Advanced Tutorial Lesson 13: Exploring Digital Filters - Emagtech Wiki
digital filter
P. 1 DSP-II Digital Signal Processing II Lecture 2: FIR & IIR Filter Design Marc Moonen Dept. E.E./ESAT, K.U.Leuven homes.esat.kuleuven.be/~moonen/ - ppt download
Filter (signal processing) - Wikipedia
Digital Signal Processing/Digital Filters - Wikibooks, open books for an open world