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Multi-stage linear predictive analysis method for feature extraction from acoustic signals
Multi-stage linear predictive analysis method for feature extraction from acoustic signals
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机译:从声信号中提取特征的多阶段线性预测分析方法
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摘要
Features are extracted from a sampled input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selected using information entropy values representing the information content of the residuals of the second linear predictive analyses. One or more optimum second orders q are selected on the basis of changes in these information entropy values. The optimum first and second orders are output as features. Further linear predictive analyses can be carried out to obtain higher-order features. Useful features are obtained even for nonstationary input signals.
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