What is Digital filter?
In the context of [[digital signal processing]] a '''digital filter''' is there to change a signal. An example of a filter might be to only let certain frequency bands pass, or to block these bands. The signal will be sampled, and discrete in time. Unlike [[analog filter]]s, digfital filters use logical components, while analog filters use electrical circuits. Very often, the signal is transoformed from analog to digtal before filtering, and then transformed back after filtering. [[Category:Digital signal processing]]