Summary
- Plugin name : Temporal Filter
- Version : 1.1
- Author : Yann Renard & Laurent Bonnet
- Company : Mensia Technologies SA
- Short description : Temporal filtering based on various one-way IIR filter designs
- Documentation template generation date : Jan 9 2018
Description
Applies a temporal filter, based on various one-way IIR filter designs, to the input stream.
This plugin is used to filter the input signal. This plugin allows the selection of the kinf of filter (Butterworth, Chebychev, Yule-Walker), the kind of filter (low-pass, high-pass, band-pass, band-stop), the low or/and the high edge of the filter, and the passband ripple for the Chebychev filter.
Inputs
1. Input signal
The input signal.
- Type identifier : Signal (0x5ba36127, 0x195feae1)
Outputs
1. Output signal
The filtered signal.
- Type identifier : Signal (0x5ba36127, 0x195feae1)
Settings
1. Filter Method
Select the name of filter between Butterworth, Chebychev and Yule-Walker.
- Type identifier : Filter method (0x2f2c606c, 0x8512ed68)
- Default value : [ Butterworth ]
2. Filter Type
Select the kind of filter between low-pass, high-pass, band-pass, band-stop.
- Type identifier : Filter type (0xfa20178e, 0x4cba62e9)
- Default value : [ Band Pass ]
3. Filter Order
Order of the filter, with .
- Type identifier : Integer (0x007deef9, 0x2f3e95c6)
- Default value : [ 4 ]
4. Low Cut-off Frequency (Hz)
Low cut-off frequency for high-pass, band-pass and band-stop filters (not used with low-pass filter). Low cut-off frequency can not be above Nyquist-Shannon criteria (half of the sampling rate).
- Type identifier : Float (0x512a166f, 0x5c3ef83f)
- Default value : [ 1 ]
5. High Cut-off Frequency (Hz)
High cut-off frequency for low-pass, band-pass and band-stop filters (not used with high-pass filter). For band-pass and band-stop filters, . High cut-off frequency can not be above Nyquist-Shannon criteria (half of the sampling rate).
- Type identifier : Float (0x512a166f, 0x5c3ef83f)
- Default value : [ 40 ]
6. Band Pass Ripple (dB)
If Chebychev filter is selected, pass band ripple in dB is a necessary information.
- Type identifier : Float (0x512a166f, 0x5c3ef83f)
- Default value : [ 0.5 ]
Examples
Let's consider our input signal is very noisy (50 Hz). To filter this signal, select a Low pass Butterworth filter of 4th order and High Edge equal to 30 Hz for example.
Miscellaneous
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