Abstract: An Electrocardiography (ECG) noise-filtering device is provided in the invention. The ECG device includes a filter and a calculation circuit. The filter receives a first ECG signal and performs a Savitzky-Golay algorithm to generate a second ECG signal. The calculation circuit is coupled to the filter to receive the second ECG signal and processes the second ECG signal according to a Stationary Wavelet Transform (SWT) algorithm to generate a noise signal, and subtracts the noise signal from the second ECG signal to filter the noise signal in the first ECG signal.

Abstract: An Electrocardiography (ECG) noise-filtering device is provided in the invention. The ECG device includes a filter and a calculation circuit. The filter receives a first ECG signal and performs a Savitzky-Golay algorithm to generate a second ECG signal. The calculation circuit is coupled to the filter to receive the second ECG signal and processes the second ECG signal according to a Stationary Wavelet Transform (SWT) algorithm to generate a noise signal, and subtracts the noise signal from the second ECG signal to filter the noise signal in the first ECG signal.

Abstract: A physiological signal processing method includes the following steps: receiving a plurality of ECG signals and user information; capturing the ECG signals; detecting the displacement state of the ECG monitoring device to obtain three-axis data; calculating the heart rate based on an ECG or the ECG signals, and calculating an activity amount based on the three-axis data; and generating an activity intensity based on the activity amount, the user information, and the heart rate.

Abstract: A sleep detection system and method are provided. In the sleep detection system, a sensor device is configured to measure a heart rate of a user; a measuring device is configured to receive the heart rate, and measure an activity level of the user and calculate an energy-expenditure value according to the heart rate, the activity level and personal parameters of the user; and a receiving device is configured to receive the energy-expenditure value from the measuring device and generate a sleep analysis result according to the energy-expenditure and to display the sleep analysis result.