Harnessing the Multi-Phasal Nature of Speech-EEG for Enhancing Imagined Speech Recognition

IF 2.9 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Rini Sharon;Mriganka Sur;Hema Murthy
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引用次数: 0

Abstract

Analyzing speech-electroencephalogram (EEG) is pivotal for developing non-invasive and naturalistic brain-computer interfaces. Recognizing that the nature of human communication involves multiple phases like audition, imagination, articulation, and production, this study uncovers the shared cognitive imprints that represent speech cognition across these phases. Regression analysis, using correlation metrics reveal pronounced inter-phasal congruence. This insight promotes a shift from single-phase-centric recognition models to harnessing integrated phase data, thereby enhancing recognition of cognitive speech. Having established the presence of inter-phase associations, a common representation learning feature extractor is introduced, adept at capturing the correlations and replicability across phases. The features so extracted are observed to provide superior discrimination of cognitive speech units. Notably, the proposed approach proves resilient even in the absence of comprehensive multi-phasal data. Through thorough control checks and illustrative topographical visualizations, our observations are substantiated. The findings indicate that the proposed multi-phase approach significantly enhances EEG-based speech recognition, achieving an accuracy gain of 18.2% for 25 cognitive units in continuous speech EEG over models reliant solely on single-phase data.
利用语音脑电图的多相特性增强想象语音识别
语音脑电图分析是开发无创、自然的脑机接口的关键。认识到人类交流的本质包括听、想象、发音和产生等多个阶段,本研究揭示了在这些阶段代表语音认知的共同认知印记。回归分析,使用相关指标显示明显的期间一致性。这一见解促进了从以单相为中心的识别模型向利用综合相位数据的转变,从而增强了认知语音的识别。在确定了阶段间关联的存在之后,引入了一个通用的表示学习特征提取器,该提取器擅长捕获阶段间的相关性和可复制性。这样提取的特征被观察到提供了更好的识别认知语音单位。值得注意的是,即使在缺乏全面的多阶段数据的情况下,所提出的方法也证明了弹性。通过彻底的控制检查和说明性地形可视化,我们的观察得到证实。研究结果表明,多阶段方法显著增强了基于脑电图的语音识别,与仅依赖单相数据的模型相比,连续语音脑电图中25个认知单元的准确率提高了18.2%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
5.30
自引率
0.00%
发文量
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审稿时长
22 weeks
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