Information on wavelets.
Syntax
waveinfo
waveinfo('wname')
Description
waveinfo gives information on all wavelets.
waveinfo('wname') gives information on the wavelet family whose short name is specified by the string 'wname'. Available family short names are:
'haar'
|
:
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Haar wavelet.
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'db'
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:
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Daubechies wavelets.
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'sym'
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:
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Symlets.
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'coif'
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:
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Coiflets.
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'bior'
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:
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Biorthogonal wavelets.
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'meyr'
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:
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Meyer wavelet.
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'mexh'
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:
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Mexican hat wavelet.
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'morl'
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:
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Morlet wavelet.
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or user-defined short names for their own wavelet families (see wavemngr).
waveinfo('wsys') gives information on wavelet packets.
Examples
waveinfo('db')
DBINFO Information on Daubechies wavelets.
Daubechies Wavelets
General characteristics: Compactly supported
wavelets with extremal phase and highest
number of vanishing moments for a given
support width. Associated scaling filters are
minimum-phase filters.
Family Daubechies
Short name db
Order N N strictly positive integer
Examples db1 or haar, db4, db15
Orthogonal yes
Biorthogonal yes
Compact support yes
DWT possible
CWT possible
Support width 2N-1
Filters length 2N
Regularity about 0.2 N for large N
Symmetry far from
Number of vanishing moments for psi N
Reference: I. Daubechies,
Ten lectures on wavelets CBMS, SIAM, 61, 1994, 194-202.
See Also
wavemngr
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