The extraction of features of Voiceprint Recognition System. The paper describes the sound channel model, Linear Predictive Coding ( LPC ), Linear Predictive Cepstral Coefficients and Mel-Frequency Cepstral Coefficients. 2. 详细阐述了声道模型、线性预测编码(LPC)分析、LPC倒谱系数、Mel倒谱系数的求解;2、声纹识别的识别方法和模型。