filtfilthd

Zero-phase forwards/backwards filtering using SP toolbox dfilt filter objects

Description

FILTFILTHD provides zero-phase forwards/backwards filtering. Unlike MATLAB's filtfilt, FILTFILTHD accepts dfilt filter objects on input.
This allows multiple stage filters from fdatool to be used.

A selection of end-effect minimization methods are supported.

• Required Products: Signal Processing Toolbox
• MATLAB release: MATLAB 7.5 (R2007b)

[Gunter Wahl]

 

[ueli r.]

exactly what i needed

[Keith]

Provides a solution to the limited resolution of the matlab transfer function filter forms when calling filtfilt. Filter objects can be created with zero pole gain prototypes, converted to second order sections and avoid the numerical precision problems associated with [b,a] transfer functions but allow use of filtfilt to eliminate phase distortion.

[chairmanK]

Excellent! I hope that Mathworks incorporates this functionality into the dfilt class in the next release of the Signal Processing Toolbox.

[Mark Proulx]

This function is sensational! I've been learning how to use filter objects, and really like the concept. I was discouraged, therefore, when I realized that the standard 'filtfilt' function only works with the transfer function form. This routine is precisely what I needed!

[Daniel Golden]

A lovely little program that solved my problem!

[Ede]

Sweet, thanks!
However, I am running in trouble when using it with parfor. Does anyone know why?