Analytical Research on the Pitch of Speech Signal Based on EMD
Haiyan Quan · Journal of Kunming University of Science and Technology · 2006
In EMD method,the abrupt mode function of the signal will destroy sifting process,therefore,the mode function with physical concept cannot be achieved.Firstly the sonant in speech signal is processed with FIR low pass filter to filter out the abrupt mode function.Then it is sifted with EMD.In this way,the mode function with physical concept,the pitch component,can be obtained.At last Hilbert transform is used to get the instant time frequency distribution and time magnitude distribution of the pitch.