Method and apparatus for real-time discriminative ocular artefact removal from eeg signals
AssigneeAgency for Science, Technology and Research
InventorsXinyang Li, Cuntai Guan, Haihong Zhang, Kai Keng Ang, Zhuo Zhang
Life of this patent
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Abstract
There is provided a method and apparatus for real-time discriminative ocular artefact removal from EEG signals. This is facilitated by integrating inter-class dissimilarity and within-class similarity in a regularized framework based on oscillatory correlation. Correspondingly, components related to ocular movements are extracted from the raw data as pseudo-artefact channels so that it is applicable to single-channel EEG data without a dedicated EOG or eye-tracker.
Claims18
A system for real-time discriminate ocular artefact removal from EEG signals, the system including at least one data processor configured to:
- smoothen, at a signal smoothener, raw EEG signals;
- calculate, at a peak amplitude calculator, peak amplitudes of smoothened EEG signals;
- select, at a peak range selector, a peak range of the smoothened EEG signals;
- form, at an artefact channel former, a pseudo artefact channel;
- enable, at a discriminative learner, discriminative learning;
- and
- remove, at an artefact remover, ocular artefacts from the raw EEG signals.
A data processor implemented method for real-time discriminate ocular artefact removal from EEG signals, the method comprising:
- smoothening, at a signal smoothener, raw EEG signals;
- calculating, at a peak amplitude calculator, peak amplitudes of smoothened EEG signals;
- selecting, at a peak range selector, a peak range of the smoothened EEG signals;
- forming, at an artefact channel former, a pseudo artefact channel;
- enabling, at a discriminative learner, discriminative learning;
- and
- removing, at an artefact remover, ocular artefacts from the raw EEG signals.
A non-transitory computer readable storage medium embodying thereon a program of computer readable instructions which, when executed by one or more processors of a signal processing device, cause the signal processing device to carry out a method for real-time discriminate ocular artefact removal from EEG signals, the method embodying the steps of:
- smoothening, at a signal smoothener of the signal processing device, raw EEG signals;
- calculating, at a peak amplitude calculator of the signal processing device, peak amplitudes of smoothened EEG signals;
- selecting, at a peak range selector of the signal processing device, a peak range of the smoothened EEG signals;
- forming, at an artefact channel former of the signal processing device, a pseudo artefact channel;
- enabling, at a discriminative learner of the signal processing device, discriminative learning;
- and
- removing, at an artefact remover of the signal processing device, ocular artefacts from the raw EEG signals.
Dependencies are inferred from the claim text.