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IMP submission (Wavelet software for NeXT)
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Author Message (Mladen Victor Wickerhauser)

PostPosted: Sat Dec 19, 1992 6:03 am    
Subject: IMP submission (Wavelet software for NeXT)
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IMP submission (Wavelet software for NeXT)

Use tn3270; Log in as math1 (passwd math1) at

TI: Wavelet Packet Laboratory, version 3.03 for NeXT computers
AU: David Rochberg and M. Victor Wickerhauser
IN: Washington University in St. Louis
SO: NeXT Academic Software CD-ROM
ST: Published
AB: WPLab reads ASCII collections of floating-point numbers (files with the
extension .asc) and 8-bit mu-law or 16-bit linear sounds (with a .snd
extension). Several example signals of both types are provided. Stereo
files are mixed down to mono on reading. Segments of the signal file are
plotted in the window titled "Global signal view" A tape-recorder "Play"
glyph with a wholly selected signal permits listening to the selected
segment. The transform chooser controls the selection of the transform used
to map the signal to the Time Frequency Plane: wavelet, wavelet packet, and
local sine/cosine transforms are supported. There are 17 quadrature mirror
filters (QMFs) available for wavelet packet analysis. The reconstruction
controls window offers methods of selecting coefficients according to
threshold cutoff, coefficient level (for observing the Gibbs phenomenon), or
relative ordering (top N). To reconstruct a signal from the selected
coefficients (in effect, zeroing all others), click the "Perform Inverse"
button. The reconstruction will be displayed in the "Reconstructed Signal"
window. Selecting "Save" in the menu will save the reconstruction of the
analyzed signal in one of several formats for later analysis.
DE: wavelets,signal processing,time frequency,local sine,qmf
FN: doc/techreports/
TL: compress'ed tar archive with NeXT executable and several data files
All times are GMT + 1 Hour
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