| Version 4.1 (R2007a) Filter Design Toolbox™ Release Notes | |
This table summarizes what's new and changed in Version 4.1(R2007a):
New Features and Changes | Version Compatibility Considerations | Fixed Bugs and Known Problems | Related Documentation at Web Site |
|---|---|---|---|
Yes | No | Printable Release Notes: PDF |
New features and changes introduced in this version are described here.
Fdesign Support Added for Octave Band and Fractional Octave Band Filters
Support for Fixed-point Inputs and Tunable Parameters in Filter Design Toolbox™ Blocks
Octave-band and fractional-octave-band filters are commonly used in acoustics, for example, in noise control to perform spectral analysis. You can design octave band and fractional octave band filters using the fdesign function fdesign.octave. If you prefer to design these filters using a graphical approach, try the filterbuilder function.
Parametric equalizers are digital filters used in audio for adjusting the frequency content of a sound signal. The Filter Design Toolbox™ provides the capability to design high-order IIR parametric equalizers. Such high-order designs provide much more control over the shape of each filter. You can design parametric equalizer filters using the fdesign function fdesign.parameq. The same functionality can be achieved through the GUI function filterbuilder.
Filters that peak or notch at a certain frequency are useful to retain or eliminate a particular frequency component of a signal. You can design these peak or notch filters using the new functions fdesign.peak and fdesign.notch. The same functionality can be achieved through the GUI function filterbuilder.
When designing a multirate filter, you can specify the response of the resulting filter. Arbitrary magnitude as well as arbitrary magnitude and phase are two responses that have been added to an already extensive list. To understand how to use these responses when designing multirate filters, see fdesign.rsrc, fdesign.decimator, and fdesign.interpolator.
The blocks in the Filter Design Toolbox library of Signal Processing Blockset™ now support fixed-point and integer data types on their input and output ports. In addition, parameters of these blocks that do not change filter order or structure are now tunable. This feature is fully described in the "Signal Processing Blockset User's Guide".
| Version 4.2 (R2007b) Filter Design Toolbox™ | Version 4.0 (R2006b) Filter Design Toolbox™ | |
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