T. P. Traitement du Signal Maîtrise E.E.A. - LASC

SPTool: An Interactive Signal Processing Environment
SPTool: An Interactive Signal Processing Environment
SPTool is an interactive GUI for digital signal processing that can be used to
• Analyze signals
• Design filters
• Analyze (view) filters
• Filter signals
• Analyze signal spectra
You can accomplish these tasks using four GUIs that you access from within
SPTool:
• The Signal Browser is for analyzing signals. You can also play portions of
signals using your computer’s audio hardware.
• The Filter Designer is for designing or editing FIR and IIR digital filters.
Most of the Signal Processing Toolbox filter design methods available at the
command line are also available in the Filter Designer. Additionally, you can
design a filter by using the Pole/Zero Editor to graphically place poles and
zeros on the z-plane.
• The Filter Visualization Tool is for analyzing filter characteristics. See
“Filter Visualization Tool” on page 6-14.
• The Spectrum Viewer is for spectral analysis. You can use the Signal
Processing Toolbox spectral estimation methods to estimate the power
spectral density of a signal. See “Spectrum Viewer” on page 6-18.
SPTool Data Structures
You can use SPTool to analyze signals, filters, or spectra that you create at the
MATLAB command line.
You can bring signals, filters, or spectra from the MATLAB workspace into the
SPTool workspace using the Import item under the File menu. Signals, filters,
or spectra that you create in (or import into) the SPTool workspace exist as
MATLAB structures. See the MATLAB documentation for more information on
MATLAB structures.
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