Polyphase Filtering

In multirate signal processing, it is often fruitful to split a signal or filter into its polyphase components.

---

Subsections

• Two-Channel Case
• N-Channel Polyphase Decomposition
• Type II Polyphase Decomposition
• Filtering and Downsampling, Revisited
• Multirate Noble Identities

---

Order a Hardcopy of Spectral Audio Signal Processing

Previous: Filtering and Downsampling
Next: Two-Channel Case

---

written by Julius Orion Smith III
Julius Smith's background is in electrical engineering (BS Rice 1975, PhD Stanford 1983). He is presently Professor of Music and Associate Professor (by courtesy) of Electrical Engineering at Stanford's Center for Computer Research in Music and Acoustics (CCRMA), teaching courses and pursuing research related to signal processing applied to music and audio systems. See http://ccrma.stanford.edu/~jos/ for details.