Method and system for signal analyzing and processing module

• US 9,687,164 B2
• Filed: 04/29/2013
• Issued: 06/27/2017
• Est. Priority Date: 04/29/2013
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Ku, Po-Wen
• Primary Examiner(s): Koharski, Christopher D
• Assistant Examiner(s): KIMBALL, JEREMIAH T
• Application Number:
  US13/873,202
• Publication Number:
  US 20140323890A1
• Time in Patent Office: 1,520 Days
• Field of Search: 600509
• 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 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 by subtracting the first filtered signal and the second filtered signal from the body electrical signal.

2. The signal analyzing system according to claim 1, wherein the plurality of first electrodes and the plurality of second electrodes are adapted to be 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 system according to claim 1, wherein the second calculating unit further receives the lead signal, and the second calculating unit generates the subsequent first filtered signal according to the subsequent first difference signal and the lead signal.

4. The signal analyzing system according to claim 1, wherein the third calculating unit further receives the lead signal, and the third calculating unit generates the subsequent second filtered signal according to the subsequent second difference signal and the lead signal.

5. The signal analyzing system according to claim 1, 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 a difference of a sum of the plurality of first input signals and a sum of the plurality of second input signals.

6. The signal analyzing system according to claim 1, 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.

7. The signal analyzing system according to claim 1, 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.

14. The signal analyzing system according to claim 1, wherein the second calculating circuit comprises:

a first subtractor, for calculating a difference between two of the plurality of first input signals to generate the first difference signal;

a first variable filter, coupled to the first subtractor, for filtering the first difference signal to generate the first filtered signal; and

the third calculating circuit comprises;

a second subtractor, for calculating a difference between two of the plurality of second input signals to generate the second difference signal;

a second variable filter, coupled to the second subtractor, for filtering the second difference signal to generate the second filtered signal.

8. 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 by subtracting the first filtered signal and the second filtered signal from the body electrical signal.

9. The processing module according to claim 8, wherein the plurality of first electrodes and the plurality of second electrodes are adapted to be 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 processing module according to claim 8, wherein the second calculating unit further receives the lead signal, and the second calculating unit generates the subsequent first filtered signal according to the subsequent first difference signal and the lead signal.

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

12. The processing module 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 a difference of a sum of the plurality of first input signals and a sum of the plurality of second input signals.

13. The processing module according to claim 8, 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.

15. A signal analyzing method performed by a processing module of a system comprising a first electrode group and a second electrode group, wherein the first electrode group has a plurality of first electrodes configured to transmit a plurality of first input signals, and the second electrode group has a plurality of second electrodes configured to transmit a plurality of second input signals, and the signal analyzing method comprises:

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

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

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

receiving the body electrical signal, the first filtered signal and the second filtered signal, and generating a lead signal by subtracting the first filtered signal and the second filtered signal from the body electrical signal.

16. The signal analyzing method according to claim 15, wherein the plurality of first electrodes and the plurality of second electrodes are adapted to be 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 signal analyzing method according to claim 15, further comprising:

receiving the lead signal, and generating the subsequent first filtered signal according to the subsequent first difference signal and the lead signal.

18. The signal analyzing method according to claim 15, further comprising:

receiving the lead signal, and generating the subsequent second filtered signal according to the subsequent second difference signal and the lead signal.

19. The signal analyzing method according to claim 15, wherein the step of receiving at least one of the plurality of first input signals and at least one of the plurality of second input signals, and generating a body electrical signal according to at least one of the first input signals and at least one of the second input signals comprises:

receiving the plurality of first input signals and the plurality of second input signals, and generating the body electrical signal according to a difference of a sum of the plurality of first input signals and a sum of the plurality of second input signals.

20. The signal analyzing method according to claim 15, further comprising:

using a first modifying unit having a first frequency response to filter at least one of the first input signals; and

using a second modifying unit having a second frequency response to filter at least another one of the first input signals;

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

21. The signal analyzing method according to claim 15, 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.