biorwavf

Purpose

Biorthogonal spline wavelet filters

Syntax

• [RF,DF] = biorwavf(W)
  

Description

[RF,DF] = biorwavf(W) returns two scaling filters associated with the biorthogonal wavelet specified by the string W.

W = 'biorNr.Nd' where possible values for Nr and Nd are

Nr = 1	Nd = 1 , 3 or 5
Nr = 2	Nd = 2 , 4 , 6 or 8
Nr = 3	Nd = 1 , 3 , 5 , 7 or 9
Nr = 4	Nd = 4
Nr = 5	Nd = 5
Nr = 6	Nd = 8

The output arguments are filters.

• RF is the reconstruction filter.
• DF is the decomposition filter.

Examples

• % Set spline biorthogonal wavelet name. 
  wname = 'bior2.2'; 
  
  % Compute the two corresponding scaling filters.
  % rf is the reconstruction scaling filter.
  % df is the decomposition scaling filter. 
  [rf,rd] = biorwavf(wname)
  
  rf =
      0.2500   0.5000   0.2500
  
  df =
     -0.1250   0.2500   0.7500   0.2500 -0.1250
  

See Also

biorfilt, waveinfo

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