Signal Processing Toolbox Release Notes

Chapter 4
Signal Processing Toolbox 6.1 Release Notes

New Features

This section summarizes the new features and enhancements introduced in the Signal Processing Toolbox.

If you are upgrading from a release earlier than Release 13, then you should see Upgrading from an Earlier Release.

This section is organized into the following subsections:

Discrete-Time Filter Objects

Several new features have been added to discrete-time filter objects. For more information, see the dfilt reference page.

New properties--You can now include initial conditions in your dfilt objects with the States and ResetBeforeFiltering properties.
New structure--An overlap-add FFT FIR filter structure has been added. See dfilt.fftfir.
New method--The block method creates a Simulink block of the dfilt object. This method is available only if the DSP Blockset is installed.
Array handling--Some dfilt methods can now take an array of objects as input.
freqz method--The S output has been removed from the dfilt freqz method.

FDATool Enhancements

Creating M-code--You can now generate an M-file that includes code for the filter designed in FDATool. Use Generate M-file on the Targets menu. Note that this option is available only for designed filters and is disabled if you perform any other action on the filter.
Zooming--Zoom menu items have been moved from the Tools menu to the View menu. Zooming in the x- and y-directions has been added. (This change also applies to FVTool, WinTool, and WVTool.)
Complex filters--You can load complex filters into FDATool and view their step and impulse responses. (This change also applies to FVTool.)
Exporting filters as text files--Exported text files now include more information in the file header (toolbox version number and filter structure information). Only coefficients can be exported as text files.

FVTool Enhancements

Command line access--You can now control FVTool from the command line in the same manner as you control other figures using gcf. For example, you can turn on and specify the legend strings from the command line. See the fvtool reference page for more information.
Overlaying responses--You can add a second response to the analysis display.
Phase Delay--The phase delay response has been added to the available filter analyses.
Filter Information--Detailed filter information has been added to the filter analyses.
Boundary masks--You can turn on filter specification lines in the analysis display to view the ideal filter response based on your filter specifications. Note that these lines can be turned on only for displays showing the same units as the units in which the filter was designed (e.g., Magnitude(dB) for filters designed in dB, Magnitude and Zero-phase for filters designed in linear).

SPTool Enhancement--Filter Viewer

Selecting the filter viewer in SPTool now starts FVTool.

Upgrading from an Earlier Release Major Bug Fixes

Chapter 4Signal Processing Toolbox 6.1 Release Notes