Design of Pitch Extraction by leveled Spectrum Autocorrelation
WU Feng-xiang · Journal of Pingdingshan Institute of Technology · 2007
The difficulties and methods for pitch extraction are discussed briefly in this paper.The pitch extraction is implemented by leveled spectrum autocorrelation.The corresponding pitch detector is designed with corrective measures for peak detection at the terminal points.A varying threshold for peak detection is proposed.The u/v decision is made by the assistance of the power and zero crossing rate in a frame.At last,the pitch is smoothed.In this way the overall accuracy of pitch extraction is increased.