Design of Optimal Wavelet Packet Trees Based on Auditory Perception Criterion

Author

Karmakar, Abhijit ; Kumar, Arun ; Patney, R.K.

Author_Institution

Central Electron. Eng. Res. Inst., Pilani

Volume

14

Issue

4

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

240

Lastpage

243

Abstract

A criterion is proposed to obtain an optimal wavelet packet (WP) tree based on the critical band structure of the human auditory system for time-frequency decomposition of speech and audio signals. The criterion minimizes a perceptual cost function based on Zwicker´s model of the critical band structure and allocates an optimal number of terminating nodes at different decomposition depths of the WP tree. The criterion is used to obtain the optimal WP tree and the corresponding critical band ordered wavelet packet basis for some typical sampling frequencies

Keywords

audio signal processing; hearing; signal sampling; speech processing; time-frequency analysis; trees (mathematics); wavelet transforms; Zwicker´s model; audio signal; auditory perception criterion; cost function; sampling frequency; speech signal; time-frequency decomposition; wavelet packet trees; Auditory system; Bandwidth; Cost function; Discrete wavelet transforms; Filters; Humans; Signal design; Speech; Time frequency analysis; Wavelet packets; Auditory perception; Bark scale; critical band; optimal wavelet packet basis; wavelet packet tree;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2006.884129

Filename

4130399