Method for verifying the identity of a speaker, system therefore and computer readable medium

• US 9,792,912 B2
• Filed: 06/26/2009
• Issued: 10/17/2017
• Est. Priority Date: 12/10/2008
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Agnitio s.l. (Microsoft Corporation)
• Inventors: Asenjo, Marta Snchez, Gomar, Marta Garcia
• Primary Examiner(s): YEN, ERIC L
• Application Number:
  US13/381,076
• Publication Number:
  US 20120173239A1
• Time in Patent Office: 3,035 Days
• CPC Class Codes: B66B 13/26 between closing doors
• CPC Class Codes: G10L 17/00 Speaker identification or verification techniques
• CPC Class Codes: G10L 17/02 Preprocessing operations, e.g. segment selection; Pattern representation or modelling, e.g. based on linear discriminant analysis [LDA] or principal components; Feature selection or extraction
• CPC Class Codes: G10L 17/06 Decision making techniques; Pattern matching strategies
• CPC Class Codes: G10L 17/24 the user being prompted to utter a password or a predefined phrase
• CPC Class Codes: G10L 17/26 Recognition of special voice characteristics, e.g. for use in lie detectors; Recognition of animal voices

Abstract

The invention refers to a method of verifying the identity of a speaker based on the speakers voice comprising the steps of: receiving (1, 5) a first and a second voice utterance; using biometric voice data to verify (2, 6) that the speakers voice corresponds to the speaker the identity of which is to be verified based on the received first and/or second voice utterance and determine (8) the similarity of the two received voice utterances characterized in that the similarity is determined using biometric voice characteristics of the two voice utterances or data derived from such biometric voice characteristics. The invention further refers to a System (80) for verifying the identity of a speaker based on the speakers voice comprising: a component (81) for receiving a first and a second voice utterance; a component (82) for using biometric voice data to verify that the speakers voice corresponds to the speaker the identity of which is to be verified based on the received first and/or second voice utterance and a component (83) for comparing the two received voice utterances in order to determine the similarity of the two voice utterances characterized in that the similarity is determined using biometric voice characteristics of the two voice utterances or data derived from such biometric voice characteristics.

Claims

1. A method of verifying, using analysis of a speaker'"'"'s voice, a specific identity of a speaker, the method comprising the steps of:

a) receiving, at a first software component of an electronic access control system, a first voice utterance and a second voice utterance;

b) verifying, using biometric voice data extracted from the first and second received voice utterances and using a second software component of the electronic access control system, that the speaker'"'"'s voice corresponds to a specific identity; and

c) determining, using a third software component of the electronic access control system, an indicia of similarity of the two received voice utterances, wherein the indicia of similarity is determined using analysis of the extracted biometric voice data of the two received voice utterances;

wherein the extracted biometric voice data used for determining the indicia of similarity of the two received voice utterances comprise or are based on a first set of at least n values, wherein the first set of at least n values is determined from a time slice of one of the received voice utterances, the time slice having a length of between 10 and 40 ms, wherein n is a number between 2 and 40;

wherein if the speaker'"'"'s voice has been verified, using biometric voice data, to correspond to the specific identity, the second received voice utterance is requested from the speaker;

wherein the speaker is requested to repeat the first voice utterance in order to receive the second voice utterance; and

,

wherein data derived for the first voice utterance is determined at least 50 times for the first voice utterance and data derived for the second voice utterance is determined at least 50 times for the second voice utterance.

2. The method of claim 1, wherein a set of biometric voice data is extracted from the two received voice utterances and the extracted set of data is used as biometric voice data for verifying that the speaker'"'"'s voice corresponds to the specific identity and as biometric voice characteristics for determining an indicia of similarity of the two received voice utterances or for deriving data for determining the indicia of similarity of the two received voice utterances.