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Data


Unit:SDL_wavelet
Class:TWavelet1D
Declaration:property Data[ix: integer]: double;

The array property Data has a double function: it contains the signal data or the wavelet coefficients, depending on whether you call Transform or InverseTransform.

When performing a wavelet transform the Data buffer has to contain the time series of measured data (Size samples). After the transformation the Data buffer contains the wavelet coefficients. For the inverse transform, the buffer has to contain the coefficients; after the inverse transform the buffer contains the synthesized signal.

The structure of the wavelet coefficients depends on the Size property and the number of levels used for the transform. The general layout is shown in the following figure (using a four level transform):

Example: This property is used in the following example program (see http://www.lohninger.com/examples.html for downloading the code): waveletfilter



Last Update: 2012-Oct-20