based on the first feature value and the second feature value, and estimate blood pressure according to determination of whether the current mechanism is the post-exercise hypotension mechanism.

A blood pressure estimating apparatus includes a sensor configured to obtain a bio-signal of an object; and a processor configured to extract a first cardiovascular feature and a second cardiovascular feature based on the bio-signal, and estimate blood pressure based on a first changing tendency of the first cardiovascular feature from a first reference level and a second changing tendency of the second cardiovascular feature from a second reference level, the first changing tendency and the second changing tendency being independent from each other.

Blood pressure estimating apparatus and blood pressure estimating method

An apparatus for estimating bio-information may include: a processor configured to measure a current time interval between a plurality of element waveforms of the pulse wave signal, determine whether a current measurement posture of the user corresponds to a reference posture based on the current time interval of the plurality of element waveforms, and estimate the bio-information based on a determination of whether the current measurement posture corresponds to the reference posture.

An apparatus for estimating bio-information may include: a bio-signal acquirer configured to acquire a bio-signal; and a processor configured to extract one or more first feature values from the bio-signal, determine a scale factor based on the first feature values, and to estimate bio-information based on the scale factor and the first feature values.

An apparatus for calibration of a bio-information estimation model includes a sensor configured to obtain a bio-signal from an object in a reference interval; a feature extractor, implemented by at least one processor, configure to extract a reference feature value from the bio-signal; and a calibrator, implemented by the at least one processor, configured to determine whether a condition is satisfied based on at least one of the reference feature value and an offset value, and based on determining that the condition is satisfied, configured to calibrate the bio-information estimation model based on the reference feature value and the offset value.

Apparatus and method for calibration of bio-information estimation model, and bio-information estimating apparatus

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Chungju-si, South Korea

Chang Soon Park