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Binaural speech separation method based on support vector machine

A technology of support vector machine and speech separation, applied in speech analysis, computer parts, instruments, etc., can solve the problems of loss of separated speech and audio points, unsatisfactory performance, etc.

Active Publication Date: 2018-05-29
SOUTHEAST UNIV
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Problems solved by technology

At present, the performance of commonly used binaural speech separation methods in complex acoustic environments is still unsatisfactory, and there is a phenomenon that the audio points of separated speech are lost

Method used

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  • Binaural speech separation method based on support vector machine
  • Binaural speech separation method based on support vector machine
  • Binaural speech separation method based on support vector machine

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Embodiment Construction

[0087] Such as figure 1 As shown, the support vector machine SVM speech separation method provided by the present embodiment includes the following steps:

[0088] Step 1: Convolve the training single-sound source speech signal with head-related impulse response function HRIR at different azimuths to generate multiple single-sound source binaural sound signals at different azimuths. Among them, the azimuth angle of the sound source is represented by θ, which defines that the front of the horizontal plane is 0°, and the range of θ is [-90°, 90°], with an interval of 10°, where -90° means the front left, and 90° means directly to the right;

[0089] Head-Related Impulse Response HRIR (Head-Related Impulse Response) is the time-domain representation of Head-Related Transfer Function (HRTF). The present invention adopts the HRTF database released by the Media Laboratory of Massachusetts Institute of Technology, which contains HRIR data of different elevation angles and different...

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Abstract

The invention discloses a binaural speech separation method based on a support vector machine. The method comprises the steps that after a binaural signal passes through a Gammatone filter, the interaural time difference ITD and the parameter interaural intensity difference IID of each sub-band acoustic signal are extracted; in a training phase, the sub-band ITD and IID parameters extracted from apure mixed binaural signal containing two sound sources are used as the input features of the support vector machine SVM, and the SVM classifier of each sub-band is trained; and in a test phase, in an environment with reverberation and noise, the sub-band features of a test mixed binaural signal containing two sound sources are extracted, and the SVM classifier of each sub-band is used to classify the feature parameters of each sub-band to separate each sound source in mixed speech. According to the invention, the method is based on the classification capability of the support vector machinemodel; robust binaural speech separation in a complex acoustic environment is realized; and the problem of frequency point data loss is effectively solved.

Description

technical field [0001] The invention relates to a speech separation method, in particular to a binaural speech separation method based on a support vector machine. Background technique [0002] Support Vector Machine (Support Vector Machine, SVM) is a binary classification model, which is a linear classifier with the largest interval defined in the feature space, and can achieve nonlinear classification by using different kernel functions. It shows many unique advantages in solving small sample, nonlinear and high-dimensional pattern recognition. At present, the performance of commonly used binaural speech separation methods in complex acoustic environments is still unsatisfactory, and there is a phenomenon of loss of separated speech audio points. Contents of the invention [0003] Purpose of the invention: the present invention aims at the problems existing in the prior art, and based on the high-dimensional and nonlinear classification capabilities of SVM, a binaural s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0308G06K9/62
CPCG10L21/0308H04S2420/01G06F18/2411
Inventor 周琳庄琰王立杰李楠
Owner SOUTHEAST UNIV
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