Editing Wavelet (section)

=== Scaling filter ===
An orthogonal wavelet is entirely defined by the scaling filter – a low-pass [[finite impulse response]] (FIR) filter of length 2''N'' and sum 1. In [[Biorthogonal system|biorthogonal]] wavelets, separate decomposition and reconstruction filters are defined.

For analysis with orthogonal wavelets the high pass filter is calculated as the [[quadrature mirror filter]] of the low pass, and reconstruction filters are the time reverse of the decomposition filters.

Daubechies and Symlet wavelets can be defined by the scaling filter.