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The Scientist and Engineer's
Guide to Digital Signal Processing
by Steven W. Smith
California Technical Publishing
ISBN 0-9660176-3-3 (1997)
Chapter 14. Introduction to Digital Filters
- Filter Basics
- How Information is Represented in Signals
- Time Domain Parameters
- Frequency Domain Parameters
- High-Pass, Band-Pass and Band-Reject Filters
Digital filters are used for two general purposes: (1) separation of signals that have been
combined, and (2) restoration of signals that have been distorted in some way. Analog
(electronic) filters can be used for these same tasks; however, digital filters can achieve
far superior results. The most popular digital filters are described and compared in the
next seven chapters. This introductory chapter describes the parameters you want to
look for when learning about each of these filters.
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