Method for removing lock of mobile phone screen based on short voice command and voice-print technology

A voice and mobile phone technology, applied in the field of unlocking the mobile phone screen, can solve the problems of inconvenient and fast operation, large waveform differences, and the lack of security of mobile phones

Active Publication Date: 2012-08-22
BAIDU COM TIMES TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use touch action, light judgment and other technologies to unlock the mobile phone screen, the mobile phone is not safe, anyone can unlock the mobile phone, and use password protection to unlock the mobile phone screen, although it can prevent other unauthorized users from using the mobile phone, but when operating Not convenient enough
[0003] The invention patent with the publication number of 102148899A and the publication date of 2011-8-10 is to compare the waveform of the command input by the user with the waveform (that is, the time-domain signal) of the unlocking voice command in the mobile phone system, and judge whether it matches to determine whether it is Unlocking, by comparing the waveforms to get an agreement or an 80%-100% agreement, this is impossible, because the same person tells the same word or sentence at different times, and the waveforms are also very different. Therefore, the invention not practicable

Method used

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Examples

Experimental program
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specific Embodiment

[0046] The specific embodiment of scheme one of the present invention is as follows:

[0047] A method for unlocking the screen of a mobile phone based on voice short commands and voiceprint technology, comprising a preset stage and an unlock stage, the preset stage comprising the following steps:

[0048] Step 1, the user inputs the preset voice password, and the storage form of the voice password in the mobile phone is a time domain signal;

[0049] Step 2, carry out fast Fourier transform to the audio data of the described preset voice password that preserves form as time domain signal, transform the audio data of described preset voice password into the frequency domain signal of preset voice password;

[0050] Step 3, providing a default passing threshold in the user's mobile phone system or setting a passing threshold by the user;

[0051] The unlocking stage includes the following steps:

[0052] Step 4, the user inputs the unlocking voice password, and the storage fo...

no. 1 example

[0056] The first embodiment of scheme two of the present invention is as follows:

[0057] A method for unlocking the screen of a mobile phone based on voice short commands and voiceprint technology, characterized in that it includes a preset stage and an unlock stage, and the preset stage includes the following steps:

[0058] Step 10, the user inputs the preset voice password, and the storage form of the preset voice password in the mobile phone is a time domain signal; the signal sampling rate of the preset voice password is 16000Hz;

[0059] Step 11, the audio data of the described preset voice password that will save the form as time domain signal carries out frame division and window processing, and calculates the frame number N of preset voice password; In the present embodiment, by formula N=(L 1 -20) / 10+1 is rounded down to obtain the frame number N of the preset voice password, wherein, L in the formula 1 Represent the audio duration of the preset voice password, 20...

no. 2 example

[0078] The second embodiment of scheme two of the present invention is as follows:

[0079] In this embodiment, take X=24, Y 1 =3, Y 2 =3, Z=13, K=5

[0080] A method for unlocking the screen of a mobile phone based on voice short commands and voiceprint technology, characterized in that it includes a preset stage and an unlock stage, and the preset stage includes the following steps:

[0081] Step 10, the user inputs the preset voice password, and the storage form of the preset voice password in the mobile phone is a time domain signal; the signal sampling rate of the preset voice password is 16000Hz;

[0082] Step 11, the audio data of the described preset voice password that will save the form as time domain signal carries out frame division and window processing, and calculates the frame number N of preset voice password; In the present embodiment, by formula N=(L 1 -20) / 10+1 is rounded down to obtain the frame number N of the preset voice password, wherein, L in the fo...

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PUM

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Abstract

The invention provides a method for removing lock of mobile phone screen based on a short voice command and a voice-print technology. The method comprises the steps that: in a preset stage, a user inputs preset voice passwords and executes quick fourier change so as to determine a pass threshold; and in an unlocking stage, the user inputs unlocked voice passwords and executes quick fourier changeso as to compute a difference value between an unlocked voice password frequency domain signal and a preset voice password frequency domain signal, judges whether the mobile phone is unlocked by comparing whether the difference value is smaller than the pass threshold, and unlocks the locking state of the mobile phone. the method is convenient and fast and ensures the use safety of the mobile phone; rules on the computing of the difference value are conducted on the basis, technologies containing framing and windowing, MFCC (Mel-Frequency Cepstral Coefficient) computing and vector quantization processing are introduced, so that the sound characteristics of the user can be accurately extracted and compared, and the user experience on portability and safety is improved.

Description

【Technical field】 [0001] The invention relates to a method for releasing the lock screen of a mobile phone based on voice short commands and voiceprint technology. 【Background technique】 [0002] Most of the existing mobile phones achieve the purpose of releasing the lock screen state through touch actions, light judgment, password protection and other technologies. Use touch action, light judgment and other technologies to unlock the mobile phone screen, the mobile phone is not safe, anyone can unlock the mobile phone, and use password protection to unlock the mobile phone screen, although it can prevent other unauthorized users from using the mobile phone, but when operating Not convenient enough. [0003] The invention patent with the publication number of 102148899A and the publication date of 2011-8-10 is to compare the waveform of the command input by the user with the waveform (that is, the time-domain signal) of the unlocking voice command in the mobile phone system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/725G10L17/00G10L17/22
Inventor 刘德建关胤余志鹏吴拥民
Owner BAIDU COM TIMES TECH (BEIJING) CO LTD
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