Dictionary:Alias filter

From SEG Wiki
Jump to: navigation, search
Other languages:
English • ‎español

A filter used before sampling to remove undesired frequencies that would otherwise alias (q.v.) in the sampling process. An alias filter should have linear phase response and nearly flat amplitude response over the signal passband and should roll off very rapidly above this band so as to provide high attenuation above the Nyquist frequency; see Figure F-9. Also called antialias filter.