Multimodal biometric authentication system and method with photoplethysmography (PPG) bulk absorption biometric

Patent metadata

Field	Value
Publication number	US-9892247-B2
Application number	US-201514985291-A
Country	US
Kind code	B2
Filing date	Dec 30, 2015
Priority date	Dec 30, 2015
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A multimodal biometric authentication system utilizes a bulk absorption characteristic of human tissue that is measurable using a photoplethysmography (PPG) sensor. One disclosed method of operation includes extracting bulk absorption features from biometric data obtained using a PPG sensor and generating a first biometric template. Additional biometric features are also extracted from biometric data obtained using a second biometric sensor and a second biometric template is also generated. An authentication output signal is provided in response to the first biometric template matching a first enrolled biometric template and the second biometric template matching a second enrolled biometric template.

First claim

What is claimed is:

1. A method comprising:
extracting bulk absorption features from biometric data obtained using a first photoplethysmography (PPG) sensor and generating a first biometric template;
extracting bulk absorption features from biometric data obtained using a second PPG sensor that operates in a different spectral range from the first PPG sensor;
generating a second biometric template using the extracted bulk absorption features from the biometric data obtained at the different spectral range; and
providing an authentication output signal in response to the first biometric template matching a first enrolled biometric template and the second biometric template matching a second enrolled biometric template.

2. The method of claim 1 , further comprising:
extracting additional bulk absorption features from additional biometric data obtained using the first PPG sensor in a second spectral range and generating a third biometric template; and
providing the authentication output signal in response to the first biometric template matching a first enrolled biometric template, the second biometric template matching a second enrolled biometric template, and the third biometric template matching a third enrolled biometric template.

3. The method of claim 1 , further comprising:
sending the authentication output signal to a protected system over a wireless link.

4. The method of claim 1 , further comprising:
extracting bulk absorption features from biometric data obtained using the first PPG sensor in an infrared spectral range and generating a first biometric template;
extracting bulk absorption features from biometric data obtained using the second PPG sensor in a green spectral range; and
generating the second biometric template using the extracted bulk absorption features from the biometric data obtained at the green spectral range.

5. A multimodal biometric authentication apparatus, comprising:
a first photoplethysmography (PPG) sensor operative in a first spectral range;
a second PPG sensor operative in a second spectral range; and
a processor, operatively coupled to the first PPG sensor and to the second PPG sensor, the processor operative to:
extract bulk absorption features from biometric data obtained using the first PPG sensor in the first spectral range and generate a first biometric template;
extract biometric features from biometric data obtained using the second PPG sensor in the second spectral range and generate a second biometric template; and
provide an authentication output signal in response to the first biometric template matching a first enrolled biometric template and the second biometric template matching a second enrolled biometric template.

6. The multimodal biometric authentication apparatus of claim 5 , wherein the second PPG sensor is a multispectral PPG sensor; and
wherein the processor is further operative to:
extract additional bulk absorption features from additional biometric data obtained using the second PPG sensor in a third spectral range and generate a third biometric template; and
provide the authentication output signal in response to the first biometric template matching a first enrolled biometric template, the second biometric template matching a second enrolled biometric template, and the third biometric template matching a third enrolled biometric template.

7. The multimodal biometric authentication apparatus of claim 5 , wherein one of the PPG sensors is a reflective PPG sensor.

8. The multimodal biometric authentication apparatus of claim 5 , where the first PPG sensor is an absorptive PPG sensor and the second PPG sensor is a reflective PPG sensor.

9. The multimodal biometric authentication apparatus of claim 5 , further comprising:
non-volatile, non-transitory memory, operatively coupled to the processor, the memory containing at least two enrolled biometric templates, the first enrolled biometric template related to a bulk absorption biometric measurable by the first PPG sensor, and
the second enrolled biometric template related to a bulk absorption biometric measurable by the second PPG sensor.

10. The multimodal biometric authentication apparatus of claim 5 , wherein the first PPG sensor is operative in an infrared spectral range and the second PPG sensor is operative in a green spectral range.

11. The multimodal biometric authentication apparatus of claim 10 , wherein the first PPG sensor is an absorptive PPG sensor and the second PPG sensor is a reflective PPG sensor.

12. The multimodal biometric authentication apparatus of claim 5 , further comprising a wireless transceiver, operatively coupled to the processor, the wireless transceiver operative to send the authentication output signal to a protected system over a wireless link.

13. A method comprising:
extracting bulk absorption features from biometric data obtained using a photoplethysmography (PPG) sensor in a first spectral range and generating a first biometric template;
extracting biometric features from biometric data obtained using a second biometric sensor and generating a second biometric template;
extracting additional bulk absorption features from additional biometric data obtained using the PPG sensor in a second spectral range and generating a third biometric template; and
providing an authentication output signal in response to the first biometric template matching a first enrolled biometric template, the second biometric template matching a second enrolled biometric template, and the third biometric template matching a third enrolled biometric template.

14. The method of claim 13 , wherein extracting biometric features from biometric data obtained using the second biometric sensor and generating the second biometric template, comprises:
extracting a voice print as the biometric features from biometric data obtained using a microphone as the second biometric sensor and generating a voice print as the second biometric template.

15. The method of claim 13 , further comprising:
sending the authentication output signal to a protected system over a wireless link.

16. A multimodal biometric authentication apparatus, comprising:
a multispectral photoplethysmography (PPG) sensor;
a second biometric sensor;
a processor, operatively coupled to the PPG sensor and to the second biometric sensor, the processor operative to:
extract bulk absorption features from biometric data obtained using the PPG sensor and generate a first biometric template;
extract biometric features from biometric data obtained using the second biometric sensor and generate a second biometric template;
extract additional bulk absorption features from additional biometric data obtained using the multispectral PPG sensor in a second spectral range and generate a third biometric template; and
provide the authentication output signal in response to the first biometric template matching a first enrolled biometric template, the second biometric template matching a second enrolled biometric template, and the third biometric template matching a third enrolled biometric template.

17. The multimodal biometric authentication apparatus of claim 16 , wherein the second biometric sensor is a microphone.

18. The multimodal biometric authentication apparatus of claim 17 , wherein the processor is further operative to:
extract a voice print as the biometric features from biometric data obtained using the microphone as the second biometric sensor and generate a voice print as the second biometric template.

19. The multimod

Assignees

• Motorola Mobility Llc

Inventors

• Ashley James
• Christian Paul
• Gyorfi Julius

Classifications

• H04W12/06

  Authentication · CPC title

• G06F21/32 Primary

  using biometric data, e.g. fingerprints, iris scans or voiceprints · CPC title

• H04L63/0861

  using biometrical features, e.g. fingerprint, retina-scan (cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231) · CPC title