Abstract: An electrocardiography signal extraction method includes receiving an electrocardiography signal, detecting a peak of a waveform of the electrocardiography signal, separating the waveform into left and right waves, normalizing the left wave and a plurality of scales of Gaussian function, comparing the normalized left wave with a left part of the normalized scales of Gaussian function, acquiring a left part error function, indicating a left minimum comparative error, selecting a left scale of Gaussian function with the left minimum comparative error, obtaining a left duration of the waveform, normalizing the right wave, comparing the normalized right wave with a right part of the normalized scales of Gaussian function, acquiring a right part error function, indicating a right minimum comparative error, selecting a right scale of Gaussian function with the right minimum comparative error, obtaining a right duration of the waveform, and obtaining an extracted wave.

Abstract: An electrocardiography signal extraction method is performed on a processor of a computer system and includes receiving an electrocardiography signal, performing a time-frequency transformation on the received electrocardiography signal to generate a corresponding scalogram, selecting a predetermined R-pertinent scale, performing the time-frequency transformation at the selected predetermined R-pertinent scale to generate a R-pertinent summarized response, obtaining a R peak position, selecting a predetermined QRS-pertinent scale, performing the time-frequency transformation at the selected predetermined QRS-pertinent scale, obtaining a Q peak position and a S peak position of the electrocardiography signal by finding relative maximum negative responses before and behind the R peak position respectively, obtaining a QRSon position and a QRSoff position by finding relative minimum second derivatives of the responses before the Q peak position and behind the S peak position, respectively.

Abstract: An electrocardiography signal extraction method includes receiving an electrocardiography signal, performing a time-frequency transformation on the received electrocardiography signal to generate a corresponding scalogram, selecting a pre-defined R-pertinent scale, performing the time-frequency transformation at the selected pre-defined R-pertinent scale to generate a R-pertinent summarized response, obtaining a R peak position, selecting a pre-defined QRS-pertinent scale, performing the time-frequency transformation at the selected pre-defined QRS-pertinent scale, obtaining a Q peak position and a S peak position of the electrocardiography signal by finding relative maximum negative responses before and behind the R peak position respectively, obtaining a QRSon position and a QRSoff position by finding relative minimum second derivatives of the responses before the Q peak position and behind the S peak position, respectively.

Abstract: An electrocardiography signal extraction method includes receiving an electrocardiography signal, detecting a peak of a wave of the electrocardiography signal, separating the wave into left and right waves, normalizing the left wave and a plurality of scales of Gaussian, comparing the normalized left wave with a left part of the normalized scales of Gaussian, acquiring a left part error function, indicating a left minimum comparative error, selecting a left scale of Gaussian with the left minimum comparative error, obtaining a left duration of the wave, normalizing the right wave, comparing the normalized right wave with a right part of the normalized scales of Gaussian, acquiring a right part error function, indicating a right minimum comparative error, selecting a right scale of Gaussian with the right minimum comparative error, obtaining a right duration of the wave, and obtaining an extracted wave.