Title :
Transient modeling by matching pursuits with a wavelet dictionary for parametric audio coding
Author :
Vera-Candeas, P. ; Ruiz-Reyes, N. ; Rosa-Zurera, M. ; Martinez-Muñoz, D. ; Lopez-Ferreras, F.
Author_Institution :
Electron. Dept., Univ. of Jaen, Spain
fDate :
3/1/2004 12:00:00 AM
Abstract :
In this letter, we propose a novel matching pursuit-based method for transient modeling with application to parametric audio coding. The overcomplete dictionary for the matching pursuit is composed of wavelet functions that implement a wavelet-packet filter bank. The proposed transient modeling method is suitable to be integrated into a parametric audio coder based on the three-part model of sines, transients, and noise (STN model). Comparative analysis between wavelet and exponentially damped sinusoidal functions are shown in experimental results. The mean-squared-error performance of the proposed approach is better than that obtained with damped sinusoids.
Keywords :
audio coding; channel bank filters; iterative methods; mean square error methods; wavelet transforms; audio coding; exponentially damped sinusoidal function; matching pursuit-based method; mean-squared-error performance; parametric audio coder; sine-transient-noise three-part model; transient modeling method; wavelet dictionary; wavelet function; wavelet-packet filter bank; Audio coding; Dictionaries; Discrete wavelet transforms; Feature extraction; Filter bank; Matching pursuit algorithms; Signal processing; Transform coding; Wavelet analysis; Wavelet packets;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2003.822904
