rbiowavf (Wavelet Toolbox)

Reverse biorthogonal spline wavelet filters

Syntax

```
[RF,DF]= rbiowavf(W)
```

Description

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

W = 'rbioNr.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

`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 reverse biorthogonal spline wavelet name.
      wname = 'rbio2.2';
    
% Compute the two corresponding scaling filters,
% rf is the reconstruction scaling filter and
% df is the decomposition scaling filter.
[rf,df] = rbiowavf(wname)

rf =
   -0.1250    0.2500    0.7500    0.2500   -0.1250

df =
    0.2500    0.5000    0.2500

See Also
biorfilt, waveinfo

qmf read