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Method for recognizing voice print

A voiceprint recognition and recognition method technology, applied in character and pattern recognition, analog computer, analog and hybrid computing, etc., can solve problems such as application difficulties and inability to adapt to requirements, and achieve the effect of low error rate

Inactive Publication Date: 2003-10-08
BEIJING D EAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Obviously, the setting of the threshold θ is very critical for recognition rejection, and because it is usually preset, it sometimes cannot meet the requirements of practical applications
[0017] The main problem of the existing rejection methods is that the rejection threshold is fixed, which brings difficulties to the setting of the threshold and the application of the voiceprint recognition system in different hardware and software environments.

Method used

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  • Method for recognizing voice print

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Embodiment Construction

[0041] A voiceprint recognition method proposed by the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments, as well as the application:

[0042] Embodiments of the voiceprint recognition method of the present invention, such as image 3 (a)- image 3 As shown in (c), two types of voiceprint recognition methods including the model training method and voiceprint identification and voiceprint confirmation are described as follows in conjunction with the accompanying drawings:

[0043] The model training method of this embodiment is as follows: image 3 Shown in (a), its specific steps include:

[0044] 1) Take the voice data of a speaker, analyze its original voice waveform data, and throw away each silent segment therein;

[0045] 2) Take the frame width of 32 milliseconds and half of the frame width as the frame shift, extract 16-dimensional linear predictive cepstral parameters (LPCC) for each frame, and calculat...

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Abstract

This invention relates to method for identifying and confirming an identity by the soundwave information of mankind including a model training method and a soundwave identification method characterizing in that every speaking person makes up of soundwave model: M=***, the character vector sequence to be identified x'={X1,...XT} matching with the speaking person soundwave model M=*** gets marks (log likelihood) as 1:s(x' / M)=***. This invention can adjust threshold value of an operation point according to different requirements to reach the highest accurate rate.

Description

technical field [0001] The invention belongs to the technical field of computers and information services, in particular to a method for identifying and confirming identities through human voiceprint information. Background technique [0002] Voiceprint Recognition (Speaker Recognition), that is, Speaker Recognition, is to identify who is speaking a certain voice based on the biological characteristics of the speaker contained in the human voice, which is the so-called "knowing people by hearing the sound". ". Voiceprint recognition can be used in almost all security protection fields and personalization applications that require identification or confirmation. For example: (1) voiceprint identification: criminal investigation, criminal tracking, national defense monitoring, personalized applications, etc.; (2) voiceprint confirmation: securities transactions, bank transactions, public security forensics, voice-activated locks for personal computers and cars, ID cards, cred...

Claims

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Application Information

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IPC IPC(8): G06G7/22G06K9/46
Inventor 郑方宋战江
Owner BEIJING D EAR TECH
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