# isbiorthwfb

Determine if filter bank is biorthogonal wavelet filter bank

## Syntax

## Description

returns true if the two-channel filter bank formed from the lowpass filters
`tf`

= isbiorthwfb(`LoR,LoD`

)`LoR`

and `LoD`

satisfy the necessary and sufficient
conditions to be a two-channel biorthogonal perfect reconstruction (PR) wavelet filter bank.
`isbiorthwfb`

forms the dual highpass (wavelet) filters using the
`qmf`

function:

`HiD = qmf(LoR)`

`HiR = qmf(LoD)`

For a list of the necessary and sufficient conditions that the lowpass and highpass filters must satisfy, see Biorthogonal Perfect Reconstruction Wavelet Filter Bank.

## Examples

## Input Arguments

## Output Arguments

## More About

## References

[1] Strang, Gilbert, and Truong
Nguyen. *Wavelets and Filter Banks*. Rev. ed. Wellesley, Mass:
Wellesley-Cambridge Press, 1997.

[2] Burrus, C. S., Ramesh A. Gopinath,
and Haitao Guo. *Introduction to Wavelets and Wavelet Transforms: A
Primer*. Upper Saddle River, N.J: Prentice Hall, 1998.

## Extended Capabilities

## Version History

**Introduced in R2022b**