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.


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Inputs/Outputs

  • ccclst.png WP session —

    WP session specifies a reference to an existing wavelet packet structure.

  • cu64.png ref —

  • catrn.png t0 —

  • cdbl.png dt —

  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • icclst.png WP session out —

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

  • iu64.png ref —

  • iatrn.png t0 —

  • idbl.png dt —

  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.

    • 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, this 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.

    Examples

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