Title :
Nonlinear ECG filtering by group normalized wavelet packets
Author :
Shi, Zhuoer ; Bao, Zheng ; Jiao, Licheng ; Ma, Kun
Author_Institution :
Key Lab. for Radar Signal Process., Xidian Univ., Xi´´an, China
fDate :
29 Jun-4 Jul 1997
Abstract :
The group normalized wavelet packet transform is presented to extract ECG components from the additive noise on time-frequency tilings together with the time-frequency masking technique. FIR filters with linear phase is the natural requirement for anti-aliasing. However, linear phase compactly supported real wavelet packets are non-orthogonal so that coefficients at different scale have correlated redundancy and destroy the energy conservation. We design group-normalization to make our entropy definition follow a comparable standard
Keywords :
FIR filters; band-pass filters; electrocardiography; entropy; filtering theory; medical signal processing; noise; nonlinear filters; quadrature mirror filters; time-frequency analysis; wavelet transforms; ECG components extraction; OQMF subband filter banks; additive noise; correlated redundancy; energy conservation; entropy definition; group normalized wavelet packet transform; nonlinear ECG filtering; nonlinear phase FIR filter banks; time-frequency masking; time-frequency tilings; Electrocardiography; Electromagnetic scattering; Entropy; Filter bank; Filtering; Finite impulse response filter; Low pass filters; Nonlinear distortion; Time frequency analysis; Wavelet packets;
Conference_Titel :
Information Theory. 1997. Proceedings., 1997 IEEE International Symposium on
Conference_Location :
Ulm
Print_ISBN :
0-7803-3956-8
DOI :
10.1109/ISIT.1997.612992
