METHOD AND SYSTEM FOR SIGNAL ANALYZING AND PROCESSING MODULE

• US 20140323890A1
• Filed: 04/29/2013
• Published: 10/30/2014
• Est. Priority Date: 04/29/2013
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Ku, Po-Wen
• Granted Patent: US 9,687,164 B2
• Time in Patent Office: Days
• US Class Current: 600/509
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts
• CPC Class Codes: A61B 5/725 using specific filters therefor, e.g. Kalman or adaptive filters A61B5/316 take precedence

Abstract

Embodiments of the invention disclose a method and a system for signal analyzing and a processing module of the system. The signal analyzing system includes a plurality of first electrodes, a plurality of second electrodes, and a processing module. The first electrodes transmit a plurality of first input signals. The second electrodes transmit a plurality of second input signals. The processing module generates a body electrical signal according to at least one of the plurality of first input signals and at least one of the plurality of second input signals, generates a first filtered signal corresponding to the plurality of first input signals, generates a second filtered signal corresponding to the plurality of second input signals, and generates a lead signal according to the body electrical signal, the first filtered signal and the second filtered signal.

Claims

1. A signal analyzing method, comprising:

generating a body electrical signal according to at least one of a plurality of first input signals and at least one of a plurality of second input signals;

generating a first filtered signal by filtering a first difference signal corresponding to the plurality of first input signals;

generating a second filtered signal by filtering a second difference corresponding to the plurality of second input signals; and

generating a lead signal according to the body electrical signal, the first filtered signal and the second filtered signal,

wherein the plurality of first input signals are transmitted from a plurality of first electrodes of a first electrode group, and the second input signals are transmitted from a plurality of second electrodes of a second electrode group.

2. The signal analyzing method according to claim 1, wherein the plurality of first electrodes and the plurality of second electrodes are attached to a human body and configured to detect electrocardiogram (ECG) signals, the plurality of first electrodes are disposed within a first predetermined distance, and the plurality of second electrodes are disposed within a second predetermined distance.

3. The signal analyzing method according to claim 1, wherein the first filtered signal is generated according to the lead signal and the first difference signal corresponding to the plurality of first input signals, and the second filtered signal is generated according to the lead signal and the second difference signal of the plurality of second input signals.

4. The signal analyzing method according to claim 1, wherein the body electrical signal is generated according to the difference of the sum of the plurality of first input signals and the sum of the plurality of second input signals.

5. The signal analyzing method according to claim 1, wherein at least one of the first input signals is filtered with a first frequency response, at least another one of the first input signals is filtered with a second frequency response, and the first difference signal is generated by filtering the difference of the first input signal filtered with the first frequency response and the first input signal filtered with the second frequency response.

6. The signal analyzing method according to claim 1, wherein at least one of the first input signals is obtained by a first type of electrode, at least another one of the first input signals is obtained by a different second type of electrode, and the first difference signal is generated by filtering the difference of the first input signal obtained by the first type of electrode and the first input signal obtained by the second type of electrode.

7. The signal analyzing method according to claim 1, further comprising:

filtering at least one of the first input signals with a first modifying unit having a first frequency response; and

filtering at least another one of the first input signals with a second modifying unit having a second frequency response;

wherein the first frequency response and the second frequency response are different.

8. A signal analyzing system, comprising:

a first electrode group, having a plurality of first electrodes, configured to transmit a plurality of first input signals;

a second electrode group, having a plurality of second electrodes, configured to transmit a plurality of second input signals; and

a processing module, comprising;

a first calculating unit, coupled to the first electrode group and the second electrode group for receiving at least one of the plurality of first input signals and at least one of the plurality of second input signals, configured to generate a body electrical signal according to at least one of the first input signals and at least one of the second input signals;

a second calculating unit, coupled to the first electrode group for receiving the plurality of first input signals, configured to generate a first filtered signal by filtering a first difference signal corresponding to the plurality of first input signals;

a third calculating unit, coupled to the second electrode group for receiving the plurality of second input signals, configured to generate a second filtered signal by filtering a second difference signal corresponding to the plurality of second input signals; and

a fourth calculating unit, coupled to the first calculating unit, the second calculating unit and the third calculating unit for receiving the body electrical signal, the first filtered signal and the second filtered signal, configured to generate a lead signal according to the body electrical signal, the first filtered signal and the second filtered signal.

9. The signal analyzing system according to claim 8, wherein the plurality of first electrodes and the plurality of second electrodes are attached to a human body and configured to detect electrocardiogram (ECG) signals, the plurality of first electrodes are disposed within a first predetermined distance, and the plurality of second electrodes are disposed within a second predetermined distance.

10. The signal analyzing system according to claim 8, wherein the second calculating unit further receives the lead signal, and the second calculating unit generates the first filtered signal according to the first difference signal and the lead signal.

11. The signal analyzing system according to claim 8, wherein the third calculating unit further receives the lead signal, and the third calculating unit generates the second filtered signal according to the second difference signal and the lead signal.

12. The signal analyzing system according to claim 8, wherein the first calculating unit receives the plurality of first input signals and the plurality of second input signals, and generates the body electrical signal according to the difference of the sum of the plurality of first input signals and the sum of the plurality of second input signals.

13. The signal analyzing system according to claim 8, wherein the processing module further comprises:

a first modifying unit having a first frequency response for filtering at least one of the first input signals; and

a second modifying unit having a second frequency response for filtering at least another one of the first input signals;

wherein the first frequency response and the second frequency response are different.

14. The signal analyzing system according to claim 8, wherein the first electrode group further comprises:

a first type of electrodes configured to transmit at least one of the plurality of first input signals; and

a second type of electrodes configured to transmit at least another one of the plurality of first input signals;

wherein the first type electrodes and the second type of electrodes are different.

15. A processing module, comprising:

a first calculating unit, coupled to a plurality of first electrodes and a plurality of second electrodes for receiving at least one of a plurality of first input signals obtained from the plurality of first electrodes and at least one of a plurality of second input signals obtained from the plurality of second electrodes, configured to generate a body electrical signal according to at least one of the first input signals and at least one of the second input signals;

a second calculating unit, coupled to the first electrodes for receiving the plurality of first input signals, configured to generate a first filtered signal for estimating the motion artifact corresponding to the first electrodes by filtering a first difference signal corresponding to the plurality of first input signals;

a third calculating unit, coupled to the second electrodes for receiving the plurality of second input signals, configured to generate a second filtered signal for estimating the motion artifact corresponding to the second electrodes by filtering a second difference signal corresponding to the plurality of second input signals; and

a fourth calculating unit, coupled to the first calculating unit, the second calculating unit, and the third calculating unit for receiving the body electrical signal, the first filtered signal and the second filtered signal respectively, configured to generate a lead signal according to the body electrical signal, the first filtered signal and the second filtered signal.

16. The processing module according to claim 15, wherein the plurality of first electrodes and the plurality of second electrodes are attached to a human body and configured to detect electrocardiogram (ECG) signals, the plurality of first electrodes are disposed within a first predetermined distance, and the plurality of second electrodes are disposed within a second predetermined distance.

17. The processing module according to claim 15, wherein the second calculating unit further receives the lead signal, and the second calculating unit generates the first filtered signal according to the first difference signal and the lead signal.

18. The processing module according to claim 15, wherein and the third calculating unit further receives the lead signal, and the third calculating unit generates the second filtered according to the second difference signal and the lead signal.

19. The processing module according to claim 15, wherein the first calculating unit receives the plurality of first input signals and the plurality of second input signals, and generates the body electrical signal according to the difference of the sum of the plurality of first input signals and the sum of the plurality of second input signals.

20. The processing module according to claim 15, further comprising:

a first modifying unit having a first frequency response for filtering at least one of the first input signals; and

a second modifying unit having a second frequency response for filtering at least another one of the first input signals;

wherein the first frequency response and the second frequency response are different.