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Owning Palette: Wavelet Packet VIs

Installed With: Advanced Signal Processing Toolkit

Searches for the optimal decomposition tree based on the minimum entropy criterion, which is the smallest value of the total entropy of all terminal nodes at a certain level in all the possible tree structures.

Details  Example

	WP session is a reference to an existing wavelet packet structure.
	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.
	WP session out contains a reference to an existing wavelet packet structure, which this VI can modify.
	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.

WA WP Best Tree Details

The entropy associated with each node of the wavelet packet tree is computed at the decomposition stage. For certain levels of wavelet packet decomposition, the VI searches the best decomposition structure according to the minimum entropy criterion. The resulting decomposition tree structure is called the best tree. Refer to A Wavelet Tour of Signal Processing for more information about decomposition trees.

Example

Refer to the Wavelet Packet - Entropy Selection VI in the labview\examples\Wavelet Analysis\WAGettingStarted.llb for an example of using the WA WP Best Tree VI.