Review of Zero Padding

Chapter Contents:

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Expanding on the discussion in §2.5, zero-padding is used for

Spectral interpolation
- Clearer spectral magnitude/phase plots
- Sinusoidal peak tracking (e.g., to help quadratic interpolation)
To extend to the next highest power of 2 (FFT)
To make room for ``filter ringing'' in overlap-add convolution using the FFT

Previous: Choice of WOLA Window
Next: The Filter Bank Summation (FBS) Interpretation of the Short Time Fourier Transform (STFT)

About the Author: 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.

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