Title :
The sonagram of audio signal based on the wavelet packet transform
Author :
Wang, Dawei ; Wu, Xu ; Xiao, Qing ; Li, Dongfeng
Author_Institution :
Dept. of Phys., Northeastern Normal Univ., China
Abstract :
A method based on the wavelet packet transform for obtaining the sonagram of audio signals with high resolution is presented in this paper. The time-frequency localization and multiresolution analysis of the wavelet packets are discussed. The tree decomposition algorithm is applied for selecting the best basis in order to decompose a given signal into resume and detail. The original signal is reconstructed exactly from a few coefficients as well. Theoretical analysis and computer simulations show that wavelet packets have good localization in both time and frequency and offer a valuable means for analyzing the feature of a signal in the sonagram
Keywords :
audio signal processing; signal reconstruction; signal resolution; time-frequency analysis; wavelet transforms; audio signal; multiresolution analysis; signal reconstruction; sonagram; time-frequency localization; tree decomposition algorithm; wavelet packet transform; Fourier transforms; Multiresolution analysis; Physics; Resumes; Signal analysis; Signal resolution; Time frequency analysis; Wavelet analysis; Wavelet packets; Wavelet transforms;
Conference_Titel :
Circuits and Systems, 2000. IEEE APCCAS 2000. The 2000 IEEE Asia-Pacific Conference on
Conference_Location :
Tianjin
Print_ISBN :
0-7803-6253-5
DOI :
10.1109/APCCAS.2000.913625
