A wavelet packet algorithm for 1D data with no block end effects

Author

Leslie, Ben ; Sandler, Mark

Author_Institution

Dept. of Electron. Eng., King´´s Coll., London, UK

Volume

3

fYear

1999

fDate

36342

Firstpage

423

Abstract

New algorithms are presented for carrying out the wavelet packet analysis and synthesis of a one-dimensional signal which has been segmented into blocks. This is achieved on each block by using samples and transform coefficients from the previous block to carry out the filtering operations in the analysis and synthesis processes. These techniques avoid reconstruction artifacts at block boundaries. The performance is compared in an audio codec with an alternative which treats each block in isolation as a finite-length signal. The SSNR for the new algorithm is shown to average 2.5 dB better than the alternative over a range of sound samples, and is perceived to be superior in informal listening tests

Keywords

audio signal processing; codecs; signal reconstruction; wavelet transforms; 1D data; SSNR; audio codec; block end effects; filtering operations; finite-length signal; informal listening tests; one-dimensional signal; transform coefficients; wavelet packet algorithm; Codecs; Convolution; Educational institutions; Filtering; Filters; Image reconstruction; Signal processing; Signal synthesis; Wavelet analysis; Wavelet packets;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.778875

Filename

778875