biorwavf (Wavelet Toolbox)

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

`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

biorfilt bswfun