小波分析法对多带激励声码器基音提取的改进

An Improved Method of Determining the Pitch in a Multi band Excitation Vocoder by Wavelet Analysis

作者介绍了小波变换用于语音信号基音周期检测的原理，提出了基于小波变换后波形特征的基音提取算法。该算法与原多带激励声码器基音提取算法相比，能有效避开噪声的干扰，正确提取语音的基音。

This paper introduces the principles of the periodical testing of the pitch in speech signals via wavelet transforms, and presents a new algorithm for determinging the pitch with the waveform characteristics based on wavelet transforms. Compased with the MBE method, this algorithm can effectively avoid noise interference, correctly determine the pithch of speech, and significantly reduce the computational complexity.