关键词: 基音检测, 倒谱法, 线性预测残差, 谐波积谱

Abstract: A novel method of pitch detection,combining LPC-based cepstrum and Harmonic Product Spectrum（HPS）,has been proposed.We use linear prediction residual to eliminate the vocal tract information to improve the accurate.In real world,when the speech signal has been transmitted through the telephone system,low frequency including much pitch information have been cutoff,which can significantly attenuate the fundamental pitch frequency.In this paper,we combine LPC-based cepstrum and HPS to deal with this problem and pitch errors.Experiment studied indicates that this novel method is very effective and valuable for application,since it robustly handles noise and pitch errors.

Key words: pitch detection, cepstrum, Harmonic Product Spectrum（HPS）, linear prediction residual