VEP-Based Brain-Computer Interfaces: Time, Frequency, and Code Modulations
VEP-Based Brain-Computer Interfaces: Time, Frequency, and Code Modulations
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基于 VEP 的脑机接口：时间、频率和代码调制
DOI：
10.1109/mci.2009.934562
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发表时间：
2009-11-01
影响因子：
9
通讯作者：
Gao, Shangkai
中科院分区：
文献类型：
--
作者：
Bin, Guangyu;Gao, Xiaorong;Gao, Shangkai
脑机接口（BCI）将人类的意图转化为控制信号，以在人脑和外部设备之间建立直接的通信通道。由于脑机接口不依赖于周围神经和肌肉的大脑正常输出通路，它可以为严重运动障碍的人提供一个新的沟通渠道。从头皮表面记录的脑电图（EEG）因其无创性和易于应用而广泛用于当前的脑机接口中。在基于脑电的脑机接口中，基于视觉诱发电位（VEP）的脑机接口系统近几十年来受到了广泛的关注。我们描述了当前基于VEP的脑机接口中使用的三种刺激调制方法：时间调制（t-VEP）、频率调制（f-VEP）和伪随机码调制（c-VEP）。然后，我们对f-VEP BCI和c-VEP BCI之间的系统性能进行了详细的比较。结果表明，f-VEP脑机接口具有无需训练或训练量少、系统结构简单等优点，而c-VEP脑机接口具有更高的通信速度。刺激调制设计是基于视觉诱发电位的脑机接口系统的关键。
A brain computer interface (BCI) translates human intentions into control signals to establish a direct communication channel between the human brain and external devices. Because a BCI does not depend on the brain's normal output pathways of peripheral nerves and muscles, it can provide a new communication channel to people with severe motor disabilities. Electroencephalograms (EEGs) recorded from the surface of the scalp are widely used in current BCIs for their non-invasive nature and easy applications. Among EEG based BCIs, systems based on visual evoked potentials (VEPs) have received widespread attention in recent decades. We described the three stimulus modulation approaches used in current VEP based BCIs: time modulation (t-VEP), frequency modulation (f-VEP), and pseudorandom code modulation (c-VEP). We then carried out a detailed comparison of system performance between an f-VEP BCI and a c-VEP BCI. The results show that an f-VEP BCI has the advantage of little or no training and simple system configuration, while the c-VEP based BCI has a higher communication speed. The stimulus modulation design is the crux of VEP based BCI systems.