![Signal Acquisition [OpenSignals]](https://plux.info/1123-large_default/digital-filtering-pre-process-step.jpg "Signal Acquisition [OpenSignals]")
![Signal Acquisition [OpenSignals]](https://plux.info/1123-thickbox_default/digital-filtering-pre-process-step.jpg "Signal Acquisition [OpenSignals]")
NB-PP-01
In this Jupyter Notebook it will be demonstrated how to digital filter the signal.
Digital Filtering - A Fundamental Pre-Processing Step
In this Jupyter Notebook it will be demonstrated how to digital filter the signal.
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![Signal Acquisition [OpenSignals]](https://plux.info/1132-home_default/event-detection-r-peaks-ecg.jpg "Signal Acquisition [OpenSignals]")
Heart rate variability analysis is dependent of the detection of ECG R peaks, which is the main topic of the present Jupyter Notebook .
![Signal Acquisition [OpenSignals]](https://plux.info/1137-home_default/emg-analysis-time-and-frequency-parameters.jpg "Signal Acquisition [OpenSignals]")
In this Jupyter Notebook it will be explained how some parameters can be extracted from EMG, both from time and frequency domain.
In this Jupyter Notebook it will be demonstrated how to digital filter the signal.
![Signal Acquisition [OpenSignals]](https://plux.info/1125-home_default/fatigue-evaluation-evolution-of-median-power-frequency.jpg "Signal Acquisition [OpenSignals]")
Raw data contained in the generated .txt, .h5 and .edf files consists in samples and each sample value is in a raw value with 8 or 16 bits that needs to be converted to a physical unit by the respective transfer function.