基于LPC预测残差的倒谱基音检测算法分析  

LPC Predictive Residual of Speech Based Cepstral Pitch Detection Algorithm Analysis

作　　者：王翠兰[1] 李萍[2] 

机构地区：[1]东南大学,江苏南京210096 [2]漯河职业技术学院,河南漯河462002

出　　处：《南阳师范学院学报》2004年第9期26-29,共4页Journal of Nanyang Normal University

摘　　要：给出了加窗语音的新倒谱模型 ,提出了基于语音LPC预测残差的倒谱基音周期检测算法 (LP -CEP法 ) ,该算法在倒谱计算中采取高频分量置零的新措施 ,仿真研究结果表明 ,该算法相对于传统倒谱基音检测算法 (CEP法 ) ,无论是对不同的干净语音还是对不同信噪比的含噪语音 。A new cepstrum model of windowing speech ,a new speech pitch detection algorithm(LP-CEP),which uses the cepstrum of the LPC predictive residual, is proposed. The method of removing high frequency components is also used for the cepstrum calculation in this algorithm. Simulations showed that the pitch extracting results of the LP-CEP are superior to that of the conventional cepstrum algorithm both for different speeches and in different SNR of a speech.

关 键 词：基音周期 倒谱 线性预测编码 预测残差 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]