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Owning Palette: Filter Banks VIs

Installed With: Advanced Signal Processing Toolkit

Provides the coefficients of the analysis filters and the synthesis filters for some commonly used wavelets or reads the analysis filters and the synthesis filters from a text file. The predefined wavelets include orthogonal wavelets (Haar, Daubechies, Coiflets, Symmlets) and biorthogonal wavelets (FBI, Biorthogonal).

Examples

	wavelet specifies the wavelet type. The default is db02. If you want to use a wavelet saved in a file, do not wire this input. Instead, set read from file? to TRUE.
	read from file? specifies to read the filter coefficients from a file. The default is FALSE. The file must store the lowpass analysis filter, the highpass analysis filter, the lowpass synthesis filter, and the highpass synthesis filter in four separate lines in that order.
	swap specifies to swap the analysis filters and the synthesis filters internally in this VI. The default is FALSE.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	wavelet name is the name of the wavelet or filename.
	analysis filters contains the coefficients of the lowpass analysis filters and the highpass analysis filters for the wavelet you specify. lowpass contains the coefficients of the lowpass analysis filter. highpass contains the coefficients of the highpass analysis filter.
	synthesis filters contains the coefficients of the lowpass synthesis filters and the highpass synthesis filters for the wavelet you specify. lowpass contains the coefficients of the lowpass synthesis filter. highpass contains the coefficients of the highpass synthesis filter.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Examples

Refer to the following VIs for examples of using the WA Wavelet Filter VI:

• ECG Compression VI: labview\examples\Wavelet Analysis\WAApplications.llb
• Filter Banks - 2D VI: labview\examples\Wavelet Analysis\WAGettingStarted.llb
• Mother Wavelet and Scaling Function VI: labview\examples\Wavelet Analysis\WAGettingStarted.llb
• Wavelet Order Selection VI: labview\examples\Wavelet Analysis\WAGettingStarted.llb
• Wavelet Packet Signal Compression VI: labview\examples\Wavelet Analysis\WAApplications.llb