rt_noise.h File Reference

Real-time noise power-spectral-density estimation from streaming data blocks. More...

#include "../dsp_global.h"
#include <fiff/fiff_info.h>
#include <QThread>
#include <QMutex>
#include <QSharedPointer>
#include <Eigen/Core>

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Classes
class	RTPROCESSINGLIB::RtNoiseWorker
	Background worker that computes a noise power spectral density estimate from accumulated data blocks. More...
class	RTPROCESSINGLIB::RtNoise
	Controller that manages RtNoiseWorker for real-time noise spectrum estimation. More...

Namespaces
namespace	RTPROCESSINGLIB

Detailed Description

Real-time noise power-spectral-density estimation from streaming data blocks.

SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2026 MNE-CPP Authors

Author

Christoph Dinh chris.nosp@m.toph.nosp@m..dinh.nosp@m.@mne.nosp@m.-cpp..nosp@m.org

Since

2.1.0

Date

March 2026

RtNoiseWorker accumulates a configurable number of contiguous data blocks, splits them into complete FFT-length segments and averages their Hann-windowed periodograms into a one-sided PSD in dB re unit^2/Hz, the same estimate as scipy.signal.welch with no overlap and no detrending. Longer accumulation windows trade temporal responsiveness for spectral variance reduction. RtNoise is the QObject front-end that owns the worker, forwards configuration changes, and re- emits the PSD result back on the GUI thread.

This estimate is what feeds the live noise-spectrum display and provides a sanity-check companion to RTPROCESSINGLIB::RtCov whenever a quick frequency-domain view of the noise floor is more informative than the full channel–channel covariance matrix.

Definition in file rt_noise.h.