Title :
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
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;
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
DOI :
10.1109/ISCAS.1999.778875
