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Voiceprint password authentication method and system

A password authentication and voiceprint technology, applied in the field of password authentication, can solve the problems of low discrimination, inaccurate model description, affecting the accuracy of password authentication, etc., and achieve the effect of improving the accuracy.

Active Publication Date: 2011-11-09
IFLYTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this general background model has good universality, the model description is not precise enough, and the degree of discrimination is low, which affects the accuracy of password authentication to a certain extent.

Method used

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  • Voiceprint password authentication method and system
  • Voiceprint password authentication method and system

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Embodiment Construction

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0071] Such as figure 1 Shown is a flow chart of the voiceprint password authentication method of the embodiment of the present invention, including the following steps:

[0072] Step 101, receiving a voice signal entered by a logged-in user.

[0073] Step 102, extracting a voiceprint feature sequence in the voice signal.

[0074] The voiceprint feature sequence includes a set of voiceprint features, which can effectively distinguish different speakers and remain...

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Abstract

The invention discloses a voiceprint password authentication method and a voiceprint password authentication system. The method comprises the following steps of: receiving a voice signal recorded by a login user; extracting a voiceprint characteristic sequence from the voice signal; performing voice recognition on the voice signal to obtain the password contents of the login user; if the obtained password contents are different from a registration password text, determining the login user is an unauthenticated user; otherwise computing likelihood between the voiceprint characteristic sequence and each of a speaker voiceprint mode corresponding to the login user and a background model selected for the login user, wherein the background model comprises a text-unrelated universal background model and a text-related optimized background model; computing a likelihood ratio according to the obtained likelihood; and if the likelihood is greater than a preset threshold value, determining the login user is an effectively authenticated user, otherwise determining the login user is the unauthenticated user. By the method and the system, the voiceprint password authentication accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of password authentication, in particular to a voiceprint password authentication method and system. Background technique [0002] Voiceprint recognition (Voiceprint Recognition, VPR) is also called speaker recognition, and there are two types, namely, speaker identification and speaker confirmation. The former is used to judge which of several people said a certain speech, which is a "multiple choice" problem; while the latter is used to confirm whether a certain speech is spoken by a specified person, which is "one-to-one discrimination". "question. Different tasks and applications use different voiceprint recognition technologies. [0003] Voiceprint authentication refers to confirming the identity of the speaker based on the collected voice signal, which is a "one-to-one" discrimination problem. Today's mainstream voiceprint authentication system adopts a framework based on hypothesis testing, by calc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/32G10L17/00
Inventor 何婷婷胡国平胡郁王智国刘庆峰
Owner IFLYTEK CO LTD
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