An algorithm for pitch contrail smoothing of Chinese speech
Hongli Yang · Applied science and technology · 2007
Pitch is the periodicity of vocal cord's vibrations when we pronounce the sonants.The reciprocal of frequency of vocal cord's vibration is the pitch period.It is essential to get accurate pitch period in speech signal processing.The detection of pitch period plays an important role in speech synthesis,speech coding and speech recognition.In this paper,based on the characteristics of speech signals,a new stack filtering algorithm was proposed,in which a new stack filter with proper structural elements was designed for pitch contrail smoothing of speech signal.Simulation results show that this new approach is better in dealing with the stochastic misjudged values than the combined filter based on median filter and linear filter.Furthermore,it indicates that the stack filter is suitable for speech signal research.