DSP filters
| Stable release: | unreleased |
|---|---|
| Status: | first version |
| Maintainer: | https://github.com/henkmuller |
| Description: | A collection of standard DSP building blocks |
Key Features
- Generic cascaded biquad filter
- Generator for filter values
- Generic FIR
- Asynchronous Sample Rate converter
To Do
- Optimised biquad
- Optimised FIR
- On-the-fly computation of coefficients
- Optional dithering
Firmware Overview
This repo intends to store a set of algorithms to perform standard DSP functions, enabling people to implement, for example, graphic equalisers or sample rate converters. At present, only a cascaded biquad and a FIR filter are implemented, together with programs to compute coefficients and response curves. Coefficients and response curves for the biquad are computed based on algorithms by Robert Bristow-Johnson.
The current FIR code is written for readability - less readable (more efficient) versions to follow. The generic versions check on overflow and saturate (intermediate) results.
Known Issues
- Makefile should invoke biquad generator properly - currently relies on java and javac, and currently recreates files unnecessarily.
Required Repositories
- xcommon [email protected]:xcore/xcommon.git
Support
Issues may be submitted via the Issues tab in this github repo. Response to any issues submitted as at the discretion of the maintainer for this line.