P300的BCI汉字在线输入系统  

A P300-Based BCI System for Online Chinese Input

作　　者：徐鑫[1] 方慧娟[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2015年第3期269-274,共6页Journal of Huaqiao University(Natural Science)

摘　　要：针对在P300的脑-机接口(BCI)汉字输入系统中输入速度较慢的问题,开发了一套新型的汉字拼音输入在线脑-机接口系统.用户界面中设计新型的二级选择模式,减小了用户在实验中的视角转移,并且将自然语言处理(NLP)技术用到此系统中,可以使此套在线系统的正确率和速度都有所提高.实验结果表明:此改进的P300-BCI系统汉字输入速率可达1.37字·min-1,有效地提高了汉字的输入速率;随着用户使用次数增多,系统的效果会进一步得到提高,用户与外界交流将会更加方便快捷.To deal with the issue of the slow speed for Chinese input in a P300-based brain-computer interface （BCI）, the paper developed a new P300-based BCI system for online Chinese input.By a combination of two-level selection mode and natural language processing methods,the proposed system can not only reduce the user′s sight transfers in the experi-ment,but also improve the accuracy and transfer rate.The experimental results showed that an average input rate of 1.37 characters per minute was attained for above mention P300-BCI system.Besides,the more the system being used,the better the results could be achieved.It will be more convenient to communicate with the outside world for the users with the improved system.

关 键 词：脑-机接口 汉字输入系统 二级选择模式 自然语言处理 汉字拼音 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]