Title :
Noise-robust pitch detection method using wavelet transform with aliasing compensation
Author :
Chen, S.H. ; Wang, J.F.
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
12/1/2002 12:00:00 AM
Abstract :
An improved wavelet-based method is developed for extracting pitch information from noisy speech. It uses a modified spatial correlation function which is originally applied to wavelet-based signal denoising to improve the performance of pitch detection in a noisy environment. The modified spatial correlation function needed in the proposed pitch detection method makes use of an aliasing compensation algorithm to eliminate the aliasing distortion that arises from the downsampling and upsampling operations of the wavelet transform. As a consequence, this allows one to further increase the accuracy of pitch detection. It is shown in various experimental results that this new method gives a considerable performance improvement when compared with other conventional and wavelet-based methods.
Keywords :
acoustic noise; channel bank filters; compensation; frequency estimation; interference suppression; speech processing; wavelet transforms; aliasing compensation; aliasing distortion; downsampling operations; modified spatial correlation function; noise-robust pitch detection method; noisy environment; noisy speech; pitch detection; pitch information; upsampling operations; wavelet transform; wavelet-based method; wavelet-based signal denoising;
Journal_Title :
Vision, Image and Signal Processing, IEE Proceedings -
DOI :
10.1049/ip-vis:20020242