Speaker voice playback identification method and system based on environmental noise change detection

A technology for environmental noise and change detection, applied in speech analysis, instruments, etc., can solve problems such as poor robustness and strong text dependence, and achieve the effect of preventing potential safety hazards and improving safety assurance.

Active Publication Date: 2017-03-22
HUBEI UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

The main system of this method is based on the change of environmental noise before and after recording playback, and then detects whether it is a recording playback, which can be used to identify whether it is the voice of an authenticated user with a real identity, thereby solving the problem of the robustness of the speaker recording playback intrusion detection method in the existing ASV system. Poor performance, strong text dependence and other shortcomings, providing technical support for the wider application and promotion of ASV system

Method used

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  • Speaker voice playback identification method and system based on environmental noise change detection
  • Speaker voice playback identification method and system based on environmental noise change detection

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Embodiment

[0034] In the embodiment of the present invention, the collection of the speaker's voice equipment is realized through the high-fidelity audio collection equipment, and the processing of the voice signal is implemented in the form of software.

[0035] Such as figure 1 Shown: the speaker's recording playback identification method based on environmental noise change detection in the embodiment of the present invention, it comprises the following steps:

[0036] S1. Preprocessing the background environment speech signal. This step realizes the measurement and preprocessing of the speech signal before the speech signal to be detected is input. First, select a section of speech signal (environmental noise) before a certain time before the speech signal to be tested by preset value, and eliminate the abrupt signal in the signal by filtering; then extract the power spectrum feature of the filtered signal;

[0037] S2. Divide the silent segment of the speech signal to be tested. Thi...

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Abstract

The invention relates to a speaker voice playback identification method and an identification system, in particular to a speaker voice playback identification method and an identification system based on environmental noise change detection. According to the identification method and the identification system provided by the invention, on the basis of environmental noise change before and after to-be-detected voice, it detects whether new noise (including noise introduced due to play equipment channel characteristics) is introduced with the playing of voice recording equipment or not so as to judge whether it is playback or not, so that playback attack detection of an ASV (automatic speech verification) system is implemented in voice detection independent of a specific text, potential safety risks of the ASV system due to playback attack are avoided and the safety guarantee of voice print recognition is completed; and meanwhile, by detecting the play equipment, an assisting effect is also achieved on the detection of speech synthesis invasion and speech switching invasion.

Description

technical field [0001] The invention relates to a speaker voice playback identification method and system, and particularly relates to a speaker voice playback identification method and system based on environmental noise change detection. Background technique [0002] With the continuous development of speech signal processing technology, the identity authentication system using the characteristics of the speaker's speech signal has been widely used in many industries. However, although the Automatic Speaker Verification (ASV) system has been applied in fields such as access control systems, financial securities, online shopping, electronic banking, mobile phone authentication, etc., the reliability of the system still has a large security risk. The main artificial threat comes from the intruder's use of technical means to pretend to be the voice of the target speaker to "deceive" the ASV system and pass the authentication. In recent years, how to effectively detect and id...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L17/02G10L25/21G10L25/51G10L25/84
CPCG10L17/02G10L25/21G10L25/51G10L25/84
Inventor 张帆张良
Owner HUBEI UNIV
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