| Publisher | Stanford Knowledgebase | ||
|---|---|---|---|
| Format | HTML | Date added | 13 Dec 2003 |
| Topics | Sequencing / Synthesizing, Sound Recording | ||
| Downloads | 408 | ||
This tutorial describes a technique for bandlimited interpolation of discrete-time signals which supports signal evaluation at an ``arbitrary'' time, and which performs well for smoothly changing sampling rates, such as needed for digital audio ``scrubbing.'' The method is based on interpolated look-up in a table of filter coefficients, so as to make the filter impulse response available effectively in continuous-time form. A single pre-computed filter table handles all interpolation times and sampling-rate conversion ratios. Formulas are given for determining the look-up table size needed for a given precision requirement.
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