Real-time digital butterworth IIR filter
Project description
butter
Python implementation of the digital butterworth IIR filter
Dependencies
numpy – used for its math modules and fast array calculations
numba – used to increase calculation speed
Basic Usage
Importing the Butter module:
from butterworth import Butter
Creating the Butter instance for a lowpass butterworth filter with cutoff frequency 1000Hz and rolloff frequency 48Hz for data taken with sampling frequency 44100:
filter_ = Butter(btype="Lowpass", cutoff=1000, rolloff=48, sampling=44100)
Sending sample data into filter and retrieving the filtered data:
data=[1.0, -2.0, 3.0, . . . .] filtered_data = filter_.send(data)
Retrieving forward-backward filtered data for the accumulated data:
data1=[1.0, -2.0, 3.0, . . . .] filtered_data = filter_.send(data1) data2=[-1.0, 2.0, -3.0, . . . .] more_filtered_data = filter_.send(data2) forward_backwards_filtered_data = filter_.filtfilt()
Project details
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butterworth-0.0.1.tar.gz
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