公开(公告)号：US10478129B2

公开(公告)日：2019-11-19

申请号：US14931440

申请日：2015-11-03

Applicant: Samsung Electronics Co., LTD

Inventor： Matthew C. Wiggins ,  Asif Khalak ,  Yelei Li

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/0402 ,  A61B5/08 ,  A61B5/1455 ,  G01N33/483

Abstract: A computer-implemented method for estimating biophysiological rates using the Hilbert transform includes receiving a quasiperiodic data stream from a biophysiological sensor, and removing at least a portion of an offset from the quasiperiodic data stream to provide a smoothed data stream by filtering the quasiperiodic data stream through a bandpass filter and phase compensating the filtered quasiperiodic data stream. The method also includes transforming the smoothed data stream into an analytic data stream using a Hilbert transform approximation and calculating the time derivative of the phase angle of the analytic data stream, where the time derivative is a frequency of the quasiperiodic data stream. The method further includes providing an output data stream derived from the frequency.

公开(公告)号：US20160220192A1

公开(公告)日：2016-08-04

申请号：US14931440

申请日：2015-11-03

Applicant: Samsung Electronics Co., LTD

Inventor： Matthew C. Wiggins ,  Asif Khalak ,  Yelei Li

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/0402

Abstract: A computer-implemented method for estimating biophysiological rates using the Hilbert transform includes receiving a quasiperiodic data stream from a biophysiological sensor, and removing at least a portion of an offset from the quasiperiodic data stream to provide a smoothed data stream by filtering the quasiperiodic data stream through a bandpass filter and phase compensating the filtered quasiperiodic data stream. The method also includes transforming the smoothed data stream into an analytic data stream using a Hilbert transform approximation and calculating the time derivative of the phase angle of the analytic data stream, where the time derivative is a frequency of the quasiperiodic data stream. The method further includes providing an output data stream derived from the frequency.

Abstract translation: 使用希尔伯特变换来估计生物生理率的计算机实现的方法包括从生物生理学传感器接收准周期数据流，以及从准周期数据流中移除偏移的至少一部分以通过过滤准周期数据流来提供平滑的数据流 通过带通滤波器和相位补偿滤波的准周期数据流。 该方法还包括使用希尔伯特变换近似将平滑的数据流变换成分析数据流，并计算分析数据流的相位角的时间导数，其中时间导数是准周期数据流的频率。 该方法还包括提供从该频率导出的输出数据流。

公开(公告)号：US10405803B2

公开(公告)日：2019-09-10

申请号：US14928072

申请日：2015-10-30

Applicant: Samsung Electronics Co., LTD

Inventor： Yelei Li ,  Asif Khalak

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/0402 ,  A61B5/08 ,  A61B5/1455 ,  G01N33/483

Abstract: A computer-implemented method for estimating a cardiovascular feature, such as heart interbeat intervals, using time-delay embedding includes receiving a quasiperiodic observational data stream from a biophysiological sensor, selecting a first delay value, and generating a first vector with a first dimensionality in a multidimensional coordinate space from the observational data stream through time-delay embedding. The method also includes selecting a first plane with a second dimensionality equal to one less than the first dimensionality and which passes through an origin of the coordinate space, identifying a plurality of crossings of the first vector through the first plane in one direction, and correlating a time value corresponding to each of the crossings. The method further includes calculating a plurality of periods between the time values corresponding to consecutive crossings, where the periods represent a stream of interbeat intervals.