摘要
针对信号固有奇异模态对EMD筛选构成模态混叠的问题,在提取语音浊音信号的基音成分的分析方法中,用FIR低通滤波器对信号进行预处理,使随后进行的EMD处理筛选出有物理意义的模式分量,即浊音的基音成分.并利用H ilbert变换得到了基音的时频、时能分布图.
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.
出处
《昆明理工大学学报（理工版）》
2006年第4期43-45,共3页
Journal of Kunming University of Science and Technology(Natural Science Edition)
