A Virtual Chinese Keyboard BCI System Based on P300 Potentials

WU Bian; SU Yu; ZHANG Jian-hui; LI Xin; ZHANG Ji-cai; CHENG Wei-dong; ZHENG Xiao-xiang

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A Virtual Chinese Keyboard BCI System Based on P300 Potentials

更新时间：2025-07-16

- A Virtual Chinese Keyboard BCI System Based on P300 Potentials
- Acta Electronica Sinica Vol. 37, Issue 8, Pages: 1733-1738(2009)
- 作者机构：
  
  1. 浙江大学求是高等研究院,浙江,杭州,310027
  2. 浙江大学生物医学工程与仪器科学学院,浙江,杭州,310027
  3. 浙江大学计算机科学与技术学院,浙江,杭州,310027
  4. 浙江大学求是高等研究院浙江杭州,310027
  5. 浙江大学生物医学工程与仪器科学学院浙江杭州,310027
  6. 浙江大学计算机科学与技术学院浙江杭州,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP399R318
- Published：2009
- 稿件说明：
移动端阅览
WU Bian, SU Yu, ZHANG Jian-hui, et al. A Virtual Chinese Keyboard BCI System Based on P300 Potentials[J]. Acta Electronica Sinica, 2009, 37(8): 1733-1738.
DOI：

WU Bian, SU Yu, ZHANG Jian-hui, et al. A Virtual Chinese Keyboard BCI System Based on P300 Potentials[J]. Acta Electronica Sinica, 2009, 37(8): 1733-1738. DOI：

摘要

近年来各种信号处理技术随着计算能力的提高取得了巨大进展

推动了人机交互(HCI)技术的发展.脑机接口(BCI)是一种特殊的人机交互通道

在最近几年引起广泛关注.P300电位是一种事件相关电位

利用诱发人类P300的原理

可以实现基于P300的BCI系统.此类系统以往常用于英文字母的输入

本研究首次设计并开发了一套进行汉字输入的在线P300-BCI系统.系统利用汉字基于笔画的特性简化了P300诱发界面

并据此设计了相应的汉字虚拟键盘.利用此系统进行的在线输入实验表明

此中文BCI的设计是可行的

对系统的进一步完善将可以为汉语系的瘫痪患者的机能恢复提供新的选项.

Abstract

The Human-Computer Interaction (HCI) technology realm has witnessed the rise of new HCI channels in recent years

which is powered by enhancement of various signal-processing methods following the computer capacity boost in the last decade.Brain-Computer Interface (BCI)

which has attracted broad notice

is one of such channels.The P300-based BCI utilizes the endogenous P300 event related potentials to decode user’s intention.Most of previous applications of P300-BCI systems were targeted at English letter input.Our research developed the first Chinese input online BCI system based on P300 potentials.We took advantage of the stroke-comprising characteristics of Chinese characters to simplify the P300 induction interface

and designed the Chinese typing virtual keyboard accordingly.Online human experiments showed that the Chinese BCI idea is viable

and further improvement of the system could provide the Chinese-speaking paralyzed patients a new option to restore their body functions.

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