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

Patent metadata

Field	Value
Publication number	US-2017193207-A1
Application number	US-201514985291-A
Country	US
Kind code	A1
Filing date	Dec 30, 2015
Priority date	Dec 30, 2015
Publication date	Jul 6, 2017
Grant date	—

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 photoplethysmography (PPG) sensor and generating a first biometric template; extracting biometric features from biometric data obtained using a second biometric sensor and generating a second biometric template; 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 , wherein extracting biometric features from biometric data obtained using a second biometric sensor and generating a second biometric template, comprises:
extracting bulk absorption features from biometric data obtained using the second biometric sensor, where the second biometric sensor is a second PPG sensor and operates in a different spectral range from the first PPG sensor; and generating the second biometric template using the extracted bulk absorption features from the biometric data obtained at the different spectral range.

3 . The method of claim 1 , further comprising:
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 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.

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

5 . The method of claim 1 , 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.

6 . The method of claim 2 , further comprising:
extracting bulk absorption features from biometric data obtained using the PPG sensor in an infrared spectral range and generating a first biometric template; extracting bulk absorption features from biometric data obtained using the second biometric sensor, where the second biometric sensor is a second PPG sensor that operates 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.

7 . A multimodal biometric authentication apparatus, comprising:
a 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; 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.

8 . The multimodal biometric authentication apparatus of claim 7 , wherein the first PPG sensor is operative in a first spectral range and the second biometric sensor is a second PPG sensor operative in a second spectral range; and wherein the processor is further operative to:
extract bulk absorption features from biometric data obtained using the second PPG sensor, in the second spectral range; and generate the second biometric template using the extracted bulk absorption features from the biometric data obtained at the second spectral range.

9 . The multimodal biometric authentication apparatus of claim 7 , wherein the 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 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.

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

11 . The multimodal biometric authentication apparatus of claim 7 , where the PPG sensor is an absorptive PPG sensor and the second biometric sensor is a reflective PPG sensor.

12 . The multimodal biometric authentication apparatus of claim 7 , further comprising:
non-volatile, non-transitory memory, operatively coupled to the processor, the memory containing at least two enrolled biometric templates, a first enrolled biometric template related to a bulk absorption biometric and a second enrolled biometric template related to a biometric measurable by the second biometric sensor.

13 . The multimodal biometric authentication apparatus of claim 7 , wherein the PPG sensor is operative in an infrared spectral range and the second biometric sensor is a second PPG sensor operative in a green spectral range.

14 . The multimodal biometric authentication apparatus of claim 13 , wherein the PPG sensor is an absorptive PPG sensor and the second biometric sensor is a reflective PPG sensor.

Assignees

• Motorola Mobility Llc

Inventors

• Ashley James
• Christian Paul
• Gyorfi Julius

Classifications

• G06F21/32 Primary

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

• H04W12/06

  Authentication · 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