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It is well known that linear predictive coding (LPC) is sensitive to additive noise and thatthe corresponding noise compensation method suers from poor accuracy of noise power estimation. Inthis paper, a novel noise compensation LPC method based on pitch synchronous analysis is presented.Using the proposed method, a more accurate estimation of noise power is calculated on each current frame.Experimental results show that the proposed method yields better performance than some conventionalLPC analysis methods in the presence of white noise. Keywords: LPC, pitch period, pitch synchronous, noise compensation, autocorrelation 1. IntroductionLinear predictive coding (LPC) [1] is the most com-monly used technique for speech analysis, which canestimate the spectral envelope of a voiced speech sig-nal by modeling it by a set of parameters closely re-lated to the speech production transfer function. Thetransfer function used in LPC modeling is expressedby H ( z )= G 1 − ∑ Mi =1 a i z

A Noise Compensation LPC Method Based on Pitch Synchronous Analysis for Speech